fix: make the AMS device UI work on non-Bambu printer agents

Resolve the filament list's printer model from the agent-reported model id or the selected printer profile, so the AMS Materials Setting dropdown and its Confirm button work on OrcaSonar. Third-party trays pre-fill and allow editing their temps, and the popup's initial selection no longer overwrites them.

Render explicitly-empty trays as "Empty" instead of "?" using a wire-derived DevAmsTray::is_empty, while keeping the slot editable.

Hide the flow-dynamics K/N controls for non-Bambu agents — tile, dialog, validation and sends — with Bambu behavior unchanged.

Tests cover model resolution, the K/N gate and empty-tray classification.

src/libslic3r/PresetBundle.cpp

@@ -4273,9 +4273,21 @@ std::vector<std::vector<DynamicPrintConfig>> PresetBundle::get_extruder_filament
     return filament_infos;
 }
 
-// ORCA TODO: currently, this function assumes the printer name follows the pattern of "<printer_model> <nozzle_diameter>", e.g.
-// printer_type: "Bambu Lab X2D", nozzle_diameter_str: "0.4 nozzle" => printer_name: "Bambu Lab X2D 0.4 nozzle". If the printer name does
-// not follow this pattern, the function may not work correctly.
+std::string PresetBundle::get_printer_model_display_name(const std::string &model_id) const
+{
+    if (model_id.empty())
+        return {};
+    for (const auto &vendor_entry : vendors) {
+        for (const auto &model : vendor_entry.second.models) {
+            if (model.model_id == model_id)
+                return model.name;
+        }
+    }
+    return {};
+}
+
+// ORCA TODO: this assumes printer names follow "<printer_model> <nozzle_diameter>", e.g.
+// "Bambu Lab X2D 0.4 nozzle". Other naming schemes may not resolve correctly.
 std::set<std::string> PresetBundle::get_printer_names_by_printer_type_and_nozzle(const std::string &printer_type, std::string nozzle_diameter_str, bool system_only)
 {
     std::set<std::string> printer_names;
@@ -4297,7 +4309,9 @@ std::set<std::string> PresetBundle::get_printer_names_by_printer_type_and_nozzle
         if (printer_it->name.find(nozzle_diameter_str) != std::string::npos) printer_names.insert(printer_it->name);
     }
 
-    assert(printer_names.size() == 1);
+    // No match is normal for a connected machine the user has not installed; only an
+    // ambiguous match is a bug (the caller assumes one preset per model and nozzle).
+    assert(printer_names.size() <= 1);
 
     for (auto& printer_name : printer_names) {
         BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << " " << __LINE__ << " printer name: " << printer_name;
@@ -4310,8 +4324,8 @@ std::vector<Preset *> PresetBundle::get_filament_presets_for_machine(const std::
                                                                     const std::string &nozzle_diameter_str,
                                                                     bool               include_user_presets)
 {
-    // Printer model plus nozzle diameter is expected to resolve to a single system printer preset;
-    // get_printer_names_by_printer_type_and_nozzle asserts as much in debug builds.
+    // Printer model plus nozzle diameter normally resolves to a single system printer preset.
+    // Zero matches is normal for a connected machine the user never installed.
     const std::set<std::string> printer_names = get_printer_names_by_printer_type_and_nozzle(printer_type, nozzle_diameter_str);
     const Preset *printer = printer_names.empty() ? nullptr : printers.find_preset(*printer_names.begin());
     if (printer == nullptr)

src/libslic3r/PresetBundle.hpp

@@ -391,6 +391,9 @@ public:
 
     std::vector<std::vector<DynamicPrintConfig>> get_extruder_filament_info() const;
 
+    // Resolve a vendor model id (an agent-reported machine identity) to the display name
+    // printer profiles use as printer_model. Empty when no loaded vendor declares it.
+    std::string get_printer_model_display_name(const std::string &model_id) const;
     std::set<std::string> get_printer_names_by_printer_type_and_nozzle(const std::string &printer_type, std::string nozzle_diameter_str, bool system_only = true);
     // Orca: the root filament presets a connected machine can use, resolved with the rule the rest
     // of the app applies (is_compatible_with_printer): an empty compatible_printers means every

src/slic3r/GUI/AMSDryControl.cpp

@@ -7,6 +7,7 @@
 #include "slic3r/GUI/DeviceCore/DevExtruderSystem.h"
 
 #include "slic3r/GUI/DeviceCore/DevManager.h"
+#include "slic3r/GUI/DeviceManager.hpp"
 
 #include "slic3r/GUI/MsgDialog.hpp"
 
@@ -1602,8 +1603,16 @@ int AMSDryCtrWin::update_filament_list(DevAms* dev_ams, MachineObject* obj)
         stream << std::fixed << std::setprecision(1) << obj->GetExtderSystem()->GetNozzleDiameter(extruder_id);
         std::string nozzle_diameter_str = stream.str();
 
+        // The connected device's model may not resolve (OrcaSonar's is optional); the
+        // helper falls back to the selected profile so the list is never empty.
+        const std::string filament_printer_model = resolve_filament_printer_model(obj->printer_type, preset_bundle);
+        if (filament_printer_model.empty()) {
+            BOOST_LOG_TRIVIAL(warning) << __FUNCTION__ << " cannot resolve a printer model for the filament list";
+            return false;
+        }
+
         for (Preset *filament_it : preset_bundle->get_filament_presets_for_machine(
-                 DevPrinterConfigUtil::get_printer_display_name(obj->printer_type), nozzle_diameter_str, obj->is_support_user_preset)) {
+                 filament_printer_model, nozzle_diameter_str, obj->is_support_user_preset)) {
             if (!filament_id_set.insert(filament_it->filament_id).second)
                 continue;
             const std::string filament_alias = filaments.get_preset_alias(*filament_it, true);

src/slic3r/GUI/AMSMaterialsSetting.cpp

@@ -431,6 +431,11 @@ void AMSMaterialsSetting::update_filament_editing(bool is_printing)
         m_button_confirm->Show(true);
     }
 
+    // A third-party tray owns its temp range; BBL RFID trays keep the read-only preset values.
+    const bool can_edit = !is_printing || obj->is_support_filament_setting_inprinting;
+    m_input_nozzle_min->Enable(m_is_third && can_edit);
+    m_input_nozzle_max->Enable(m_is_third && can_edit);
+
     if (!m_is_third) {
         m_tip_readonly->SetLabelText(wxEmptyString);
         m_tip_readonly->Hide();
@@ -453,6 +458,8 @@ void AMSMaterialsSetting::update_filament_editing(bool is_printing)
     if (m_view_only) { // Orca: view-only (2D laser/cut) — lock every edit control and hide apply/reset
         m_comboBox_filament->Enable(false);
         m_comboBox_cali_result->Enable(false);
+        m_input_nozzle_min->Enable(false);
+        m_input_nozzle_max->Enable(false);
         m_input_k_val->Enable(false);
         m_input_n_val->Enable(false);
         m_button_confirm->Hide();
@@ -502,7 +509,7 @@ void AMSMaterialsSetting::on_select_reset(wxCommandEvent& event) {
         }
 
