The problem solved by deleting Compiz Fusion from System - Preferences - Startup Applications. On my desktop Compiz Fusion didn't exist in System - Preferences - Startup Applications.
** Changed in: compiz (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/344053 Title: I/O warning : failed to load external entity -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs