Is it possible to disable the X screen from stretching to fill the monitor? For instance, if Xvesa is configured to display 800x600, can I have that 800x600 box centered in the middle of the screen with black surrounding it, rather than stretched to fit a possible different aspect ratio?
I could not find a way to pull this off. I did found that each graphics card has its own way of disabling the video card output scaler and there are different hacks to pull that off (for instance, the ancient NVSC from the dos days for nVidia cards). I could not find any documented or undocumented way of doing this with ATi cards.
The display's scaler is, as far as I can tell, automatically disabled if the video card scaler is as well.