         // set k / n value
-        if (obj->cali_version <= -1 && obj->get_printer_series() == PrinterSeries::SERIES_P1P) {
+        if (obj->supports_extrusion_cali() && obj->cali_version <= -1 && obj->get_printer_series() == PrinterSeries::SERIES_P1P) {
             // set extrusion cali ratio
             int cali_tray_id = ams_id * 4 + slot_id;
 
@@ -523,7 +530,7 @@ void AMSMaterialsSetting::on_select_reset(wxCommandEvent& event) {
             }
             obj->command_extrusion_cali_set(cali_tray_id, "", "", k, n);
         }
-        else {
+        else if (obj->supports_extrusion_cali()) {
             PACalibIndexInfo select_index_info;
             int tray_id = ams_id * 4 + slot_id;
             if (is_virtual_tray()) {
@@ -705,7 +712,7 @@ void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
     wxString k_text = m_input_k_val->GetTextCtrl()->GetValue();
     wxString n_text = m_input_n_val->GetTextCtrl()->GetValue();
 
-    if (obj->cali_version <= -1 && (obj->get_printer_series() != PrinterSeries::SERIES_X1) && !ExtrusionCalibration::check_k_validation(k_text)) {
+    if (obj->supports_extrusion_cali() && obj->cali_version <= -1 && (obj->get_printer_series() != PrinterSeries::SERIES_X1) && !ExtrusionCalibration::check_k_validation(k_text)) {
         wxString k_tips = wxString::Format(_L("Please input a valid value (K in %.1f~%.1f)"), MIN_PA_K_VALUE, MAX_PA_K_VALUE);
         wxString kn_tips = wxString::Format(_L("Please input a valid value (K in %.1f~%.1f, N in %.1f~%.1f)"), MIN_PA_K_VALUE, MAX_PA_K_VALUE, 0.6, 2.0);
         MessageDialog msg_dlg(nullptr, k_tips, wxEmptyString, wxICON_WARNING | wxOK);
@@ -735,7 +742,7 @@ void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
             vt_tray = VIRTUAL_TRAY_DEPUTY_ID;
         }
 
-        if (obj->cali_version >= 0) {
+        if (obj->supports_extrusion_cali() && obj->cali_version >= 0) {
             PACalibIndexInfo select_index_info;
             select_index_info.tray_id = vt_tray;
             select_index_info.ams_id = ams_id;
@@ -754,7 +761,7 @@ void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
 
             CalibUtils::select_PA_calib_result(select_index_info);
         }
-        else {
+        else if (obj->supports_extrusion_cali()) {
             obj->command_extrusion_cali_set(vt_tray, "", "", k, n);
         }
     }
@@ -776,7 +783,7 @@ void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
             ;
         }
 
-        if (obj->cali_version >= 0) {
+        if (obj->supports_extrusion_cali() && obj->cali_version >= 0) {
             PACalibIndexInfo select_index_info;
             select_index_info.tray_id = cali_tray_id;
             select_index_info.ams_id = ams_id;
@@ -795,7 +802,7 @@ void AMSMaterialsSetting::on_select_ok(wxCommandEvent &event)
 
             CalibUtils::select_PA_calib_result(select_index_info);
         }
-        else {
+        else if (obj->supports_extrusion_cali()) {
             obj->command_extrusion_cali_set(cali_tray_id, "", "", k, n);
         }
     }
@@ -891,7 +898,12 @@ bool AMSMaterialsSetting::is_virtual_tray()
 
 void AMSMaterialsSetting::update_widgets()
 {
-    if (obj && obj->get_printer_series() == PrinterSeries::SERIES_X1 && obj->cali_version <= -1) {
+    if (obj && !obj->supports_extrusion_cali()) {
+        // No printer-side K/N records: do not offer them.
+        m_panel_normal->Show();
+        m_panel_kn->Hide();
+    }
+    else if (obj && obj->get_printer_series() == PrinterSeries::SERIES_X1 && obj->cali_version <= -1) {
         // Low version firmware does not display k value
         m_panel_kn->Hide();
     }
@@ -952,6 +964,9 @@ void AMSMaterialsSetting::Popup(wxString filament, wxString sn, wxString temp_mi
 
     m_input_k_val->GetTextCtrl()->SetValue(k);
     m_input_n_val->GetTextCtrl()->SetValue(n);
+    // Tray values are re-supplied by every caller; clear so a previous popup cannot leak in.
+    m_input_nozzle_min->GetTextCtrl()->SetValue(wxEmptyString);
+    m_input_nozzle_max->GetTextCtrl()->SetValue(wxEmptyString);
 
     wxArrayString filament_items;
     wxString bambu_filament_name;
@@ -975,11 +990,14 @@ void AMSMaterialsSetting::Popup(wxString filament, wxString sn, wxString temp_mi
     }
     stream << std::fixed << std::setprecision(1) << machine_diameter;
     std::string nozzle_diameter_str = stream.str();
+    // OrcaSonar's model id is optional, so the device model alone can resolve to nothing;
+    // the helper falls back to the selected profile so the dropdown is never empty.
+    const std::string filament_printer_model = resolve_filament_printer_model(obj->printer_type, preset_bundle);
 
-    if (preset_bundle) {
+    if (preset_bundle && !filament_printer_model.empty()) {
         BOOST_LOG_TRIVIAL(trace) << "system_preset_bundle filament number=" << preset_bundle->filaments.size();
         for (Preset *filament_it : preset_bundle->get_filament_presets_for_machine(
-                 DevPrinterConfigUtil::get_printer_display_name(obj->printer_type), nozzle_diameter_str, obj->is_support_user_preset)) {
+                 filament_printer_model, nozzle_diameter_str, obj->is_support_user_preset)) {
             if (!filament_id_set.insert(filament_it->filament_id).second)
                 continue;
             const std::string alias = preset_bundle->filaments.get_preset_alias(*filament_it, true);
@@ -1045,6 +1063,12 @@ void AMSMaterialsSetting::Popup(wxString filament, wxString sn, wxString temp_mi
         else {
             m_comboBox_filament->Show();
             m_readonly_filament->Hide();
+            // A printer-set tray carries its own temps; the preset selection only fills
+            // them when the tray has none.
+            if (!temp_min.IsEmpty() && temp_min != "0")
+                m_input_nozzle_min->GetTextCtrl()->SetValue(temp_min);
+            if (!temp_max.IsEmpty() && temp_max != "0")
+                m_input_nozzle_max->GetTextCtrl()->SetValue(temp_max);
         }
 
         if (obj->cali_version >= 0) {
@@ -1181,7 +1205,12 @@ void AMSMaterialsSetting::Popup(wxString filament, wxString sn, wxString temp_mi
         }
     }
 
