Ubuntu
xserver-xorg-video-ati package

  1. Bug #195051
  2. Comment #106

Comment 106 for bug 195051

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

Hi Bryce and all,

I'm very sorry that I am reporting so late on this but I didn't have the time to upgrade to Intrepid on my Thinkpad.
Now that I did, I am sorry to report that the freezing problem still exist.

BUT there is a workaround for anyone who's affected (pointed ou to me by Alex Deucher):
You need to set AGP mode to 1 in your Xorg configuration file.

Just add this line to the Section "Device" of your /etc/X11/xorg.conf

 Option "AGPMode" "1"

I have added my xorg.conf for reference.

Unfortunately, it seems there can not be done much about this problem by Ubuntu.
Quoting Alex Deucher:
"There are just too many combinations of agp cards and chipsets that only work at specific settings (some only work at 1x, others only work at 4x or 8x, etc.). We've tried both defaults in the driver, but someone's combination always breaks."