Hi Marcin,
I have a Creative Labs Graphics Blaster Riva TNT and I encountered this problem
on both Debian Squeeze (with 2.6.32 kernel) and Linux Mint 12 LXDE (with 3.0
kernel). Symptom: during boot, the screen goes blank (some garbage shown) and
the boot process does not terminate. dmesg shows an endless list of
"PGRAPH_NOTIFY - nSource: PATCH_EXCEPTION, nStatus: INVALID_STATE
PROTECTION_FAULT" errors.

To fix the problem I was using the "nomodeset" kernel booting parameter, then I
found this bug report and I ended up with "nouveau.noaccel=1" which at least
gives me a high definition console.

As far as I understand it correctly, now the problem is solved (i.e.: no need
for nouveau.noaccel=1 anymore), but which kernel version does carry the fixed
nouveau driver?