+    if (filament_items.IsEmpty())
+        BOOST_LOG_TRIVIAL(warning) << "ams_materials_setting: no filament presets for printer model \""
+                                   << filament_printer_model << "\" at nozzle " << nozzle_diameter_str;
+
     m_comboBox_filament->Set(filament_items);
+    m_comboBox_from_printer = true;
     m_comboBox_filament->SetSelection(selection_idx);
     post_select_event(selection_idx);
 
@@ -1189,9 +1218,6 @@ void AMSMaterialsSetting::Popup(wxString filament, wxString sn, wxString temp_mi
         m_comboBox_filament->SetValue(wxEmptyString);
     }
 
-    // Set the flag whether to open the filament setting dialog from the device page
-    m_comboBox_filament->SetClientData(new int(1));
-
     update();
     Layout();
     Fit();
@@ -1220,49 +1246,52 @@ void AMSMaterialsSetting::on_select_cali_result(wxCommandEvent &evt)
 
 void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
 {
-    // Get the flag whether to open the filament setting dialog from the device page
-    int* from_printer = static_cast<int*>(m_comboBox_filament->GetClientData());
+    // True for the popup's own initial selection: the dialog pre-filled the tray's
+    // temps, so the matching preset must not overwrite them.
+    const bool initial_printer_selection = m_comboBox_from_printer;
 
     m_filament_type = "";
     PresetBundle* preset_bundle = wxGetApp().preset_bundle;
+    std::string filament_printer_model;
     if (preset_bundle) {
         std::ostringstream stream;
         if (obj) {
-            // Defensive: this dialog is opened only from StatusPanel (BBL-only) today, so the fallback fires
-            // only during the brief BBL startup window before firmware reports nozzle info. Without this,
-            // the "0.0" lookup string returns an empty set and filament lookup yields no results.
+            // Use the selected profile's nozzle diameter until the connected device reports one.
             float machine_diameter = obj->GetExtderSystem()->GetNozzleDiameter(0);
             if (machine_diameter == 0.0f) {
                 const ConfigOption *opt = preset_bundle->printers.get_selected_preset().config.option("nozzle_diameter");
                 if (opt) machine_diameter = static_cast<const ConfigOptionFloats *>(opt)->values[0];
             }
             stream << std::fixed << std::setprecision(1) << machine_diameter;
+            filament_printer_model = resolve_filament_printer_model(obj->printer_type, preset_bundle);
         }
         std::string nozzle_diameter_str = stream.str();
         // Resolve the selection against the same list Popup() built the dropdown from, so the two
         // halves of the dialog cannot disagree about which filaments this machine can use.
         const std::string selected = m_comboBox_filament->GetValue().ToStdString();
-        if (!selected.empty()) {
+        if (!selected.empty() && !filament_printer_model.empty()) {
             const std::string filament_id = map_filament_items[selected].filament_id;
             for (Preset *it : preset_bundle->get_filament_presets_for_machine(
-                     DevPrinterConfigUtil::get_printer_display_name(obj->printer_type), nozzle_diameter_str, obj->is_support_user_preset)) {
+                     filament_printer_model, nozzle_diameter_str, obj->is_support_user_preset)) {
                 if (it->filament_id != filament_id)
                     continue;
-                // ) if nozzle_temperature_range is found
-                ConfigOption* opt_min = it->config.option("nozzle_temperature_range_low");
-                if (opt_min) {
-                    ConfigOptionInts* opt_min_ints = dynamic_cast<ConfigOptionInts*>(opt_min);
-                    if (opt_min_ints) {
-                        wxString text_nozzle_temp_min = wxString::Format("%d", opt_min_ints->get_at(0));
-                        m_input_nozzle_min->GetTextCtrl()->SetValue(text_nozzle_temp_min);
+                if (!initial_printer_selection) {
+                    // ) if nozzle_temperature_range is found
+                    ConfigOption* opt_min = it->config.option("nozzle_temperature_range_low");
+                    if (opt_min) {
+                        ConfigOptionInts* opt_min_ints = dynamic_cast<ConfigOptionInts*>(opt_min);
+                        if (opt_min_ints) {
+                            wxString text_nozzle_temp_min = wxString::Format("%d", opt_min_ints->get_at(0));
+                            m_input_nozzle_min->GetTextCtrl()->SetValue(text_nozzle_temp_min);
+                        }
                     }
-                }
-                ConfigOption* opt_max = it->config.option("nozzle_temperature_range_high");
-                if (opt_max) {
-                    ConfigOptionInts* opt_max_ints = dynamic_cast<ConfigOptionInts*>(opt_max);
-                    if (opt_max_ints) {
-                        wxString text_nozzle_temp_max = wxString::Format("%d", opt_max_ints->get_at(0));
-                        m_input_nozzle_max->GetTextCtrl()->SetValue(text_nozzle_temp_max);
+                    ConfigOption* opt_max = it->config.option("nozzle_temperature_range_high");
+                    if (opt_max) {
+                        ConfigOptionInts* opt_max_ints = dynamic_cast<ConfigOptionInts*>(opt_max);
+                        if (opt_max_ints) {
+                            wxString text_nozzle_temp_max = wxString::Format("%d", opt_max_ints->get_at(0));
+                            m_input_nozzle_max->GetTextCtrl()->SetValue(text_nozzle_temp_max);
+                        }
                     }
                 }
                 ConfigOption* opt_type = it->config.option("filament_type");
@@ -1301,13 +1330,16 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
         m_button_confirm->Disable(); // ORCA No need to change style
         m_comboBox_cali_result->Clear();
         m_comboBox_cali_result->SetValue(wxEmptyString);
-        m_input_k_val->GetTextCtrl()->SetValue(wxEmptyString);
-        m_input_n_val->GetTextCtrl()->SetValue(wxEmptyString);
-        m_comboBox_filament->SetClientData(new int(0));
+        if (!initial_printer_selection) {
+            m_input_k_val->GetTextCtrl()->SetValue(wxEmptyString);
+            m_input_n_val->GetTextCtrl()->SetValue(wxEmptyString);
+        }
+        m_comboBox_from_printer = false;
         return;
     }
     else {
-        m_button_confirm->Enable(true);  // ORCA No need to change style
+        if (!m_view_only)
+            m_button_confirm->Enable(true);  // ORCA No need to change style
     }
 
