I have exactly the same problem with Intel HD graphics and core i5-650 processor. Freezes sometimes, same error messages. I had to switch to Xrender. With Xrender, there is no more freezes, but all opengl-related effects are disabled :(.
I installed the final version of Kubuntu Maverick from scratch, and the problem remains. I have no clue to solve this problem, I guess intel graphics driver is buggy... -- kde desktop effects disables by default and desktop freezes when enabled https://bugs.launchpad.net/bugs/653093 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp