Comment 30 for bug 963633

I also had this bug on a thinkpad x220 i7 sandy bridge tablet with integated intel graphics after doing an upgrade from 10.10 to 12.04 beta today Mar 26.

I ran "DISPLAY=:0.0 unity --reset" from vt2 and after a bunch of messages unity 3d started up correctly and continued to work after a relog.

Though in addition to warning messages there was a segfault when I ran --reset.

Compiz: 1:09.7.2-0ubuntu1
Unity: 5.8.0-0ubuntu2

(some successful messages)
...
Setting update "run_key"

(compiz:8770) GLib-CRITICAL **: g_source remove: assertion `tag > 0 ' failed

(compiz:8770) GLib-CRITICAL **: g_source remove: assertion `tag > 0 ' failed

(compiz:8770) GLib-CRITICAL **: g_source remove: assertion `tag > 0 ' failed
Segmentation Fault
$