This warning message refers to a particular window, by window ID, so just posting the warning message is not very useful because it does not tell you which program Compiz is talking about.
Eg, for me: compiz (core) - Warn: failed to receive ConfigureNotify event on 0x5c00003 If I run "xwininfo -id 0x5c00003" in a terminal, I see that Compiz is referring to Rhythmbox. Since I often close the main Rhythmbox window (and the process stays running in the background), it could be a race condition that happens just as the window closes. The warning by itself is pretty harmless. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/877505 Title: compiz (core) - Warn: this should never happen. you should probably file a bug about this. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/877505/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
