Graphics Card not working well (ATI X1600 Mobility)

[goatchild]

Hi guys,

I've just installed Ubuntu on my iMac (white intel core duo).
I've managed to get everything to work so far, except my graphics card:

When I move windows around or scroll down etc, I notice some twitching.
I've also installed two games, Castle Wolfnstein, and FlightGear.
In castle wolfenstein I can's see a thing, except for the text, everything else is dark. In flightgear everything shows up weird, so I can't even play.

I've installed the proprietary driver for my card, I go to:

System -> Administration -> Hardware Drivers

And I've got the ATI accelerated graphics driver enabled

So is there anything I can do to make the graphics card to work correctly?

PS:Go easy on me, I'm new to linux, terminal commands etc, but willing to learn. :)

Thank you very much

[cyberdork33]

If you have desktop effects enabled, you can get odd effects with video and 3D graphics sometimes. Turn off desktop effects and everything works great.

[goatchild]

That didn't work. =/

I went to:

System -> Preferences -> Appearence -> Visual Effects -> None

Did I do somehting wrong?

[cyberdork33]

That didn't work. =/

I went to:

System -> Preferences -> Appearence -> Visual Effects -> None

Did I do somehting wrong?
what do you get from:
glxinfo |grep direct
and
fglrxinfo