Quake 3 (again, but different)

[miller]

System Specs:
dual celeron 466Mhz
128M RAM
voodoo3 3000
generic SB compatible
kernel 2.4.12
X 4.1.3 with voodoo DRI

Here's the problem:
After playing Quake 3 for 5-10 seconds, it freezes. This does not happen on the first level, but any other level I try has this problem. About 5-10 seconds into playing the level, the machine freezes. Nothing but a hard reboot will fix it.

I downloaded the game demo pack from loki, and most other OpenGL games also have this problem.

Here's the funny thing:
The Wolfenstein MP test runs great. No hangs whatsoever.

I've been trying to figure out this problem for a long time, but havn't been able to find anyone else who has the same problem. It even used to happen on my old slack install with the 2.2 kernel and X 3.4(?).

[Super Bakemono]

Start an emtpy game. Now don't do anything, just stand there where you spawned. Does it still crash?

[miller]

I didn't have much time before work this morning, but I managed to squeeze in enough time to try this.

I used the first map on the first tier. I stood there for a couple of minutes, and it was fine, but after I started moving, it froze.