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Linux: prefer discrete GPU on dual-GPU systems via PRIME environment variables (#12602)

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* Linux: prefer discrete GPU on dual-GPU systems via PRIME environment variables

  Set DRI_PRIME=1 for AMD/nouveau PRIME setups and __NV_PRIME_RENDER_OFFLOAD/__GLX_VENDOR_LIBRARY_NAME for NVIDIA proprietary driver, only when the NVIDIA kernel module is detected. Uses replace=false to respect user overrides.

* Improves usability on Linux. No more double title bar (#12600)

* Fix double title bar on Linux by removing WM decorations for GTK

* wip

* fix

* finish

* address review comment
This commit is contained in:
SoftFever
2026-03-04 22:48:40 +08:00
committed by GitHub
parent d50b4cbf3d
commit 008cfd1f86
1 changed files with 12 additions and 0 deletions
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src/OrcaSlicer.cpp
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@@ -88,6 +88,7 @@ using namespace nlohmann;
#ifdef __WXGTK__
#include <X11/Xlib.h>
#include <unistd.h>
#endif
#ifdef SLIC3R_GUI
@@ -1191,6 +1192,17 @@ int CLI::run(int argc, char **argv)
// mode forces software rendering, which works reliably on all backends.
::setenv("WEBKIT_DISABLE_COMPOSITING_MODE", "1", /* replace */ false);
// On Linux dual-GPU systems, request the high-performance discrete GPU.
// DRI_PRIME=1 handles AMD and nouveau (open-source NVIDIA) PRIME setups.
::setenv("DRI_PRIME", "1", /* replace */ false);
// For NVIDIA proprietary driver PRIME render offload, set additional variables.
// Only set if the NVIDIA kernel module is loaded to avoid breaking systems without NVIDIA.
if (::access("/proc/driver/nvidia/version", F_OK) == 0) {
::setenv("__NV_PRIME_RENDER_OFFLOAD", "1", /* replace */ false);
::setenv("__GLX_VENDOR_LIBRARY_NAME", "nvidia", /* replace */ false);
}
// Also on Linux, we need to tell Xlib that we will be using threads,
// lest we crash when we fire up GStreamer.
XInitThreads();