Originally Posted by netllama
I have a few questions:
3) Does updating the BIOS to the latest version have any impact?
[this is an adendum to my previous reply]
Re: 3). I just updated the BIOS -- and that indeed solved the problem. Using my previous (good) xorg.conf as a guide, I already modified my current xorg.conf so now I am running at 1600x1200, as I want.
Thanks for your help. Without it I was completely stuck.