     //filament id
@@ -1331,6 +1363,9 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
         }
     }
 
+    if (!ams_filament_id.empty())
+        m_clr_picker->is_empty(false);
+
     wxArrayString items;
     m_pa_profile_items.clear();
     m_comboBox_cali_result->SetValue(wxEmptyString);
@@ -1386,7 +1421,7 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
 
         m_comboBox_cali_result->Set(items);
         if (ams_id == VIRTUAL_TRAY_MAIN_ID || ams_id == VIRTUAL_TRAY_DEPUTY_ID) {
-            if (from_printer && (*from_printer == 1)) {
+            if (initial_printer_selection) {
                 for (auto slot : obj->vt_slot) {
                     if (slot.id == std::to_string(ams_id))
                         cali_select_idx = CalibUtils::get_selected_calib_idx(m_pa_profile_items, slot.cali_idx);
@@ -1403,10 +1438,11 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
             }
         }
         else {
-            if (from_printer && (*from_printer == 1)) {
+            if (initial_printer_selection) {
                 DevAmsTray* selected_tray = this->obj->GetFilaSystem()->GetAmsTray(std::to_string(ams_id), std::to_string(slot_id));
                 if (!selected_tray)
                 {
+                    m_comboBox_from_printer = false;
                     return;
                 }
 
@@ -1437,7 +1473,7 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
     else {
         if (!ams_filament_id.empty()) {
             //m_input_k_val->GetTextCtrl()->SetValue("0.00");
-            m_input_k_val->Enable(true);
+            m_input_k_val->Enable(!m_view_only);
         }
         else {
             //m_input_k_val->GetTextCtrl()->SetValue("0.00");
@@ -1445,7 +1481,7 @@ void AMSMaterialsSetting::on_select_filament(wxCommandEvent &evt)
         }
     }
 
-    m_comboBox_filament->SetClientData(new int(0));
+    m_comboBox_from_printer = false;
 }
 
 void AMSMaterialsSetting::on_dpi_changed(const wxRect &suggested_rect)

src/slic3r/GUI/AMSMaterialsSetting.hpp

@@ -122,7 +122,7 @@ public:
     std::string    ams_filament_id;
     std::string    ams_setting_id;
 
-    bool           m_is_third;
+    bool           m_is_third = false;
     // Orca: view-only mode (laser/cut). When set, the dialog is inspectable but every
     // editing control is disabled and no command is sent.
     bool           m_view_only = false;
@@ -182,6 +182,9 @@ protected:
     wxStaticText*       m_n_param;
     TextInput*          m_input_n_val;
     int                 m_filament_selection;
+    // True while the popup's initial, printer-driven selection is being handled; it
+    // keeps that selection from overwriting the tray's own temps with preset temps.
+    bool                m_comboBox_from_printer = false;
 
     int m_pa_cali_select_id = 0;
 

src/slic3r/GUI/CaliHistoryDialog.cpp

@@ -714,9 +714,15 @@ wxArrayString NewCalibrationHistoryDialog::get_all_filaments(const MachineObject
     std::string nozzle_diameter_str = stream.str();
 
     if (preset_bundle) {
+        // OrcaSonar's model id is optional; the helper falls back to the selected profile
+        // so the list is never empty.
+        const std::string filament_printer_model = resolve_filament_printer_model(obj->printer_type, preset_bundle);
+        if (filament_printer_model.empty())
+            return filament_items;
+
         BOOST_LOG_TRIVIAL(trace) << "system_preset_bundle filament number=" << preset_bundle->filaments.size();
         for (Preset *filament_it : preset_bundle->get_filament_presets_for_machine(
-                 DevPrinterConfigUtil::get_printer_display_name(obj->printer_type), nozzle_diameter_str, obj->is_support_user_preset)) {
+                 filament_printer_model, nozzle_diameter_str, obj->is_support_user_preset)) {
             if (!filament_id_set.insert(filament_it->filament_id).second)
                 continue;
             const std::string alias = preset_bundle->filaments.get_preset_alias(*filament_it, true);

src/slic3r/GUI/DeviceCore/DevFilaSystem.cpp

@@ -11,6 +11,8 @@
 #include "DevUtil.h"
 #include "DevUtilBackend.h"
 
+#include <algorithm>
+
 using namespace nlohmann;
 
 namespace Slic3r {
@@ -42,6 +44,15 @@ void DevAmsTray::UpdateColorFromStr(const std::string& color)
     }
 }
 
+void DevAmsTray::UpdateEmptyState(bool material_fields_present)
+{
+    const auto is_zero_or_empty = [](const std::string& value) {
+        return value.empty() || std::all_of(value.begin(), value.end(), [](char c) { return c == '0'; });
+    };
+    is_empty = material_fields_present && setting_id.empty() && m_fila_type.empty() &&
+               is_zero_or_empty(color) && is_zero_or_empty(tag_uid);
+}
+
 void DevAmsTray::reset()
 {
     tag_uid             = "";
@@ -63,6 +74,7 @@ void DevAmsTray::reset()
     k                   = 0.0f;
     n                   = 0.0f;
     is_bbl              = false;
+    is_empty            = false;
     hold_count          = 0;
     remain              = 0;
 }
@@ -662,7 +674,7 @@ void DevFilaSystemParser::ParseV1_0(const json& jj, MachineObject* obj, DevFilaS
                                 //std::string type            = (*tray_it)["tray_type"].get<std::string>();
                                 std::string type = MachineObject::setting_id_to_type(curr_tray->setting_id, (*tray_it)["tray_type"].get<std::string>());
                                 // curr_tray->setting_id is our OF id; GFS00/GFS01 are the printer's own support-filament ids.
-                                auto* agent = GUI::wxGetApp().getAgent();
+                                auto* agent = wxTheApp != nullptr ? GUI::wxGetApp().getAgent() : nullptr;
                                 const std::string printer_filament_id = agent ? agent->from_orca_filament_id(curr_tray->setting_id) : curr_tray->setting_id;
                                 if (printer_filament_id == "GFS00")
                                 {
@@ -762,6 +774,7 @@ void DevFilaSystemParser::ParseV1_0(const json& jj, MachineObject* obj, DevFilaS
                             {
                                 curr_tray->remain = -1;
                             }
+                            curr_tray->UpdateEmptyState(tray_it->contains("tray_info_idx") && tray_it->contains("tray_type"));
                             // The tray objects are reused across status updates. Reset this
                             // state when a previously empty slot receives a filament again.
                             curr_tray->is_slot_placeholder = tray_it->contains("tray_slot_placeholder");

