I have this problem too. Fullscreen mode seems to be the culprit because running mythfrontend windowed (--geometry 1024x768 for example) does not cause X to crash.
GeForce 7100GS -- [Gutsy] mythfrontend crashes on video playback https://bugs.launchpad.net/bugs/137138 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
