Comment 13 for bug 982626

Actually this has started happening again for me. I fresh installed 12.04, updated it with -proposed enabled, then it was good for a while, now every time I log in, compiz crashes and leaves me a nautilus-only desktop. Opening a folder, then running a shell script containing 'unity --replace' gets things working again.

Syslog contains this:

Sep 12 07:36:29 nymphaea kernel: [ 10.482021] show_signal_msg: 39 callbacks suppressed
Sep 12 07:36:29 nymphaea kernel: [ 10.482024] compiz[2242]: segfault at 0 ip 0000000041919ddd sp 00007fffabc7f378 error 4 in gl1ZmZi1 (deleted)[41918000+2000]
Sep 12 07:36:29 nymphaea rtkit-daemon[2020]: Successfully made thread 2335 of process 2335 (n/a) owned by '1000' high priority at nice level -11.
Sep 12 07:36:29 nymphaea rtkit-daemon[2020]: Supervising 8 threads of 3 processes of 2 users.
Sep 12 07:36:29 nymphaea pulseaudio[2335]: [pulseaudio] pid.c: Daemon already running.
Sep 12 07:36:29 nymphaea gnome-session[2176]: WARNING: Application 'compiz.desktop' killed by signal
Sep 12 07:36:29 nymphaea gnome-session[2176]: WARNING: App 'compiz.desktop' respawning too quickly
Sep 12 07:36:29 nymphaea gnome-session[2176]: CRITICAL: We failed, but the fail whale is dead. Sorry....
Sep 12 07:36:31 nymphaea kernel: [ 12.478040] compiz[2336]: segfault at 0 ip 0000000040b39ddd sp 00007fff0234c598 error 4 in gla7Cw8d (deleted)[40b38000+2000]
Sep 12 07:36:31 nymphaea gnome-session[2176]: WARNING: App 'compiz.desktop' respawning too quickly
Sep 12 07:36:31 nymphaea gnome-session[2176]: WARNING: Application 'compiz.desktop' killed by signal
Sep 12 07:36:31 nymphaea gnome-session[2176]: WARNING: App 'compiz.desktop' respawning too quickly

Is there some way that this can be investigated? It happens reliably on login at the moment. The trouble is, I don't know what changed to start causing it again.