Ubuntu
xserver-xorg-video-ati package

  1. Bug #195051
  2. Comment #35

Comment 35 for bug 195051

Revision history for this message
Kris (kris333) wrote : Re: X freezes in drmCommandWrite() when Compiz is enabled on ATI Radeon Mobility 9600

Just a heads-up: I filed a similar bug (at Bryce's suggestion) at https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/206845

I'm running a similar setup (ThinkPad with ATI Radeon Mobility 9000), but I'm getting some different output in the backtrace. I've also discovered that the freeze with mouse activity can be reproduced on my system by switching to the "Braid" screensaver in Gnome Screensaver Preferences. Nick, could you give it a try?

When I switch to Braid, everything but the mouse locks up. Strangely, the system will recover if I choose a different screensaver (even though the system appears unresponsive to clicks). This freeze will persist anywhere from 5 minutes to an hour and then POOF, the system is again responsive with the new screensaver selected. I should also warn that I get broken pipe if I select random screensaver and Braid happens to come up (that's how I stumbled across the problem with Braid in the first place).

Anyway, all the backtraces I managed to collect during the "freeze" ended with problems in Dispatch() in dix/dispatch.c and dix/main.c. No problems with drmCommandWrite() here.