Hi Brice,
1. The crash is not easy to reproduce. It occurs once or twice a day
on Debian unstable, all packages upgraded on 20071203.
2. I have not switched between "text" VTs and X VT before a crash.
3. "page table error" appears only after a crash.
Now I realize that the log file I had supplied is from gdm
restart attempt after a crash. I am searching how to disable
gdm automatic restarts. I will supply more information
if I catch a crash and its log file.
How to allow gdm startup at boot and disable gdm or X.org
restarts after a crash?