I can confirm my above comment - I went back to kernel 2.6.34-060634-generic, and all is well. I had also tried the 2.6.36 kernel and continued to have lockups (only) while on battery power.
-- System freezes when running on battery https://bugs.launchpad.net/bugs/662998 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