src/slic3r/GUI/DeviceCore/DevFilaSystem.h

@@ -82,6 +82,7 @@ public:
     wxColour        wx_color;
     bool            is_bbl;
     bool            is_exists = false;
+    bool            is_empty = false;  // Explicitly reported as having no filament.
     bool            is_slot_placeholder = false;  // Orca: True for empty tray slots from pull-mode agents
     int             hold_count = 0;
     int             remain = 0;         // filament remain: 0 ~ 100
@@ -90,13 +91,15 @@ public:
     // operators
     bool operator==(DevAmsTray const& o) const
     {
-        return id == o.id && m_fila_type == o.m_fila_type && filament_setting_id == o.filament_setting_id && color == o.color;
+        return id == o.id && m_fila_type == o.m_fila_type && filament_setting_id == o.filament_setting_id &&
+               color == o.color && is_empty == o.is_empty;
     }
     bool operator!=(DevAmsTray const& o) const { return !operator==(o); }
 
     // setters
     void reset();
     void UpdateColorFromStr(const std::string& color);
+    void UpdateEmptyState(bool material_fields_present);
     void set_hold_count() { hold_count = HOLD_COUNT_MAX; }
 
     // getter

src/slic3r/GUI/DeviceManager.cpp

@@ -374,6 +374,32 @@ NozzleVolumeType convert_to_nozzle_type(const std::string &str)
     return res;
 }
 
+std::string resolve_filament_printer_model(const std::string& printer_type, PresetBundle* preset_bundle)
+{
+    if (!preset_bundle)
+        return {};
+
+    // Devices with a shipped printer config (Bambu) resolve directly.
+    if (const std::string display_name = DevPrinterConfigUtil::get_printer_display_name(printer_type); !display_name.empty())
+        return display_name;
+
+    // A vendor model id the device reported (SSDP modelNumber, manual binding).
+    if (!printer_type.empty()) {
+        if (const std::string model_name = preset_bundle->get_printer_model_display_name(printer_type); !model_name.empty())
+            return model_name;
+    }
+
+    // OrcaSonar's model id is optional; a generic device resolves against the selected profile.
+    if (const ConfigOptionString* model = preset_bundle->printers.get_selected_preset().config.opt<ConfigOptionString>("printer_model");
+        model && !model->value.empty()) {
+        BOOST_LOG_TRIVIAL(info) << "resolve_filament_printer_model: device type \"" << printer_type
+                                << "\" has no installed model; using the selected profile \"" << model->value << "\"";
+        return model->value;
+    }
+
+    return {};
+}
+
 wxString MachineObject::get_printer_type_display_str() const
 {
     std::string display_name = DevPrinterConfigUtil::get_printer_display_name(printer_type);
@@ -1759,6 +1785,12 @@ bool MachineObject::orca_ams_command_supported(const char* command) const
     return command != nullptr && supported_commands.count(command) != 0;
 }
 
+bool MachineObject::supports_extrusion_cali() const
+{
+    // Devices with no agent id predate the agent split and keep the Bambu path.
+    return printer_agent_id.empty() || printer_agent_id == BBL_PRINTER_AGENT_ID;
+}
+
 int MachineObject::command_ams_filament_settings(int ams_id, int slot_id, std::string filament_id, std::string setting_id, std::string tray_color, std::string tray_type, int nozzle_temp_min, int nozzle_temp_max)
 {
     // OrcaSonar: writing slot metadata is gated on the filament_slots capability.
@@ -2850,6 +2882,7 @@ int MachineObject::local_publish_json(std::string json_str, int qos, int flag)
 std::string MachineObject::setting_id_to_type(std::string setting_id, std::string tray_type)
 {
     std::string type;
+    if (wxTheApp == nullptr) return tray_type;
     PresetBundle* preset_bundle = GUI::wxGetApp().preset_bundle;
     if (preset_bundle) {
         for (auto it = preset_bundle->filaments.begin(); it != preset_bundle->filaments.end(); it++) {
@@ -4186,6 +4219,9 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
                             vt_slot[0].setting_id = jj["tray_info_idx"].get<std::string>();
                             //vt_tray.type = jj["tray_type"].get<std::string>();
                             vt_slot[0].m_fila_type = setting_id_to_type(vt_slot[0].setting_id, jj["tray_type"].get<std::string>());
+                            // The ack carries the whole slot; re-derive empty so the panel flips off
+                            // "Empty" without waiting out the hold.
+                            vt_slot[0].UpdateEmptyState(true);
                             // delay update
                             vt_slot[0].set_hold_count();
                         } else {
@@ -4211,6 +4247,9 @@ int MachineObject::parse_json(std::string tunnel, std::string payload, bool key_
 
                                     tray_it->second->setting_id = jj["tray_info_idx"].get<std::string>();
                                     tray_it->second->m_fila_type = setting_id_to_type(tray_it->second->setting_id, jj["tray_type"].get<std::string>());
+                                    // The ack carries the whole slot; re-derive empty so the panel flips off
+                                    // "Empty" without waiting out the hold.
+                                    tray_it->second->UpdateEmptyState(true);
                                     // delay update
                                     tray_it->second->set_hold_count();
                                 } else {
@@ -5148,7 +5187,7 @@ DevAmsTray MachineObject::parse_vt_tray(json vtray)
             //std::string type = vtray["tray_type"].get<std::string>();
             std::string type = setting_id_to_type(vt_tray.setting_id, vtray["tray_type"].get<std::string>());
             // vt_tray.setting_id is our OF id (translated on the way in); the two support ids below are the printer's own.
-            auto* agent = GUI::wxGetApp().getAgent();
+            auto* agent = wxTheApp != nullptr ? GUI::wxGetApp().getAgent() : nullptr;
             const std::string printer_filament_id = agent ? agent->from_orca_filament_id(vt_tray.setting_id) : vt_tray.setting_id;
             if (printer_filament_id == "GFS00") {
                 vt_tray.m_fila_type = "PLA-S";
@@ -5243,6 +5282,7 @@ DevAmsTray MachineObject::parse_vt_tray(json vtray)
         else {
             vt_tray.remain = -1;
         }
+        vt_tray.UpdateEmptyState(vtray.contains("tray_info_idx") && vtray.contains("tray_type"));
     }
 
     return vt_tray;

src/slic3r/GUI/DeviceManager.hpp

@@ -67,6 +67,7 @@ class DeviceErrorDialog; // Previous definitions
 
 class NetworkAgent;
 // Orca: ManualPaCaliMethod now provided by DeviceCore/DevCalib.h (enum class)
+class PresetBundle;
 
