From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020408

Description of problem:
2 seperate situations. 
1.  Having nvidia drivers (verisons NVIDIA_GLX-1.0-312 NVIDIA_kernel-1.0-3123)
loaded and the news read pan running caused a lock up withing a few minutes. 
The newsgroups were common text newgroups. This loacked up X,  I was still able
to ssh in,  but X would not die and attempts to issue a shutdown -r now resulted
in a hardlock up.  This occured with default kernel and custom kernel.

2.  Loading the module agpgart had machine reboot immediately.  

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Install NVidia drivers and modify XF86Config as suggested.
2. Startx 
3. Open pan and read some news and wait for X to lock up.

1. Install NVidia drivers and modify XF86Config as suggested.
2. Load module agpgart
3. Type Startx 
	

Actual Results:  For issue one X would lock up
For issuse two machine would immediatley reboot.

Expected Results:  X should not have locked up,  or least responded to
ctrl+alt+bkspc

machine should not have rebooted.

Additional info:

Hadrware
athlon 1200 MHz (it has the mem=nopentium flag passed in)
512 MB ram
nvidia card gf2 mx
standard other stuff...

Exact same hardware has run flawlessly with redhat 7.1, 7.2 and 7.3