我无法让硬件加速与英特尔高清显卡 5000 (Core i5/Sandy Bridge) 配合使用。它在 13.10 上运行正常，但升级到 14.04 似乎破坏了某些功能。
加载 i965 驱动程序时出现问题：undefined symbol: drm_intel_get_reset_stats
这是带有 glxinfo 的完整跟踪。
toilal@nas:~$ LIBGL_DEBUG=verbose glxinfo|grep renderer
libGL: screen 0 does not appear to be DRI3 capable
libGL: pci id for fd 4: 8086:0152, driver i965
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/tls/i965_dri.so
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
libGL error: dlopen /usr/lib/x86_64-linux-gnu/dri/i965_dri.so failed (/usr/lib/x86_64-linux-gnu/dri/i965_dri.so: undefined symbol: drm_intel_get_reset_stats)
libGL: OpenDriver: trying ${ORIGIN}/dri/tls/i965_dri.so
libGL: OpenDriver: trying ${ORIGIN}/dri/i965_dri.so
libGL error: dlopen ${ORIGIN}/dri/i965_dri.so failed (${ORIGIN}/dri/i965_dri.so: cannot open shared object file: No such file or directory)
libGL: OpenDriver: trying /usr/lib/dri/tls/i965_dri.so
libGL: OpenDriver: trying /usr/lib/dri/i965_dri.so
libGL error: dlopen /usr/lib/dri/i965_dri.so failed (/usr/lib/dri/i965_dri.so: cannot open shared object file: No such file or directory)
libGL error: unable to load driver: i965_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: i965
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/tls/swrast_dri.so
libGL: OpenDriver: trying /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so
libGL: driver does not expose __driDriverGetExtensions_swrast(): /usr/lib/x86_64-linux-gnu/dri/swrast_dri.so: undefined symbol: __driDriverGetExtensions_swrast
libGL: Can't open configuration file /home/toilal/.drirc: No such file or directory.
libGL: Can't open configuration file /home/toilal/.drirc: No such file or directory.
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.4, 256 bits)
答案1
哎哟！好吧，那时我还没用 14.04，但是：
sudo apt-get install --reinstall xserver-xorg-video-intel libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
sudo dpkg-reconfigure xserver-xorg
sudo reboot
也可以修复它！