System -> Preferences -> Screen Resolution
Change the resolution, hit the happy button called Apply.
What do you see? In the latest release of Ubuntu, I see GDM asking me to login.. None the less I login, to see my old resolution is still being used.
Windows do it better. At least since the buggy ages of Windows 95 this used to work.
On the happy note, while installing Ubuntu, I could surf to meebo and chat with my friends.
On the 'getting work done' note, I remove Ubuntu, 5 minutes after I 've installed it. Fedora lasted for 2 weeks. It seems Archlinux which I had for almost 2 years is the right choice for me after all. And because arch64 is buggy, I'm gonna go with the i686.
At least I get the working flash-plugin (from Adobe) when I'm in i686 so I don't have to restart to Windows just to watch a flash video, or surf a flash-allover website.