Anyone got three monitors working?

[Thomas Cameron]

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On 11/28/2011 12:54 PM, Don Krause wrote:
> 
> On Nov 28, 2011, at 9:51 AM, suvayu ali wrote:
> 
>> On Sun, Nov 27, 2011 at 20:41, Thomas Cameron
>> <thomas.cameron at camerontech.com> wrote:
>>> I am wondering, since my motherboard has a four PCI Express x1 ports and
>>> I see PCI Express x1 video cards for decent prices, if I can either
>>> replace my single card with two identical two-port X1 cards, or just add
>>> a single X1 video card to what I already have and get triple head.
>>>
>>
>> I am not sure there are any cards in the market with support for more
>> than 2 monitors. If that is true SLI is your only option. And as far
>> as I know SLI is only supported by the proprietary drivers. You might
>> want to check up on that before you invest on another card.
>>
>>
> 
> Uhh, no, SLI has little to nothing to do with multiple monitor support..
> 
> We do 3 monitor systems, using 2 dual DVI Nvidia cards with the proprietary driver for a medical device, works fine.
> 
> The only "trick" is finding the proper BusID for your cards.
> 
> Here's a working xorg.conf for a 3 headed monitor setup, on CentOS 5, using Nvidia's proprietary drivers..
> 
> # Xorg configuration
> 
> Section "ServerLayout"
>         Identifier     "Default Layout"
>         Screen      0  "Screen0" 0 0
>         Screen      1  "Screen1" RightOf "Screen0"
>         Screen      2  "Screen2" LeftOf "Screen0"
>         InputDevice    "Mouse0" "CorePointer"
>         InputDevice    "Keyboard0" "CoreKeyboard"
>         Option      "Clone" "off"
>         Option      "Xinerama" "on"
> EndSection
> 
> Section "InputDevice"
> 
>     # generated from default
>         Identifier  "Mouse0"
>         Driver      "mouse"
>         Option      "Protocol" "auto"
>         Option      "Device" "/dev/input/mice"
>         Option      "Emulate3Buttons" "no"
>         Option      "ZAxisMapping" "4 5"
> EndSection
> 
> Section "InputDevice"
>         Identifier  "Keyboard0"
>         Driver      "kbd"
>         Option      "XkbModel" "pc105"
>         Option      "XkbLayout" "us"
> EndSection
> 
> Section "Monitor"
> 
>  ### Comment all HorizSync and VertSync values to use DDC:
> #       Option      "DPMS"
>  ### Comment all HorizSync and VertSync values to use DDC:
>  ### Comment all HorizSync and VertSync values to use DDC:
>         Identifier   "Monitor0"
>         VendorName   "DELL"
>         ModelName    "P1130"
>  ### Comment all HorizSync and VertSync values to use DDC:
>         HorizSync    28.0 - 133.0
>         VertRefresh  43.0 - 172.0
> EndSection
> 
> Section "Monitor"
> 
>  ### Comment all HorizSync and VertSync values to use DDC:
> #       Option      "DPMS"
>  ### Comment all HorizSync and VertSync values to use DDC:
>  ### Comment all HorizSync and VertSync values to use DDC:
>         Identifier   "Monitor1"
>         VendorName   "DELL"
>         ModelName    "P1130"
>  ### Comment all HorizSync and VertSync values to use DDC:
>         HorizSync    28.0 - 133.0
>         VertRefresh  43.0 - 172.0
> EndSection
> 
> Section "Monitor"
> 
>  ### Comment all HorizSync and VertSync values to use DDC:
> #       Option      "DPMS"
>  ### Comment all HorizSync and VertSync values to use DDC:
>  ### Comment all HorizSync and VertSync values to use DDC:
>         Identifier   "Monitor2"
>         VendorName   "DELL"
>         ModelName    "P1130"
>  ### Comment all HorizSync and VertSync values to use DDC:
>         HorizSync    28.0 - 133.0
>         VertRefresh  43.0 - 172.0
> EndSection
> 
> Section "Device"
>         Identifier  "Videocard0"
>         Driver      "nvidia"
>         VendorName  "NVidia"
>         BoardName   "GeForce 7600 GT"
>         BusID       "1:0:0"
> EndSection
> 
> Section "Device"
>         Identifier  "Videocard1"
>         Driver      "nvidia"
>         VendorName  "NVidia"
>         BoardName   "GeForce 7600 GT"
>         BusID       "1:0:0"
>         Screen      1
> EndSection
> 
> Section "Device"
>         Identifier  "Videocard2"
>         Driver      "nvidia"
>         VendorName  "NVidia"
>         BoardName   "GeForce 7600 GT"
>         BusID       "2:0:0"
> EndSection
> 
> Section "Screen"
>         Identifier "Screen0"
>         Device     "Videocard0"
>         Monitor    "Monitor0"
>         DefaultDepth     24
>         SubSection "Display"
>                 Viewport   0 0
>                 Depth     24
>         EndSubSection
> EndSection
> 
> Section "Screen"
>         Identifier "Screen1"
>         Device     "Videocard1"
>         Monitor    "Monitor1"
>         DefaultDepth     24
>         SubSection "Display"
>                 Viewport   0 0
>                 Depth     24
>         EndSubSection
> EndSection
> 
> Section "Screen"
>         Identifier "Screen2"
>         Device     "Videocard2"
>         Monitor    "Monitor2"
>         DefaultDepth     24
>         SubSection "Display"
>                 Viewport   0 0
>                 Depth     24
>         EndSubSection
> EndSection

Awesome, thanks.
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