https://bugs.kde.org/show_bug.cgi?id=499882
--- Comment #84 from John <[email protected]> --- (In reply to Oleg Gorobets from comment #82) > (In reply to John from comment #81) > Both of your GPUs have Vulkan support and are correctly detected by > vulkaninfo. I was interested in GPUs without Vulkan support and the latest > MR was targeting exactly such cases. But why do you have "llvmpipe" reported > as your 3rd GPU? Any idea? Sorry I could not help with a GPU without Vulkan support! As for the 3rd GPU, I don't know! It may be something that Debian 14 does for the moment or Mesa 25.2.6-1 from it does. Or one of these environment variables that I have set for trying out things does: # Number of threads MESA will run with. Should be between 1 and 2 * number of logical cores. OMP_NUM_THREADS=4 # Print debug info about device selection decision-making MESA_VK_DEVICE_SELECT_DEBUG # Forgot what was this for VK_LOADER_LAYERS_ENABLE= # Force use of the threaded renderer. It's unclear if this is the default on Linux too. QSG_RENDER_LOOP=threaded # Enable overlay plane usage, which provide better power efficiency for windowed programs, like video players with this status. KWIN_USE_OVERLAYS=1 GPU-Viewer program also shows it as the 3rd option in its Available Device(s) droptdown and it shows it like this: llvmpipe (LLVM 21.1.6, 256 bits) If I choose (select) it in the drop-down, then all the information below changes to be about it, but it doesn't let me to copy anything from it. In any case it says the same name as in the dropdown, that is a physical device type CPU, it's part of Mesa 25.2.6, driver name: llvmpipe. Maybe it just wants to say that software rendering on the CPU is available too. Other commands that I found out while trying to configure MangoHUD and find a way to force Steam use the integrated GPU, instead of the dedicated (discrete GPU) and their output (after the dotted lines): MESA_VK_DEVICE_SELECT=list vulkaninfo ------------------------------------------------------------- WARNING: [Loader Message] Code 0 : Layer VK_LAYER_MANGOHUD_overlay_x86_64 uses API version 1.3 which is older than the application specified API version of 1.4. May cause issues. [2025-11-30 00:06:23.702] [MANGOHUD] [warning] [gpu_fdinfo.cpp:419] Intel i915 gt dir: failed to open /sys/bus/pci/devices/0000:00:02.0/drm/card0/gt/gt0/throttle_reason_status selectable devices: GPU 0: 1002:6900 "AMD Radeon R5 M465 Series (RADV ICELAND)" discrete GPU 0000:01:00.0 GPU 1: 8086:5917 "Intel(R) UHD Graphics 620 (KBL GT2)" integrated GPU 0000:00:02.0 GPU 2: 10005:0 "llvmpipe (LLVM 19.1.7, 256 bits)" CPU 0000:00:00.0 switcherooctl list ------------------------------------------------------------- Device: 0 Name: Intel® UHD Graphics 620 Default: yes Discrete: no Environment: DRI_PRIME=pci-0000_00_02_0 VK_LOADER_DRIVERS_SELECT=*intel* Device: 1 Name: Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon™ R7 M260/M265 / M340/M360 / M440/M445 / 530/535 / 620/625 Mobile] Default: no Discrete: yes Environment: DRI_PRIME=pci-0000_01_00_0 VK_LOADER_DRIVERS_SELECT=*radeon* -- You are receiving this mail because: You are watching all bug changes.
