[ale] Multiple monitors on Wheezy
Edward Holcroft
eholcroft at mkainc.com
Tue Mar 11 17:02:22 EDT 2014
I currently have two 23" monitors on my Wheezy desktop box. Now I've added
a second video card (identical to the first) so that I can have a third and
maybe a fourth monitor if needed. I installed the Nvidia drivers using
these instructions:
https://wiki.debian.org/NvidiaGraphicsDrivers
If I use the Nvidia GUI tool to enable the third monitor, it seems to
work, and even changes the xorg file, but the settings don't stick and the
file reverts to dual monitor on a single card.
$ lspci | grep GeForce
01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 8400
GS] (rev a2)
06:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 8400
GS] (rev a2)
*This first config shows the settings with 2 monitors working perfectly on
1 video card:*
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 304.88 (pbuilder at cake) Wed Apr 3 08:58:25
UTC 2013
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Acer AL2216W"
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400GS"
BusID "PCI:1:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "CRT-0"
Option "metamodes" "CRT-0: nvidia-auto-select +0+0, CRT-1:
nvidia-auto-select +1680+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
*This second config shows what the file looks like after enabling the
second card using the Nvidia S server setting tool:*
# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings: version 304.88 (pbuilder at cake) Wed Apr 3 08:58:25
UTC 2013
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Acer AL2216W"
HorizSync 30.0 - 82.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Monitor"
# HorizSync source: edid, VertRefresh source: edid
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Acer V233H"
HorizSync 31.0 - 83.0
VertRefresh 56.0 - 76.0
Option "DPMS"
EndSection
Section "Device"
Identifier "Device0"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400GS"
BusID "PCI:1:0:0"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BoardName "GeForce 8400GS"
BusID "PCI:6:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "Stereo" "0"
Option "nvidiaXineramaInfoOrder" "CRT-0"
Option "metamodes" "CRT-0: nvidia-auto-select +0+0, CRT-1:
nvidia-auto-select +1680+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "Stereo" "0"
Option "metamodes" "nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
However, the third monitor never displays anything even though it's clearly
being detected. I've tried both outputs on the new card. If I exit our of
the Nvidia tool, the settings are not saved and next time I open it I have
to detect the monitor again. I've tried with and without xinerama.
Any ideas?
cheers
ed
--
Edward Holcroft | Madsen Kneppers & Associates Inc.
11695 Johns Creek Parkway, Suite 250 | Johns Creek, GA 30097
O (770) 446-9606 | M (770) 630-0949
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