Наверно после обновления недавнего, не знаю, перезагрузил вот, ну и вот такое.
Из Xorg.0.log-а:
[ 17.105] (EE) AIGLX error: dlopen of /usr/lib64/dri/r600_dri.so failed (libLLVM-3.1.so: cannot open shared object file: No such file or directory)
[ 17.105] (EE) AIGLX: reverting to software rendering
[ 17.105] (II) AIGLX: Screen 0 is not DRI capable
[ 17.152] (EE) AIGLX error: dlopen of /usr/lib64/dri/swrast_dri.so failed (libLLVM-3.1.so: cannot open shared object file: No such file or directory)
[ 17.152] (EE) GLX: could not load software renderer
[ 17.152] (II) GLX: no usable GL providers found for screen 0
А файлы-то на месте (есть по ссылкам):
/usr/lib64/dri/r600_dri.so -> ../mesa/r600g_dri.so
/usr/lib64/dri/swrast_dri.so -> ../mesa/swrastg_dri.so
Версии:
media-libs/mesa-9.2.1
x11-base/xorg-server-1.14.3-r2
x11-base/xorg-drivers-1.14
x11-drivers/xf86-video-ati-7.2.0
sys-devel/llvm-3.1-r2