I can also restart lightdm from vt and I've tried with older kernels (like linux-image-3.5.0-21-generic) but no luck.
It crash every 1-3 hours on various actions like scrolling in chromium, virtual desktop switching, opening a terminal...
I'll see if I can find a pattern.
I have the same bug on a lenovo X61 with lastest raring updates:
00:02.0 VGA compatible controller: Intel Corporation 82G965 Integrated Graphics Controller
I can also restart lightdm from vt and I've tried with older kernels (like linux-image- 3.5.0-21- generic) but no luck.
It crash every 1-3 hours on various actions like scrolling in chromium, virtual desktop switching, opening a terminal...
I'll see if I can find a pattern.