Comment 98 for bug 447892

I followed the instructions at https://wiki.ubuntu.com/X/Troubleshooting/Freeze#How%20to%20Get%20a%20Batchbuffer%20Dump%20%28-intel%20only%29 and http://intellinuxgraphics.org/how_to_report_bug.html and I got the attached batchbuffer dumps.

In my case, the mouse cursor is also frozen when X freezes.

System environment:
-- chipset: 855GM
-- system architecture: 32-bit
-- xf86-video-intel: 2:2.9.1-1ubuntu1
-- xserver: 2:1.7.3.902-1ubuntu8
-- mesa: 7.7-0ubuntu6
-- libdrm: 2.4.17-0ubuntu1
-- kernel: 2.6.32-10-generic
-- Linux distribution: Ubuntu Lucid Lynx 10.04 dev branch
-- Machine or mobo model: Asus M5000 (laptop)
-- Display connector: LVDS (VGA available, but not used)
     LVDS has the native resolution of 1024x768

Reproducing steps:
Log in to X. Either wait for variable time, browse the system menus or start some application.

SSH works until I try to copy the files from /sys/kernel/debug/dri/0/ .
At that time the system crashes so badly that even sysrq stops responding.
The SSH-sessions die at the same time.

Additional info:

Without logging in to X, the computer is fully stable.