Crash woes- but what causes this?

[expohirma]

I have recently tried Knoppix for the first time, and I must say, it is impressive. I'm liking it much more than windows. However, there is a problem. The first time I loaded it, it worked pretty well for about an hour, and then it crashed to reboot. Now, it crashes in under 8 minutes from loadup. I ran memtest86 and my memory is okay. Knoppix doesn't report any error messages in loadup.

Currently:
Zoomlink modem
256mb ram
sis300 video card
1 cd-rw (Que!, I think.)
2 HDD- one maxtor(40), one seagate (80)

Even knoppix failsafe will crash my computer no matter what I do. What's the source of my woes?
Thanks

[rickenbacherus]

Try booting like so:

knoppix testcd

It should return some thing like: "everything looks OK"

If testcd is ok then tell us what happens exactly when it crashes. Does it freeze or simply reboot on its own?

[expohirma]

Testcd reports everything looks OK, but when I shut down, I did notice this error (Mostly correct, some parts a bit paraphrased):
sisfb: Fatal error: unable to reserve framebuffer memory.
sisfb: Is there another framebuffer driver active?
sisfb.o: init_module: No such device
This can be caused by incorrect module parameters including invalid IO or IRQ parameters.
insmod sis failed.

This popped up just before the graphics part loaded.