Re: "screen frozen, but mouse pointer moves" bug
I have the problem also. I have a Asus P4S533 motherboard (SiS645DX chipset), and a Leadtek Winfast Ti4600, and kernel version 2.6.7.
strawks has given me an idea, I'll try running X under GDB (GNU Debugger), and see if this reveals anymore information. strace isn't detailed enough, it only logs calls from user space to the kernel.
I'll let you know how I get on.