Thanks for the speedy reply. It appears, based on comment 2, that this is indeed not window manager-based but rather a problem with the ATI drivers. I'm going to go ahead and reassign.
Other possibilities are bad decoding libraries but I doubt it as you tried with both Totem (gstreamer) and VLC (ffmpeg). ** Package changed: compiz (Ubuntu) => xserver-xorg-video-ati (Ubuntu) ** Changed in: xserver-xorg-video-ati (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati in Ubuntu. https://bugs.launchpad.net/bugs/961124 Title: Choppy video playback To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/961124/+subscriptions _______________________________________________ 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