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@@ -243,7 +243,26 @@ Error OS_X11::initialize(const VideoMode &p_desired, int p_video_driver, int p_a
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// Set DRI_PRIME if not set. This means that Godot should default to a higher-power GPU if it exists.
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// Note: Due to the final '0' parameter to setenv any existing DRI_PRIME environment variables will not
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// be overwritten.
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- setenv("DRI_PRIME", "1", 0);
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+ bool enable_dri_prime = true;
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+ // Check if Nouveau is loaded, we don't want to force dGPU usage with that driver.
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+ if (FileAccess *f = FileAccess::open("/proc/modules", FileAccess::READ)) {
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+ // Match driver name + space
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+ String nouveau_str = "nouveau ";
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+
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+ while (!f->eof_reached()) {
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+ String line = f->get_line();
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+
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+ if (line.begins_with(nouveau_str)) {
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+ enable_dri_prime = false;
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+ break;
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+ }
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+ }
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+ f->close();
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+ memdelete(f);
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+ }
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+ if (enable_dri_prime) {
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+ setenv("DRI_PRIME", "1", 0);
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+ }
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ContextGL_X11::ContextType opengl_api_type = ContextGL_X11::GLES_3_0_COMPATIBLE;
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