[ale] Multiple monitors on Wheezy

Jim Kinney jim.kinney at gmail.com
Tue Mar 11 17:11:41 EDT 2014


Try changing the the last Screen's Option line to

Option   "metamodes" "CRT-0 nvidia-auto-select +33600+0"


On Tue, Mar 11, 2014 at 5:02 PM, Edward Holcroft <eholcroft at mkainc.com>wrote:

> 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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-- 
-- 
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you gain
at one end you lose at the other. It's like feeding a dog on his own tail.
It won't fatten the dog.
- Speech 11/23/1900 Mark Twain


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