Yay! It looks like xserver-xorg-video-ati 1:6.6.2-0ubuntu3 fixed the problem:
* Fix radeon aperture size check that was causing hangs and crashes on
RN50, M6, M7 with 8/16/32(??) MBs of VRAM:
- 08_radeon_fix_aperture_size_check.diff
Thanks to Ben H., Dave Airlied and Michel Danzer for their constant support.
-- Fabio M. Di Nitto <email address hidden> Tue, 03 Oct 2006 09:11:47 +0200
My xrandr stress test (toggling between dual-head and clone modes many times in a row) failed to cause a freeze.
Yay! It looks like xserver- xorg-video- ati 1:6.6.2-0ubuntu3 fixed the problem:
* Fix radeon aperture size check that was causing hangs and crashes on fix_aperture_ size_check. diff
RN50, M6, M7 with 8/16/32(??) MBs of VRAM:
- 08_radeon_
Thanks to Ben H., Dave Airlied and Michel Danzer for their constant support.
-- Fabio M. Di Nitto <email address hidden> Tue, 03 Oct 2006 09:11:47 +0200
My xrandr stress test (toggling between dual-head and clone modes many times in a row) failed to cause a freeze.