fglrx, x86_64, and multiple monitor problems - fix or revert?

[burnie]

I'm running an HP tx2500z (x86_64) with two monitors. I followed the leigh123linux's HOWTO for my case, but the newly installed Radeon control software (fglrx) cannot respond properly when I uncheck "mirror screens". I'd like to make it work, but it's more important for me to get my two separate displays back. The diagnostic I get says I'm asking for too large of a screen, saying that the largest screen size available is a square of the largest dimension of either screen (in my case, depending on which second monitor I've plugged in, it is 1600x1600 or 1920 by 1920). The required virtual screen size, in a horizontal configuration, is sum of width x largest height, obviously.

So I'd like help in either of two ways
-- first - is it possible to make the fglrx installation work properly (I do not use xorg.conf)?
-- second - how do I revert without a complete reinstall (I have a large complex installation and it takes a lot of time)

Thanks much for any help.

[Cygn]

I've got the exact same setup.
You need an xorg.conf with fglrx. It even creates one by itself on install, so you've got one probably.

you need this in xorg.conf, section Screen

     SubSection "Display"
           # ADD A VIRTUAL LINE TO PROVIDE FOR THE LARGEST SCREENS YOU WILL HOTPLUG 
          #  Screen1W+screen2W  screen1H+scren2H
           Virtual              3200  2240 
       EndSubSection

[burnie]

Sounds very good, Cygn. I'm trying it now.
I really appreciate your very prompt reply

---------- Post added at 03:24 PM ---------- Previous post was at 02:57 PM ----------

Works fine, Cgyn - thanks again.