It ends up that 'radeon.new_pll=0' didn't really change the behavior. The screen seemed to flicker just as much.
Bryce, 'radeon.modeset=0' really did cause the problem to completely disappear. Note that this behavior was new from at most a couple of weeks ago, at the beginning of March this system was running fine with modesetting enabled and no flickering. Attached is the Xorg.0.log when modesetting is disabled. ** Attachment added: "Xorg.0.no_modeset.log" http://launchpadlibrarian.net/41609331/Xorg.0.no_modeset.log -- [RV515] [LENOVO T60] external screen display shows "shivering", horizontal refresh offset https://bugs.launchpad.net/bugs/541501 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
