If it is correct that this regression started April 10th, that roughly coincides to when we brought in the 6.13.0 version of -ati.
It would be helpful of those of you able to reproduce this problem could downgrade to version 1:6.12.192-2ubuntu2 and verify the issue goes away. If it does not go away, then the bug is not likely to be in xserver-xorg-video-ati. After that, the next thing to check would be to boot an earlier kernel from before April 10th and see if that makes the issue go away.
In either case, I think this bug report should be sent upstream, as the changes we've added to ubuntu are almost entirely cherrypicks from upstream, so this is probably relevant to them.
If it is correct that this regression started April 10th, that roughly coincides to when we brought in the 6.13.0 version of -ati.
It would be helpful of those of you able to reproduce this problem could downgrade to version 1:6.12.192-2ubuntu2 and verify the issue goes away. If it does not go away, then the bug is not likely to be in xserver- xorg-video- ati. After that, the next thing to check would be to boot an earlier kernel from before April 10th and see if that makes the issue go away.
In either case, I think this bug report should be sent upstream, as the changes we've added to ubuntu are almost entirely cherrypicks from upstream, so this is probably relevant to them.