 #define UpgradeNoError          0
 #define UpgradeDownloadFailed   -1
@@ -102,6 +103,11 @@ struct DevPrintTaskRatingInfo;
 // given nozzle diameter (mm), bucketed per nozzle size to mirror the printer firmware.
 bool is_stringing_prone_filament(const std::string& filament_id, float nozzle_diameter);
 
+// The printer model filament presets are matched against for a connected machine. OrcaSonar's
+// model id is optional, so a device with no installed vendor model falls back to the selected
+// printer profile rather than resolving to no filament list at all.
+std::string resolve_filament_printer_model(const std::string& printer_type, PresetBundle* preset_bundle);
+
 class MachineObject
 {
 private:
@@ -799,6 +805,10 @@ public:
     // always allow; an Orca device must have advertised the command (unknown
     // capability is not support).
     bool orca_ams_command_supported(const char* command) const;
+    // The per-tray flow-dynamics K/N records are a Bambu firmware feature. Other
+    // agents have no printer-side calibration to read or write, so the AMS UI must
+    // not offer K/N for them.
+    bool supports_extrusion_cali() const;
     // ams controls
     //int command_ams_switch(int tray_index, int old_temp = 210, int new_temp = 210);
     int command_ams_change_filament(bool load, std::string ams_id, std::string slot_id, int old_temp = 210, int new_temp = 210, std::optional<int> extruder_id = std::nullopt);

src/slic3r/GUI/DeviceTab/uiAMSBestPositionPopup.cpp

@@ -943,7 +943,11 @@ int ReselectMachineDialog::CaculateSwitcherDistribution(MachineObject* obj, cons
                 const auto& can = ams.cans[j];
                 auto id = getTrayID(obj, ams.ams_id, can.can_id);
                 auto material = can.material_name;
-                if (can.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND ||
+                if (can.is_empty || can.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY)
+                {
+                    material = L("Empty");
+                }
+                else if (can.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND ||
                     can.material_state == AMSCanType::AMS_CAN_TYPE_BRAND ||
                     can.material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL)
                 {
@@ -952,10 +956,6 @@ int ReselectMachineDialog::CaculateSwitcherDistribution(MachineObject* obj, cons
                         material = L("?");
                     }
                 }
-                if (can.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY)
-                {
-                    material = "Empty";
-                }
 
                 auto itOK = std::find_if(posOK.begin(), posOK.end(), [&](const trayHelper& tray){
                     auto amsID = std::get<0>(tray);

src/slic3r/GUI/StatusPanel.cpp

@@ -4603,12 +4603,14 @@ void StatusPanel::on_filament_edit(wxCommandEvent &event)
                 }
 
                 m_filament_setting_dlg->m_is_third = !DevFilaSystem::IsBBL_Filament(tray->tag_uid);
+                // The tray's own temps pre-fill the dialog for every tray type; a BBL tray
+                // additionally carries the SN and brand.
+                temp_max = tray->nozzle_temp_max;
+                temp_min = tray->nozzle_temp_min;
                 if (!m_filament_setting_dlg->m_is_third)
                 {
                     sn_number = tray->uuid;
                     filament = tray->sub_brands;
-                    temp_max = tray->nozzle_temp_max;
-                    temp_min = tray->nozzle_temp_min;
                 }
             }
 
@@ -4669,11 +4671,11 @@ void StatusPanel::on_ext_spool_edit(wxCommandEvent &event)
             }
 
             m_filament_setting_dlg->m_is_third = !DevFilaSystem::IsBBL_Filament(obj->vt_slot[nozzle_index].tag_uid);
+            temp_max = obj->vt_slot[nozzle_index].nozzle_temp_max;
+            temp_min = obj->vt_slot[nozzle_index].nozzle_temp_min;
             if (!m_filament_setting_dlg->m_is_third) {
                 sn_number = obj->vt_slot[nozzle_index].uuid;
                 filament  = obj->vt_slot[nozzle_index].sub_brands;
-                temp_max  = obj->vt_slot[nozzle_index].nozzle_temp_max;
-                temp_min  = obj->vt_slot[nozzle_index].nozzle_temp_min;
             }
 
             m_filament_setting_dlg->Move(wxPoint(current_position_x,current_position_y));

src/slic3r/GUI/Widgets/AMSItem.cpp

@@ -72,6 +72,7 @@ bool AMSinfo::parse_ams_info(MachineObject *obj, DevAms *ams, bool remain_flag,
         Caninfo info;
         // tray is exists
         if (it != ams->GetTrays().end() && it->second->is_exists) {
+            info.is_empty = it->second->is_empty;
             if (it->second->is_tray_info_ready()) {
                 info.can_id        = it->second->id;
                 info.ctype         = it->second->ctype;
@@ -139,6 +140,7 @@ void AMSinfo::parse_ext_info(MachineObject* obj, DevAmsTray tray) {
     this->ams_type = AMSModel::EXT_AMS;
     Caninfo info;
     info.can_id = std::to_string(0);
+    info.is_empty = tray.is_empty;
     this->cans.clear();
 
     if (tray.id == std::to_string(VIRTUAL_TRAY_MAIN_ID))
@@ -1101,9 +1103,9 @@ void AMSLib::render_lite_text(wxDC& dc)
     dc.SetTextForeground(temp_text_colour);
 
     auto libsize = GetSize();
-    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND
+    if (!m_info.is_empty && (m_info.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND
         || m_info.material_state == AMSCanType::AMS_CAN_TYPE_BRAND
-        || m_info.material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL) {
+        || m_info.material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL)) {
 
         if (m_info.material_name.empty()) {
             auto tsize = dc.GetMultiLineTextExtent("?");
@@ -1151,7 +1153,7 @@ void AMSLib::render_lite_text(wxDC& dc)
         }
     }
 
