Have the same problem here with HD 5670. overscan issue doesnt appear until drivers and CCC are installed. then the settings arent retained after a reboot will keep looking and post back if i find anything
Yeah I haven't had much luck figuring it out either yet. But from what I have learned all I have to do is start the control center and click ok to close it, then it goes back to normal. I noticed the bar is at the appropriate setting but it's not actually doing it!