Comment 78 for bug 660596

I believe I have the same problem with an Acer 5755G laptop (nVidia 540m) and Ubuntu 11.10 64bit.
After a fresh install I get:

$ glxgears
Xlib: extension "GLX" missing on display ":0".
Error: couldn't get an RGB, Double-buffered visual

$ glxinfo
name of display: :0
Xlib: extension "GLX" missing on display ":0". (this line 5 times)

Error: couldn't find RGB GLX visual or fbconfig

Xlib: extension "GLX" missing on display ":0". (this line 7 more times)

When I run NVIDIA X Server Settings it tells me: You do not appear to be using the NVIDIA X driver. Please edit your X configuration file (just run `nvidia-xconfig` as root), and restart the X server.

After I run sudo nvidia-xconfig and reboot X won't start anymore. I have tried both nvidia-current 280.13-0ubuntu6 and the latest available from nVidia website.