I'm running Ubuntu 12.04 LTS for a few weeks now. It's running on an Asus laptop, and I have a second screen attached. Everything was running very smooth with 2 screens, until I tried to start a few applications which needed graphics drivers. I don't know why they didn't work, but I installed some nvidia drivers and restarted my laptop. Then the laptop screen didn't have the good resolution anymore. And I can't change it! The resolution of my second screen is perfect. Here's a screenshot of my resolution settings.

http://oi42.tinypic.com/ivz4ec.jpg
(I surrounded with [img] tags, but it won display?)

Also, the apps (e.g. VirtualBox, Mixxx) that needed the drivers still bitch about not having the required drivers. What am I doing wrong?

you can only have one nividia driver installed at a time
and for that use the current for your nvidia card
the 325 driver

and use the version that is displayed in your package manager .

Were you able to solve this technical resolution problem? If yes, let me now here how you fixed this.