Re: "screen frozen, but mouse pointer moves" bug
In my case, disabling AGP seems to have fixed it since I stopped loading the agpgart module. I'm going on 3 days straight now without this problem, All the other options mentioned by toastyx had no effect on it for me either. I'm running kernel 2.6.6, so it seems unlikely to be kernel-based in some way. I do know it would usually freeze if I ran X for several days, but I recall a few occasions where it happened much sooner and it didn't seem to require an X restart to occur. One possible clue: I have a Via KM400 chipset (very similar to the KT400 I understand), so maybe the problem is related to Via chipsets?