backtrace borderless cgroups clang cmake config dejavu deuteranope dir distros dmabuf downscaler downscaling fullscreen gcc gnif imgui ini kvmfr laggy libdecor libvirt linux LookingGlass memballoon mingw mipmapping modprobe msys multisampling Nvidia overlayed pacman passthrough pre protanope QEMU radeon realtime renderer repo runtime submodule submodules systemd toolchain tritanope tunable udev UEFI uncheck uncomment Unigine unix upscaled upscaler upscales upscaling VM vsync wayland xdg xyene