Maybe the problem is the video intel driver that doesn't work well with intel 855GM as reported in this bug
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video- intel/+bug/221316 a detailed workaround is reported here (message #74), it worked for me http://ubuntuforums.org/showthread.php?t=767833&highlight=crash+totem+avi&page=8 -- [Hardy] System Crash when playing FLV file https://bugs.launchpad.net/bugs/226350 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