Ubuntu
xserver-xorg-video-ati package

  1. Bug #47775
  2. Comment #12

Comment 12 for bug 47775

Revision history for this message
In , Marius Gedminas (mgedmin) wrote :

Confirming. X.org 7.0.0 often freezes my laptop (T42, Radeon Mobility 7500) if
I use MergedFB and switch from dual-head mode to clone mode. I use xrandr for
the switch rather than Ctrl+Alt+[+/-]. The freeze is solid -- even Alt+SysRq
doesn't work. When the machine is frozen, I see a strange picture on the
external monitor: http://mg.pov.lt/P6010010.JPG. Not every xrandr call causes a
lockup, but three or four tries are enough to reproduce the problem. Sometimes
xrandr succeeds, but the laptop lock up suddenly after 10-15 minutes when I'm
not doing anything in particular.

My xorg.conf is already linked from this bug report ;) I've used it in the past
with X.org 6.9 for quite a long time with no problems (well, with only minor
problems, no lockups).

I've also filed this bug in Ubuntu as https://launchpad.net/bugs/47775.

I'll try to disable DynamicClocks and see if it helps.