since monday I'm struggling with this problem as well, I've discovered this thread quite early so I tested about everything that was listed in here including:
- Option "NoMTRR" in xorg.conf
- disabling AGP in xorg.conf (can't disable it in the BIOS, no such option)
- switching from xorg 6.8 to 6.7 (and back cause it didn't help)
- changing from DVI input to Analog (I have a Dell 2001FP Display which seems to have problems with nvidia drivers cause they try to (write)access some stuff in the screen firmware which is read only)
- changing to nv driver
- changing to Scitech SNAP driver (commercial)
- recompiling all nvidia driver stuff & the kernel
- Gnome & OpenBox WM, both lock
BTW first Xorg worked perfectly well but after some weeks I got another strange problem, the TT font rendering was completely broken, see my thread here:
http://forums.gentoo.org/viewtopic.php?t=260102
Starting with that I did disable RenderAccel which actually did help resolving that problem. BTW I do get the lockup as well if I reenable it.
so, I'm really pissed by X once again. Like most in this thread I guess
Will check the bug reportings soon, I really wonder why that happens.
Anyone knows how I can completely disable truetype? If I simply uncomment the TrueType option in the config my box stops as soon as I try to enter the username in GDM
BTW my gnome locks almost immediately after I did a login. Sometimes it can't even load all the gnome stuff correctly before it locks up.
In the beginning of the problem earlier this week it took at least a few minutes to lock.