This may be a KSM problem, can you try too add 'radeon.modeset=0' to the kernel line in grub.
** Package changed: ubuntu => xserver-xorg-video-ati (Ubuntu) -- Ubuntu Lucid doesn't start after installing https://bugs.launchpad.net/bugs/563811 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-ati 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