X freezing...

[Ben Sheron]

Hi, I'm new here.  I just installed Redhat Linux 9 on my workstation,
with all the packages installed.  The computer is running dual AMD MP
2800s, with 512 MB of RAM.  I installed it fine, but when I started
using it more, I noticed that the X server would freeze, and I wouldn't
be able to move the mouse, or use the keyboard; I just had to shut off
the power.  I ran the update manager, and it installed the 2.4.30-9smp
kernel, which helped at first, but still doesn't make much of a
difference.  Now it seems like every other time I boot up the comp
freezes upon starting Mozilla, Ximian, or just playing some songs with
XMMS.  Is this just an issue with the X server version (4.3.0)? 
Sometimes just Mozilla crashes, and I can simply kill the process.  But
often I have to reboot.

Thanks for any insight.

Ben