Seems to be a recent issue caused by the Nvidia drivers. A crash is occurring in libGL.so which will cause Compiz to not run.
>From CurrentDmsg.txt: [ 16.486256] compiz[2361]: segfault at 18 ip 00007f1be7185350 sp 00007fff286a8f10 error 4 in libGL.so.1.2.0[7f1be7148000+63000] Not much we can do about this since libGL.so is in the Nvidia binary. ** Also affects: nvidia-graphics-drivers-331 (Ubuntu) Importance: Undecided Status: New ** Changed in: compiz (Ubuntu) Status: Confirmed => Triaged ** Changed in: compiz (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1360024 Title: Compiz crashes after latest update. Desktop environment completely inaccessible To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1360024/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp