I have been experiencing the same issue since switching to the radeon driver recently (when I upgraded to Jaunty). Using a Thinkpad T60 w/ X1400 mobility chipset, the built-in screen, and an external LCD monitor.
I get the flicker on both screens, always bounded around the cursor. The upper-left of the flickering region appears to be at the upper-left corner of the cursor, and the region never appears to extend significantly beyond the cursor. There appear to be rectangular 'regions' of the screen in which this consistently happens, when it does happen; I have not been able to determine if they are consistent between applications or between server restarts. Putting the cursor anywhere in the region triggers the behavior, but the exact pattern varies depending on where in the region it falls. The region I am testing with at the moment does *not* appear to shift when the visual under it shifts (for example, scrolling the browser window I'm typing in so that either bug text, blank page, or text entry box is under the region). Rather, it stays the same place and size, and the flicker pattern remains the same for any given spot in it. It *does* appear that the exact shade of the flicker may depend on what color the underlying visual is, however. For the benefit of anyone looking for "ATI flicker" issues: this is almost certainly not the same as bug #351423; neither switching to XAA from EXA nor setting the "MigrationHeuristic" option to "greedy" appear to make any noticeable difference in the behavior, and the symptoms are not particularly similar. Including Xorg.0.log, will include lspci output in the next comment. ** Attachment added: "Xorg.0.log" http://launchpadlibrarian.net/27063445/Xorg.0.log -- [X1600] Dual-head flickers https://bugs.launchpad.net/bugs/289216 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
