I wonder why these messages are printed though, that is debug output that should be off by default. You can check kdebugdialog to make sure debug messages are turned off. The message itself simply states that GL based desktop compositing cannot be done because your driver is not able to do what kwin would like it to.
** Changed in: kdebase-workspace (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/633427 Title: I'm getting lots of errors in ~/.xsession-errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kdebase-workspace/+bug/633427/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs