I just upgraded Ubuntu to 12.04 from 11.10. My screen resolution is now stuck at 640x480, and xrandr shows:
Screen 0: minimum 320 x 200, current 640 x 480, maximum 8192 x 8192 DVI-I-1 connected 640x480+0+0 (normal left inverted right x axis y axis) 376mm x 301mm 640x480 60.0* 720x400 70.1
I normally have a much higher screen resolution.
I have an Nvidia video card, and I had the restricted drivers installed before the upgrade. When I attempt to install Additional Drivers, I see this dialog, which doesn't seem right:
Also when I type "jockey-text --list", I get nothing.
What might have gone wrong, and how I fix it?