Comment 144 for bug 626974

Darik Horn, thanks for your advise, but still not working.

petka@petka-ubuntu-pc:~$ cat /var/log/Xorg.1.log
....
[ 49.159] (II) NVIDIA(0): Initialized GART.
[ 49.178] (EE) NVIDIA(0): Failed to allocate/map the primary surface!
[ 49.181]
Fatal server error:
[ 49.183] AddScreen/ScreenInit failed for driver 0
[ 49.183]
[ 49.183]
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 49.183] Please also check the log file at "/var/log/Xorg.1.log" for additional information.
[ 49.183]
[ 49.369] ddxSigGiveUp: Closing log

petka@petka-ubuntu-pc:~$ cat /etc/X11/xorg.conf

Section "Screen"
 Identifier "Default Screen"
 DefaultDepth 24
 Option "AddARGBGLXVisuals" "True"
EndSection

Section "Module"
 Load "glx"
EndSection

Section "Device"
 Identifier "Default Device"
 Driver "nvidia"
 Option "NoLogo" "True"
EndSection