I finally succeeded in getting a dual head setup working with the
nouveau driver using xorg/twm. First, according to Dan, we can just use
/etc/X11 for xorg.conf. That's what I did. It looks like:
Section "Monitor"
Identifier "DELL 2407WFP"
Option "DPMS"
Option "LeftOf" "DELL 2410"
EndSection
Section "Monitor"
Identifier "DELL 2410"
Option "DPMS"
Option "Position" "1920 0"
EndSection
Section "Device"
Identifier "GeForce 9800 GTX"
Driver "nouveau"
Option "Monitor-DVI-I-2" "DELL 2407WFP"
Option "Monitor-DVI-I-1" "DELL 2410"
EndSection
Section "Screen"
Identifier "Default Screen"
Device "GeForce 9800 GTX"
Monitor "DELL 2407WFP"
DefaultDepth 24
SubSection "Display"
Virtual 3840 1200
EndSubSection
EndSection
I think the key here was the Monitor options in the Section "Device".
The screen output values are HW dependent and can be retrieved with
using `xrandr`.
One other interesting thing is that when I configured the kernel to add
nouveau, I set something that did:
[ 0.898645] Console: switching to colour frame buffer device 240x75
And at that point the console switched and I got the kernel boot
messages on *both* screens. I don't stay in console mode very long, but
I will do some investigating to try to restrict it to one monitor.
-- Bruce
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