If compiz is hung then a stack trace of the compiz process would be very helpful. To do this...
0. Download and keep a copy of the attached dstack script handy in your home directory. Then when the hang occurs; 1. Switch to a VT (Ctrl+Alt+F1) and log in. 2. sudo ./dstack compiz > compizhang.txt 3. Kill/restart/recover any way you like. 4. Attach compizhang.txt to this bug. ** Attachment added: "dstack" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1035183/+attachment/3255460/+files/dstack ** Package changed: unity (Ubuntu) => compiz (Ubuntu) ** Also affects: compiz Importance: Undecided Status: New ** Changed in: compiz Status: New => Incomplete ** Changed in: compiz (Ubuntu) Status: New => Incomplete -- 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/1035183 Title: Unity/Compiz hangs when screen turns on to show lock screen To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1035183/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : [email protected] Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp

