I set Ubuntu to use the proprietary AMD fglrx drivers included in the software sources menu. After first rebooting, I noticed that the image on my monitor was not scaled to fill my monitor completely, but instead left a 1 inch thick black frame around the image.

I fixed this by going into the catalyst control center and changing Underscan to 0%, which scaled the image properly and filled out the entire screen.

Then I rebooted, and the problem was back, again there is the same 1 inch thick boarder framing the image on my monitor. I thought that maybe I forgot to save my settings or something, so I went back into catalyst control center to check, but all the settings were right and just the way I left it. If I readjust the slider for Underscan the image is set back to full panel size, and looks right, but Ubuntu does not seem to remember this after reboot.

What can I do to make Ubuntu remember my setting, and have the image scale correctly on start up?

My graphics card is an ATI Radeon HD 6970 2gb,
My monitor is a Fujitsu Siemens SL23T-1 23"

This is how the settings look when my computer starts up, and how they are supposed to look to have the image scale correctly, even though it's not scaled. If I adjust the slider it scales correctly.