-    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY) {
+    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY || m_info.is_empty) {
         auto tsize = dc.GetMultiLineTextExtent(_L("/"));
         auto pot = wxPoint((libsize.x - tsize.x) / 2 + FromDIP(2), (libsize.y - tsize.y) / 2 + FromDIP(3));
         dc.DrawText(_L("/"), pot);
@@ -1160,8 +1162,12 @@ void AMSLib::render_lite_text(wxDC& dc)
 
 void AMSLib::render_generic_text(wxDC &dc)
 {
-    bool show_k_value = true;
-    if (m_info.material_name.empty()) {
+    // K/N is Bambu firmware's flow-dynamics calibration; agents with no printer-side
+    // records (OrcaSonar, Moonraker) must not show a synthesized value.
+    const bool k_supported = !m_obj || m_obj->supports_extrusion_cali();
+    const bool show_kn = m_show_kn && k_supported;
+    bool show_k_value = k_supported;
+    if (!k_supported || m_info.material_name.empty()) {
         show_k_value = false;
     }
     else if (m_info.cali_idx == -1 || (m_obj && (CalibUtils::get_selected_calib_idx(m_obj->pa_calib_tab, m_info.cali_idx) == -1))) {
@@ -1202,9 +1208,9 @@ void AMSLib::render_generic_text(wxDC &dc)
     }
 
     auto libsize = GetSize();
-    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND
+    if (!m_info.is_empty && (m_info.material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND
         || m_info.material_state == AMSCanType::AMS_CAN_TYPE_BRAND
-        || m_info.material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL) {
+        || m_info.material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL)) {
 
         if (m_info.material_name.empty() /*&&  m_info.material_state != AMSCanType::AMS_CAN_TYPE_VIRTUAL*/) {
             auto tsize = dc.GetMultiLineTextExtent("?");
@@ -1242,7 +1248,7 @@ void AMSLib::render_generic_text(wxDC &dc)
                 auto line_top_tsize = dc.GetMultiLineTextExtent(line_top);
                 auto line_bottom_tsize = dc.GetMultiLineTextExtent(line_bottom);
 
-                if (!m_show_kn) {
+                if (!show_kn) {
                     auto pot_top = wxPoint((libsize.x - line_top_tsize.x) / 2, (libsize.y - line_top_tsize.y) / 2 - line_top_tsize.y + FromDIP(6));
                     dc.DrawText(line_top, pot_top);
 
@@ -1273,7 +1279,7 @@ void AMSLib::render_generic_text(wxDC &dc)
 
         //draw k&n
         if (m_obj && show_k_value) {
-            if (m_show_kn) {
+            if (show_kn) {
                 wxString str_k = wxString::Format("K %1.3f", m_info.k);
                 wxString str_n = wxString::Format("N %1.3f", m_info.n);
                 dc.SetFont(::Label::Body_11);
@@ -1284,7 +1290,7 @@ void AMSLib::render_generic_text(wxDC &dc)
         }
     }
 
-    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY) {
+    if (m_info.material_state == AMSCanType::AMS_CAN_TYPE_EMPTY || m_info.is_empty) {
         auto tsize = dc.GetMultiLineTextExtent(_L("Empty"));
         auto pot = wxPoint((libsize.x - tsize.x) / 2, (libsize.y - tsize.y) / 2 + FromDIP(3));
         dc.DrawText(_L("Empty"), pot);
@@ -2781,7 +2787,7 @@ void AMSPreview::doRender(wxDC &dc)
                 }
                 else {
                     wxRect rect(left, (size.y - AMS_ITEM_CUBE_SIZE.y) / 2, AMS_ITEM_CUBE_SIZE.x, AMS_ITEM_CUBE_SIZE.y);
-                    if (iter->material_state == AMSCanType::AMS_CAN_TYPE_EMPTY) {
+                    if (iter->material_state == AMSCanType::AMS_CAN_TYPE_EMPTY || iter->is_empty) {
                         dc.SetPen(wxPen(wxColor(0, 0, 0)));
                         dc.DrawLine(rect.GetRight() - FromDIP(1), rect.GetTop() + FromDIP(1), rect.GetLeft() + FromDIP(1), rect.GetBottom() - FromDIP(1));
                     }

src/slic3r/GUI/Widgets/AMSItem.hpp

@@ -183,6 +183,7 @@ struct Caninfo
     wxString        material_name;
     wxColour        material_colour = {*wxWHITE};
     AMSCanType      material_state;
+    bool            is_empty = false;
     int             ctype=0;
     int             material_remain = 100;
     int             cali_idx = -1;
@@ -198,6 +199,7 @@ public:
             material_name == other.material_name &&
             material_colour == other.material_colour &&
             material_state == other.material_state &&
+            is_empty == other.is_empty &&
             ctype == other.ctype &&
             material_remain == other.material_remain &&
             cali_idx == other.cali_idx &&

tests/libslic3r/test_preset_bundle_loading.cpp

@@ -1407,6 +1407,23 @@ TEST_CASE("Filaments offered for a machine follow the app's compatibility rule",
     }
 }
 
+// An agent-reported model id (SSDP modelNumber, manual binding) must resolve to the display
+// name printer profiles use as printer_model; the AMS dialogs look filaments up by it.
+TEST_CASE("Printer model ids resolve to vendor display names", "[Preset][Bundle]")
+{
+    PresetBundle bundle;
+    VendorProfile qidi("Qidi");
+    qidi.name = "Qidi";
+    VendorProfile::PrinterModel model;
+    model.model_id = "Qidi-Q1Pro";
+    model.name     = "Qidi Q1 Pro";
+    qidi.models.push_back(model);
+    bundle.vendors.emplace(qidi.id, qidi);
+
+    CHECK(bundle.get_printer_model_display_name("Qidi-Q1Pro") == "Qidi Q1 Pro");
+    CHECK(bundle.get_printer_model_display_name("unknown-model").empty());
+}
+
 
 namespace {
 

tests/slic3rutils/CMakeLists.txt

@@ -6,6 +6,7 @@ add_executable(${_TEST_NAME}_tests
     test_dev_mapping.cpp
     test_filament_bitmap_utils.cpp
     test_device_progress.cpp
+    test_ams_item.cpp
     test_device_manager_integration.cpp
     test_web_media_controller.cpp
     test_network_versions.cpp

