I have been trying at this for a week now. I got this dual monitor setup working at one point in time using the dual head attribute for aticonfig, but when I turned on Xinerama in Catalyst Control Center, I had a plethora of problems.. I figured my best bet would be to reinstall ubuntu and try it from scratch.
So as of right now, I am at a clean install of Meerkat x64. At the end of the installation, my second monitor turned on! It was a miracle!... The one I wanted to work (the PCIe card) showed the Press ENTER to reboot screen, while the onboard card displayed a terminal type screen... showing various procedures ending. Regardless, my monitor turned on, so I know it is possible that it is being recognized.
But now, when I login it doesn't turn on again.. never again. Even when I go to gnome-display-properties, only one monitor appears. Detect Displays does nothing.
Here's some info, just for ... clarification.
lspci | grep VGA
01:05.0 VGA compatible controller: ATI Technologies Inc RS880 [Radeon HD 4200]
02:00.0 VGA compatible controller: ATI Technologies Inc RV710 [Radeon HD 4350]
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
VGA-0 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm
1280x1024 75.0 + 60.0*
1024x768 75.1 70.1 60.0
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
DVI-0 disconnected (normal left inverted right x axis y axis)
* 0. 01:05.0 ATI Radeon HD 4200
1. 02:00.0 ATI Radeon HD 4300/4500 Series
* - Default adapter
Actually, that's the first time that xorg.conf has ever appeared for the first time in my many re-installations... I'm really surprised. Every other time when I ran sudo Xorg -configure .. X would quit, go to console... show some lines and reboot the computer before I could read any of it.
Identifier "Default Screen"
Identifier "Default Device"
What must I do to get my other monitor to show up in gnome-display-properties, preferably without Catalyst Control Center. Although, I know I'll probably end up needing it just for the Xinerama feature. Either way, can any body help me... I think my hair is turning gray now because of this and I'm only 24, this isn't good.