Nvidia + Matrox TripleHead2Go with resolution 5040x1050!

[laramichaels]

Bernhard,

Many thanks for clarifying that - most useful!

best wishes and many thanks

lara

[MaDDeePee]

Hi all!

Well,

i'm currently running

[0]1280x1024 <----> [1]1680x1050 <---->[2]1280x1024

with Xinerama (two cards) and would be VERY interested to know if i could get that TwinViewXineramaInfoOverride - thing working without that bezel problems....


Would:

Option         "TwinViewXineramaInfoOverride" "1280x1024+0+0, 1680x1050+1050+0, 1280x1024+2960+0"

...work for me without "bezels" and problems? (because the middle screen got a different height, 1024 <> 1050)

Help much appreciated!

Yours

[JaXXoN]

Originally Posted by MaDDeePee

[0]1280x1024 <----> [1]1680x1050 <---->[2]1280x1024
with Xinerama (two cards)

The "faked" XineramaInfo provided by the nvidia driver is disabled once
"true" Xinerama is enabled. So, XineramaInfoOverride is not a solution
when you run "true" Xinerama on two GPUs, sorry.

Unfortunately, you can't use the TH2G as proposed in this thread,
either, because you need displays with the same geometry.
(unless you are willing to run the 1680x1050 LCD at the non-native
resolution 1280x1024, or the other two 1280x1025 LCDs at 1680x1050,
where the later may not work anyway, depending on the capability of
your LCDs).

regards

Bernhard

[cycler]

This thread seems like the best place to post this scenario.

Up until recently, I have been happily running a 6 LCD setup on a single GTX 260 with two TH2G.



However, just recently I acquired a new Dell U3011 LCD that does 2560x1600.

I'm wanting to stop using one of the TH2G, and run with three LCD's above the new LCD. So essentially four LCD's total on a single card.

Videocard                         Displays
  ________
          |
    DVI-D +-----------------------> LCD #1 @ 2560x1600
          |            ____
    Out   |           |    |
    put   |           |    +------> LCD #2 @ 1280x1024
          |           |    |
    DVI-D +---------->|    +------> LCD #3 @ 1280x1024
  ________|           |    |
                      |    +------> LCD #4 @ 1280x1024
                      |____|
                       TH2G

http://www.nvnews.net/vbulletin/showthread.php?t=133740&page=2

Even the NVidia control app shows me a plausible scenario.



I'm feeling that I can accomplish this, but the xorg settings for it have me a bit at a loss. So far, I am able to get X to display something on all four LCD's but the three connected to the TH2G don't seem to be receiving the right signals and I get a series of blurred and stretched images instead. My guess is I am missing something fundamental here.

The following was my latest attempt, but the U3011 just goes out of range and the TH2G LCD's are unreadable. I think perhaps the ranges for the U3011 are something like HorizSync 29.0 - 113.0 and VertRefresh 49.0 - 86.0 but I don't know for sure. That's just what the NVidia control panel guessed.

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Matrox"
    ModeLine	   "3840x1024" 254.31 3840 3856 3872 3976 1024 1025 1032 1066 +HSync +VSync
    HorizSync      31-80
    VertRefresh    56-76
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Videocard0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "UseEDID" "False"
    Option         "ExactModeTimingsDVI"      "True"
    Option         "PixmapCacheSize"          "5760000"
    Option         "Coolbits"                 "1"
    Option         "NoLogo"                   "True"
    Option         "CursorShadow"             "True"
    Option         "RenderAccel"              "True"
    Option         "AddARGBGLXVisuals"        "True"
    Option         "ConnectToAcpid"           "False"
    Option         "TwinView"                 "True"
    Option         "TwinViewOrientation"      "Above"
    Option         "TwinviewXineramaInfo"     "True"
    Option         "TwinViewXineramaInfoOverride" "1280x1024+0+0, 1280x1024+1280+0, 1280x1024+2560+0, 2560x1600+640+1024"
    Option         "DynamicTwinView"          "False"
    Option         "MetaModes"                "3840x1024,2560x1600"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Where am I going wrong here guys?

[JaXXoN]

Originally Posted by cycler

    ModeLine	   "3840x1024" 254.31 3840 3856 3872 3976 1024 1025 1032 1066 +HSync +VSync
    [...]
    Option         "UseEDID" "False"

Since the EDIDs are not read out in your configuration, Xorg doesn't know
the exact timing for the U3011 and just creates an ModeLine from the
hsync/vsync values you provided. So I guess you would need to add a
ModeLine for the U3011. Second, Xorg doesn't know which device is connected
where, so it might be worth a try to swap cables or swap the order in
"MetaModes".

However, since you are using the default 3840x1024 resolution for the
TH2G, it may not be necessary to supply a modeline and to disable
the use of the EDID: let Xorg probe the connected devices and it
should just work.

For future postings on this topic, I suggest to add the nvidia-bug-report.log
in order to get more insights from the Xorg.0.log.

regards

Bernhard

[cycler]

Your suggestion to let it probe has has yielded me a fairly functional set of displays. However, the method nvidia-settings choose to configure uses mode descriptions to reference the two displays, and it's unclear to me how I can further divide up the three LCD's on the TH2G now. (The three LCD's on the TH2G appear as one screen) Can I simply add the sizes and offset's to the line? The Nvidia appendix doesn't seem to clearly define how to do this but I might be overlooking the obvious again.

Thanks again for your help!

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "DFP-0: 3840x1024 +0+0, DFP-1: nvidia-auto-select +640+1024"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

[JaXXoN]

Originally Posted by cycler

it's unclear to me how I can further divide up the three LCD's on the TH2G now.

Hmm, strange - I can see a more or less appropriate TwinViewXineramaInfoOverride in your xorg logs but not in the xorg.conf. Maybe it helps when adding the following line in the "Screen" section of your xorg.conf:

Option "TwinViewXineramaInfoOverride" "1280x1024+0+0, 1280x1024+1280+0, 1280x1024+2560+0, 2560x1600+640+1024"

However, since it seems that xorg already applied the option correctly, it makes we wonder why it is ignored, later.

regards

Bernhard

[cycler]

Works perfectly! For future reference, Unity wants to show it's launcher on the first monitor. So the order of TwinViewXineramaInfoOverride is important if that matters to you. I wanted to show it on my largest display so....

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "TwinView" "1"
    Option         "TwinViewXineramaInfoOverride" "2560x1600+640+1024, 1280x1024+0+0, 1280x1024+1280+0, 1280x1024+2560+0"
    Option         "TwinViewXineramaInfoOrder" "DFP-1, DFP-0"
    Option         "metamodes" "DFP-0: 3840x1024 +0+0, DFP-1: nvidia-auto-select +640+1024"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Thanks much!!