I have two monitors set up using Nvidia Twinview on Ubuntu 11.10.
When I drag something (a file, a link on a website, select text, etc.), my right-hand monitor screws up. Usually the screen shifts up by about 200 pixels, and I often get weird graphics glitches.
I made a video here which is kind of grainy, but shows what happens. The video doesn't exactly show what I see because during the first 12 seconds, when dragging from the left monitor, the right monitor screws up like in the last 12 seconds.
This doesn't happen when dragging windows, only objects like files or hyperlinks. Sometimes my desktop gets stuck like that, which is really frustrating.
My graphics card is an NVidia GTX 460 SE. I've had this problem for some time, but I definitely know there was a time when I had two monitors and this didn't happen.
>lspci -nn | grep VGA >03:00.0 VGA compatible controller : nVidia Corporation Device [10de:0e23] (rev a1)
I'll also include a screenshot which basically shows what's in the video.
Based on fossfreedom's advice, I tried installing the 295 drivers from the ubuntu-x-swat ppa. I follow the instructions here which didn't install them.
I made sure I was booting into kernel 3.0.0-16 (before I was using 3.0.0-12) and reinstalled again to no avail.
The reinstall command says it's installing the 295 drivers, but they're not getting installed for some reason.