Unusable desktops settings with nVidia

Question

I am owner of nVidia GeForce GT 320M and I have two displays: external montior BenQ 1920x1080 and laptop's display 1366x768.

Ubuntu with installed additional hardware drivers recognize my monitors just as a single monitor:

Similar behavior occurred also on 11.10 but Displays dialog wasn't so important as it is in 12.04:

• sticky edges make it painful to move the cursor from one display to another
• when saving a change in Displays dialog or during log in, the following error is displayed:

Displays dialog worked during the installation perfectly. I assume that the problem are nVidia drivers. Output of xrandr:

$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 3286 x 1080, current 3286 x 1080, maximum 3286 x 1080
default connected 3286x1080+0+0 0mm x 0mm
   3286x1080      50.0*

My questions are:

• How to turn off sticky edges?
• How to get rid of that dialog after every login?
• Are there any alternative drivers which play well with Display dialog?
• How to get rid of nVidia drivers? I could only choose from version current and post-release updates:

Answer 1

In the last screenshot in your post, you can press Remove on the bottom right. This will remove the closed Nvidia drivers, after a reboot, Ubuntu will use the open-source Nouveau driver. Normally, this works better with the Display system setting.