I have exactly the same problem with an Acer 5755G laptop: Ubuntu 11.10 x64, nVidia Geforce 540M, integrated Intel® HD Graphics 3000, nvidia-current 280.13-0ubuntu6.
After running nvidia-xconfig X won't start anymore. In my Xorg.0.log I also get:
(EE) No devices detected.
Fatal server error:
no screens found
I have exactly the same problem with an Acer 5755G laptop: Ubuntu 11.10 x64, nVidia Geforce 540M, integrated Intel® HD Graphics 3000, nvidia-current 280.13-0ubuntu6.
After running nvidia-xconfig X won't start anymore. In my Xorg.0.log I also get:
(EE) No devices detected.
Fatal server error:
no screens found
Bug #660596 looks similar.