17.18.1. kmscube
./build-buildroot --config-fragment buildroot_config/kmscube
Outcome: a colored spinning cube coded in OpenGL + EGL takes over your display and spins forever: https://www.youtube.com/watch?v=CqgJMgfxjsk
It is a bit amusing to see OpenGL running outside of a window manager window like that: https://stackoverflow.com/questions/3804065/using-opengl-without-a-window-manager-in-linux/50669152#50669152
TODO: it is very slow, about 1FPS. I tried Buildroot master ad684c20d146b220dd04a85dbf2533c69ec8ee52 with:
make qemu_x86_64_defconfig printf " BR2_CCACHE=y BR2_PACKAGE_HOST_QEMU=y BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE=n BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y BR2_PACKAGE_HOST_QEMU_VDE2=y BR2_PACKAGE_KMSCUBE=y BR2_PACKAGE_MESA3D=y BR2_PACKAGE_MESA3D_DRI_DRIVER_SWRAST=y BR2_PACKAGE_MESA3D_OPENGL_EGL=y BR2_PACKAGE_MESA3D_OPENGL_ES=y BR2_TOOLCHAIN_BUILDROOT_CXX=y " >> .config
and the FPS was much better, I estimate something like 15FPS.
On Ubuntu 18.04 with NVIDIA proprietary drivers:
sudo apt-get instll kmscube kmscube
fails with:
drmModeGetResources failed: Invalid argument failed to initialize legacy DRM
See also:
Tested on: 2903771275372ccfecc2b025edbb0d04c4016930