grep EE /var/log/Xorg.0.log
[ 392.360] Current Operating System: Linux myhost 3.1.8-1-ARCH #1 SMP PREEMPT Sat Jan 7 08:59:43 CET 2012 x86_64
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 392.370] (II) Loading extension MIT-SCREEN-SAVER
[ 393.110] (EE) NVIDIA(0): Failed to initialize the display subsystem for the NVIDIA
[ 393.110] (EE) NVIDIA(0): graphics device!
[ 393.110] (EE) NVIDIA(0): Failed to get supported display device(s)
[ 393.110] (EE) NVIDIA(0): Failed to initialize dac HAL
[ 393.111] (EE) Screen(s) found, but none have a usable configuration.
Последний драйвер, не тестинг репы, grub2_uefi_x86-64.
Если делать startx экран вырубается и приходится перезагружать на ощупь.