I am completely new to Ubuntu and now running into so many problems regarding my display. I will be so grateful to the community to help me out and keep me loving Ubuntu.

When I run

lspci | grep VGA

I get the following output

01:00.0 VGA compatible controller: ATI Technologies Inc RV380 [Radeon X600 (PCIE)]

I am not sure if it means the driver is installed.

Now the problem is

1. I can not change the resolution like I can do in windows.
2. I wanted to use dual monitor but it can not detect dual monitor. The monitor option in the preference shows 'Unknown'
3. I tried to use a VGA switch for my ps3 and computer, but the computer is stuck with 1024x768 resolution.

I have been trying for last three days, couldn't figure out anything. Now asking for you wisdom to get my display work.

Regards, MMRAHMAN