Hi, same problem here. I am using clean install od Kubuntu 10.10 with latest updates. After boot, the compositing is temporarily disabled. I am able to resume the compositing from KDE Control Center a then everything is working fine. After some random time, when I use some KWin effect (Tab-switching , desktop switching, desktop grid, ...), KDE hangs and syslog become flooded by messages described in this bug.
HW : HP 2230s, Intel GM45 chipset xserver-xorg-video-intel 2:2.12.0-ubuntu5 Kubuntu 10.10 64bit -- [gm45] Running piglit/occlusion-query-discard locks GPU https://bugs.launchpad.net/bugs/634683 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs