The breakage was introduced in xorg-server 2:1.9.99.901+git20110131.be3be758-0ubuntu6.
Seems like the vboxvideo DRI driver fails to load and then X crashes while trying to load a driver from the alternates dir.
A workaround is to just remove /usr/lib/dri/vboxvideo_dri.so
The breakage was introduced in xorg-server 2:1.9.99. 901+git20110131 .be3be758- 0ubuntu6.
Seems like the vboxvideo DRI driver fails to load and then X crashes while trying to load a driver from the alternates dir.
A workaround is to just remove /usr/lib/ dri/vboxvideo_ dri.so