Comment # 5 on bug 103968 from Michel Dänzer

(In reply to Odo Wolbers from comment #4)
> ldd /usr/lib/xorg/modules/libglamoregl.so 
> 	[...]
> 	libgbm.so.1 => /usr/local/lib/libgbm.so.1 (0x00007f4d676cd000)
>       [...]
> 	libdrm.so.2 => /usr/local/lib/libdrm.so.2 (0x00007f4d65e5a000)

Does removing /usr/local/lib/libgbm.so* and /usr/local/lib/libdrm.so* help? If
not, look for more leftovers under /usr/local/.