Ubuntu 8.10 screen resolution don't work

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.

After many days trying to fix this I found the problem with a help from one of my partners.

I just needed to remove the very first 2 commands I ran when Ubuntu 7.10 was installed to my laptop by doing the following:

1) Run the following command to uninstall (remove) the xserver-xgl service (maybe you won't have it anymore after all the updates, but just to be sure):
$ sudo apt-get remove xserver-xgl

2) Run the next command to remove the Compiz Config Manager, the screen that allows to change the effects under certain hardware configurations, like the one on the Dell XPS 1330 with Intel graphics card:
$ sudo apt-get remove compizconfig-settings-manager

3) Run the autoremove command to get rid off from all the extra packages not needed anymore:
$ sudo apt-get autoremove

Done! Just restart the computer and you will be able to access to the Screen Resolution menu, where you can configure the resolution, distribution and display of both the laptop and external screens.

Hope someonw can find this useful.

Ubuntu FTW!!!