tests/slic3rutils/test_ams_item.cpp

@@ -0,0 +1,86 @@
+// why: match the GUI include order to avoid rpcndr.h byte/std::byte
+// ambiguity in the Windows COM headers.
+#ifdef WIN32
+    #ifndef WIN32_LEAN_AND_MEAN
+        #define WIN32_LEAN_AND_MEAN
+    #endif
+    #ifndef NOMINMAX
+        #define NOMINMAX
+    #endif
+    #include <Windows.h>
+#endif
+
+#include <catch2/catch_all.hpp>
+
+#include <wx/timer.h>
+
+#include <nlohmann/json.hpp>
+
+#include "slic3r/GUI/Widgets/AMSItem.hpp"
+#include "slic3r/GUI/DeviceCore/DevFilaSystem.h"
+
+using json = nlohmann::json;
+using namespace Slic3r;
+using namespace Slic3r::GUI;
+
+// A configured slot the wire reports as having no filament (all material fields
+// present and empty) is "Empty", not the unknown "?" the UI draws for a tray
+// whose info is missing. The distinction must survive into the AMS panel model.
+TEST_CASE("Configured empty AMS trays remain distinct from unknown trays", "[AMSItem]")
+{
+    MachineObject machine(nullptr, nullptr, "test", "test-device", "127.0.0.1");
+    machine.printer_agent_id = "orca";
+
+    const json print_json = json::parse(R"({
+        "ams": {
+            "ams_exist_bits": "1",
+            "tray_exist_bits": "3",
+            "ams": [ { "id": "0", "info": "0001", "tray": [
+                { "id": "0", "tag_uid": "0000000000000000", "tray_info_idx": "", "tray_type": "", "tray_color": "00000000" },
+                { "id": "1" }
+            ] } ]
+        }
+    })");
+    DevFilaSystemParser::ParseV1_0(print_json, &machine, machine.GetFilaSystem().get(), false);
+
+    const auto& ams_list = machine.GetFilaSystem()->GetAmsList();
+    const auto  ams_it   = ams_list.find("0");
+    REQUIRE(ams_it != ams_list.end());
+    auto* ams = ams_it->second;
+    REQUIRE(ams != nullptr);
+    REQUIRE(ams->GetTray("0") != nullptr);
+    CHECK(ams->GetTray("0")->is_empty);
+
+    AMSinfo info;
+    REQUIRE(info.parse_ams_info(&machine, ams));
+    REQUIRE(info.cans.size() == 2);
+
+    CHECK(info.cans[0].is_empty);
+    CHECK(info.cans[0].material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND);
+    CHECK_FALSE(info.cans[1].is_empty);
+    CHECK(info.cans[1].material_state == AMSCanType::AMS_CAN_TYPE_THIRDBRAND);
+}
+
+TEST_CASE("Empty external slots remain distinct from unknown slots", "[AMSItem]")
+{
+    MachineObject machine(nullptr, nullptr, "test", "test-device", "127.0.0.1");
+    machine.printer_agent_id = "orca";
+
+    DevAmsTray empty_slot = machine.parse_vt_tray(json::parse(R"({
+        "id": "255", "tag_uid": "0000000000000000", "tray_info_idx": "", "tray_type": "", "tray_color": "00000000"
+    })"));
+    CHECK(empty_slot.is_empty);
+
+    AMSinfo empty_info;
+    empty_info.parse_ext_info(&machine, empty_slot);
+    CHECK(empty_info.cans[0].is_empty);
+    CHECK(empty_info.cans[0].material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL);
+
+    DevAmsTray unknown_slot = machine.parse_vt_tray(json::parse(R"({"id": "254"})"));
+    CHECK_FALSE(unknown_slot.is_empty);
+
+    AMSinfo unknown_info;
+    unknown_info.parse_ext_info(&machine, unknown_slot);
+    CHECK_FALSE(unknown_info.cans[0].is_empty);
+    CHECK(unknown_info.cans[0].material_state == AMSCanType::AMS_CAN_TYPE_VIRTUAL);
+}

tests/slic3rutils/test_device_manager_integration.cpp

@@ -3,6 +3,8 @@
 #include <slic3r/GUI/DeviceCore/DevManager.h>
 #include <slic3r/GUI/DeviceManager.hpp>
 #include <libslic3r/AppConfig.hpp>
+#include <libslic3r/PresetBundle.hpp>
+#include <libslic3r/PrintConfig.hpp>
 #include <slic3r/Utils/NetworkAgent.hpp>
 #include <slic3r/Utils/OrcaCloudServiceAgent.hpp>
 #include <slic3r/Utils/OrcaPrinterAgent.hpp>
@@ -273,3 +275,52 @@ TEST_CASE("Orca per-command AMS gate requires fms and the advertised command", "
     obj->printer_agent_id = "bbl";
     CHECK(obj->orca_ams_command_supported("print.anything"));
 }
+
+// The AMS dialogs resolve their filament list from the connected device's model. OrcaSonar's
+// model id is optional (the agent falls back to "orcasonar"), so the resolver must stand in
+// with the selected printer profile instead of yielding no model at all.
+TEST_CASE("Filament printer model resolution falls back to the selected profile", "[DeviceManager][integration]")
+{
+    PresetBundle bundle;
+
+    VendorProfile qidi("Qidi");
+    qidi.name = "Qidi";
+    VendorProfile::PrinterModel model;
+    model.model_id = "Qidi-Q1Pro";
+    model.name     = "Qidi Q1 Pro";
+    qidi.models.push_back(model);
+    bundle.vendors.emplace(qidi.id, qidi);
+
+    // A vendor model id the device reported resolves through the vendor catalog.
+    CHECK(resolve_filament_printer_model("Qidi-Q1Pro", &bundle) == "Qidi Q1 Pro");
+
+    // The OrcaSonar fallback id has no vendor model; the selected profile stands in.
+    CHECK(resolve_filament_printer_model("orcasonar", &bundle).empty());
+    bundle.printers.get_selected_preset().config.set_key_value("printer_model", new ConfigOptionString("Generic Klipper Printer"));
+    CHECK(resolve_filament_printer_model("orcasonar", &bundle) == "Generic Klipper Printer");
+    CHECK(resolve_filament_printer_model("", &bundle) == "Generic Klipper Printer");
+
+    CHECK(resolve_filament_printer_model("orcasonar", nullptr).empty());
+}
+
+// The per-tray K/N records are Bambu firmware's flow-dynamics calibration. Agents with no
+// printer-side records must not offer the AMS K/N controls (they would show a synthesized
+// default and then refuse to confirm it).
+TEST_CASE("Flow-dynamics K/N is offered for Bambu agents only", "[DeviceManager][integration]")
+{
+    MachineObject bbl(nullptr, nullptr, "test", "bbl-device", "127.0.0.1");
+    bbl.printer_agent_id = "bbl";
+    CHECK(bbl.supports_extrusion_cali());
+
+    MachineObject orca(nullptr, nullptr, "test", "orca-device", "127.0.0.1");
+    orca.printer_agent_id = "orca";
+    CHECK_FALSE(orca.supports_extrusion_cali());
+
+    MachineObject moonraker(nullptr, nullptr, "test", "moonraker-device", "127.0.0.1");
+    moonraker.printer_agent_id = "moonraker";
+    CHECK_FALSE(moonraker.supports_extrusion_cali());
+
+    // No agent id predates the agent split and keeps the Bambu path.
+    MachineObject legacy(nullptr, nullptr, "test", "legacy-device", "127.0.0.1");
+    CHECK(legacy.supports_extrusion_cali());
+}