On my MythBuntu box i have an nVidia Quadro 4 graphics card. I installed the restricted driver through Applications > System > Hardware Drivers and rebooted. Now I get two resolution options: 640x480 and 320x240.
I tried installing envyng:
sudo apt-get install envyng-gtk
I had envyng install the nVidia driver based on automatic hardware detection, and i rebooted. envyng removed the drivers installed by the Ubuntu Restricted Drivers application and instead installed another driver, but the end result was the same; only the two resolutions.
I installed the nVidia graphics control panel to see if that would change anything:
sudo apt-get install nvidia-settings
But no change - only the two resolution settings.
I tried installing, uninstalling and reinstalling the drivers using Ubuntu's Restricted HW tool and envyng several times, but no luck.
Some basic information:
~$ cat /etc/lsb-release
~$ uname -a
Linux mediBuntu-Frontend 2.6.24-19-generic #1 SMP Fri Jul 11 23:41:49 UTC 2008 i686 GNU/Linux
~$lspci | grep VGA
01:00.0 VGA compatible controller: nVidia Corporation NV28GL [Quadro4 980 XGL] (rev a1)
My system is up to date and I do have a working internet connection.
The graphics card has two DVI outputs and I'm using a DVI->VGA adapter to connect to my monitor (a Philips 170B LCD monitor) via a KVM switch, so I'm guessing that corrupted EDID info is not the issue (since the analog VGA monitor input doesn't send out any EDID info back to the graphics card?).