After so much struggling, I finally resolved the screen issues with my Dell XPS 1330 with Ubuntu 8.10 installed, after upgrading from ubuntu 7.10 and then 8.04.
Let me explain:
I installed Ubuntu 7.10 and everything went really smooth, just had to
tweak it a little to get the desktop effects to work properly.
Then I upgraded to Ubuntu 8.04, and the problems started to appear. First the numeric keyboard
wasn't working neatly, but could figure out how to fix it. Then I realized that nor the screen resolution on my external monitor, or the advanced effects were working right.
So, ever since I upgraded to 8.04 the screen was awfull, I tryied almost every solution in the forums, but none worked.
Then I upgraded to Ubuntu 8.10 and the problems still there. No effects and a new thing I didn't realized before: The System -> Preferences -> Screen Resolutions menu didn't show up, so I was unable to change these settings. And also the keyboard
wasn't working either.
