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Ubuntu and Rosewill dual monitors

By jelly | March 27, 2008

I finally got my setup working with my rosewill montiors. I have Rosewill 912 monitors with a Nvidia 8600 gt video card. When I first tried to configure I constantly got Input not Supported across the rosewill monitors. This was annoying the hell out of me, especially since it puts input not supported in a blue box that bounces around your screen and gets into the way.

To fix this I made the following changes to xorg.conf file located in /etc/X11

first change the Monitor sections and adjust the horiz sync and vert refresh

Section “Monitor”
Identifier     “Monitor0″
VendorName     “Unknown”
ModelName      “CRT-0″
HorizSync       31.0 - 95.0
VertRefresh     55.0 - 65.0
EndSection

Section “Monitor”
Identifier     “Monitor1″
VendorName     “Unknown”
ModelName      “LCD R912E”
HorizSync       31.0 - 95.0
VertRefresh     55.0 - 65.0
EndSection

Then add Option “UseEDID” “FALSE” to the device section (my examples below)

Section “Device”
Identifier     “Videocard0″
Driver         “nvidia”
VendorName     “NVIDIA Corporation”
BoardName      “GeForce 8600 GT”
Option         “UseEDID” “FALSE”
EndSection

Section “Device”
Identifier     “Videocard1″
Driver         “nvidia”
VendorName     “NVIDIA Corporation”
BoardName      “GeForce 8600 GT”
Option         “UseEDID” “FALSE”
BusID          “PCI:2:0:0″
Screen          1
EndSection

That should be all you need to do, I had some other problems with the screen resolutions but I was able fix those through the nvidia-settings config tool. Anyway that section in my file look as follows:

Section “Screen”
Identifier     “Screen0″
Device         “Videocard0″
Monitor        “Monitor0″
DefaultDepth    24
Option         “TwinView” “1″
Option         “TwinViewXineramaInfoOrder” “CRT-0″
Option         “metamodes” “CRT-0: 1280×1024 +0+0, CRT-1: 1280×1024 +1280+0″
EndSection

Section “Screen”
Identifier     “Screen1″
Device         “Videocard1″
Monitor        “Monitor1″
DefaultDepth    24
Option         “TwinView” “0″
Option         “TwinViewXineramaInfoOrder” “CRT-1″
Option         “metamodes” “CRT-1: 1280×1024 +0+0, CRT-1: nvidia-auto-select +1280+0″
EndSection