Multiple monitors and the xorg.conf file

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Multiple monitors and the xorg.conf file

Postby Forbin117 on Mon Mar 09, 2009 2:49 pm

I have three monitors that I would like to use. I can get one working, or the other two, but never all three at the same time. If I change my BIOS settings to initialize my onboard video first, the one connected to that comes on, but not the other two. If I initialize my video card first, the two connected to it come on (using Twinview), but not the onboard one. I can't tell if the problem is in the BIOS, or my xorg.conf file. Here it is:

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder3) Thu Oct 4 10:33:51 PDT 2007

# xorg.conf (xorg X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "ServerFlags"
Option "Xinerama" "True"
EndSection

Section "ServerLayout"

# Uncomment if you have a wacom tablet
# InputDevice "stylus" "SendCoreEvents"
# InputDevice "cursor" "SendCoreEvents"
# InputDevice "eraser" "SendCoreEvents"
Identifier "Default Layout"
Screen "Default Screen"
Screen "Second Screen" Rightof "Default Screen"
InputDevice "Generic Keyboard"
InputDevice "Configured Mouse"
EndSection

Section "Files"
EndSection

Section "Module"
Load "glx"
EndSection

Section "InputDevice"
Identifier "Generic Keyboard"
Driver "kbd"
Option "CoreKeyboard"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection

Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ImPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
EndSection

Section "InputDevice"
Identifier "stylus"
Driver "wacom"
Option "Device" "/dev/input/wacom"
Option "Type" "stylus"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
Identifier "eraser"
Driver "wacom"
Option "Device" "/dev/input/wacom"
Option "Type" "eraser"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "InputDevice"
Identifier "cursor"
Driver "wacom"
Option "Device" "/dev/input/wacom"
Option "Type" "cursor"
Option "ForceDevice" "ISDV4"# Tablet PC ONLY
EndSection

Section "Monitor"
Identifier "Generic Monitor"
HorizSync 30.0 - 70.0
VertRefresh 50.0 - 160.0
Option "DPMS"
EndSection

Section "Monitor"
Identifier "pavilion monitor"
HorizSync 30.0 - 70.0
VertRefresh 50.0 - 160.0
Option "DPMS"
EndSection

Section "Device"
Identifier "nVidia Corporation G71 [GeForce 7300 GS]"
Driver "nvidia"
EndSection

Section "Device"
Identifier "nVidia Corporation C51G [GeForce 6100] (rev a2)"
Driver "nvidia"
EndSection

Section "Screen"
Identifier "Default Screen"
Device "nVidia Corporation G71 [GeForce 7300 GS]"
Monitor "Generic Monitor"
DefaultDepth 24
Option "AddARGBGLXVisuals" "True"
Option "AddARGBVisuals" "True"
Option "NoLogo" "True"
Option "TwinView" "True"
Option "MetaModes" "nvidia-auto-select, nvidia-auto-select"
SubSection "Display"
Depth 24
Modes "nvidia-auto-select"
EndSubSection
EndSection

Section "Screen"
Identifier "Second Screen"
Device "nVidia Corporation C51G [GeForce 6100] (rev a2)"
Monitor "pavilion monitor"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "Enable"
EndSection


If anyone can help with this problem, I'd sure appreciate it.

Also, I'm new to the forum, and Mint, so it's nice to meet you all

Forbin117
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Re: Multiple monitors and the xorg.conf file

Postby garda on Mon Mar 09, 2009 5:07 pm

Have you tried playing with the settings in nVidia Settings? It is the software that is supposed to give you the necessary settings and such. I no longer use multi monitor here, so I kind of forget how I did it. One thing is for sure, though, I used the aforementioned software to setup Twinview. It should be available somewhere in the Menu, in System Tools > nVidia Settings if I remember it correctly. If it is nowhere to be found, try to install it using Synaptic -- search for nvidia-settings.
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Re: Multiple monitors and the xorg.conf file

Postby Forbin117 on Mon Mar 09, 2009 5:40 pm

TwinView is working properly when I initalize the added video card first. But if I intialize the onboard video of my motherboard first, only one of the three monitors works. When the video card is first, I get the other two as one screen, but not the monitor connected to the onboard.
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Re: Multiple monitors and the xorg.conf file

Postby garda on Mon Mar 09, 2009 6:01 pm

I recall there is an option that you have to add to your xorg.conf but cannot tell what it exactly is. nVidia's readme file has descriptions of all recognized options. It is available in /usr/share/doc/nvidia-glx or /usr/share/doc/nvidia-glx-new (depending on which version of nvidia driver in use), inside a GZip archive called README.txt.gz.
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Re: Multiple monitors and the xorg.conf file

Postby Forbin117 on Tue Mar 10, 2009 12:49 pm

bump
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