I forgot to mention that I have two graphic cards in this system which might be the cause of the problem:
$ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: nVidia Corporation GF106 [GeForce GT 555M] (rev a1)
Actually it's not 555M (I wish it was), only 540M.
I also found bug #643895 which is a similar problem. In my Xorg.0.log I also have:
(EE) No devices detected. Fatal server error: no screens found
I forgot to mention that I have two graphic cards in this system which might be the cause of the problem:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: nVidia Corporation GF106 [GeForce GT 555M] (rev a1)
Actually it's not 555M (I wish it was), only 540M.
I also found bug #643895 which is a similar problem.
In my Xorg.0.log I also have:
(EE) No devices detected.
Fatal server error:
no screens found