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#1 2016-09-15 01:37:02

godlikemouse
Member
From: Durango, CO
Registered: 2016-09-15
Posts: 23
Website

Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

Hey guys,

I've recently built a machine with dual Nvidia Quadro K620 video cards.  I've got the first up and running with no issue however, I'm having a hard time getting the output from the second to show up.  I've got monitors hooked up to both the DVI output and the DisplayPort out but so far, I haven't been able to get anything to display.

lspci shows that both video cards are seated and visible:

01:00.0 VGA compatible controller: NVIDIA Corporation GM107GL [Quadro K620] (rev a2)
02:00.0 VGA compatible controller: NVIDIA Corporation GM107GL [Quadro K620] (rev a2)

I'm trying to get 8 monitors running in total.  I can get 4 from the first running no problem now, I just need a little help on the second.  Any help would be greatly appreciated, thanks in advance.


All things gaming, anime, coding, web, technology and futuristic. Experimentalist and student of the universe.

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#2 2016-09-16 03:31:26

godlikemouse
Member
From: Durango, CO
Registered: 2016-09-15
Posts: 23
Website

Re: Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

As an update: I've managed to get the second video card working, it is initializing and displaying the xorg "X" cursor but I've been unsuccessful so far in getting Gnome to display on the second video card.  To make things simple I'm only using 2 monitors for each card.  One out the DVI and one out the DP on each card.  The weird thing is that xrandr still shows the other monitors as disconnected even though I can move my mouse through them.  Here's my current testing setup:

*----------------* *----------------*
|                    | |                    |
|        DP-1    | |    DVI-I-0    |
|                    | |                    |
*----------------* *----------------*
*----------------* *----------------*
|                    | |                    |
|        DP-0    | |    DVI-I-1    |
|                    | |                    |
*----------------* *----------------*

DP-0 and DVI-I-1 work fine, both are shown as connected in xrandr and configurable through the gnome display manager.  DP-1 and DVI-I-0 however, are shown as disconnected in xrandr and not visible to the gnome display manager, even though xorg obviously is seeing it because I can move my mouse through it and see the "X" cursor. 

Anyone have any ideas on how to get gnome to see the screens of the second video card?


All things gaming, anime, coding, web, technology and futuristic. Experimentalist and student of the universe.

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#3 2016-09-16 11:04:28

Buddlespit
Member
From: Chesapeake, Va.
Registered: 2014-02-07
Posts: 501

Re: Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

Are you using nvidia or nouveau  drivers? I have found that it's much easier for me to setup multi cards/multi displays using nvidia-settings to write my xorg.conf (XXmonitors.conf) . If I use xrandr, I end up loosing either a card or display on reboot.

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#4 2016-09-16 13:15:19

godlikemouse
Member
From: Durango, CO
Registered: 2016-09-15
Posts: 23
Website

Re: Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

Hi Buddlespit,

Thanks for the reply.  I'm using the nvidia drivers and I've been using the nvidia-settings to configure my setup.  Right now I have the bottom 2 screens configured as "Screen0" and Gnome shows up just fine there, the top 2 screens are configured as "Screen1" and I can't get Gnome to display on anything other than "Screen0" (the first GPU).  Any ideas on how to tell Gnome to use "Screen1" as well?


All things gaming, anime, coding, web, technology and futuristic. Experimentalist and student of the universe.

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#5 2016-09-16 20:34:52

Buddlespit
Member
From: Chesapeake, Va.
Registered: 2014-02-07
Posts: 501

Re: Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

Sorry, Gnome is beyond my scope of expertise. I do know that my monitors are set up for a single screen. KDE is also having multi-monitor issues atm...

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#6 2016-09-19 15:44:21

godlikemouse
Member
From: Durango, CO
Registered: 2016-09-15
Posts: 23
Website

Re: Help Setting Up Dual Nvidia Quadro K620 Dedicated Video Cards

Ok, I finally got this working.  The problem appeared to be trying to use Gnome with multi GPU.  Xrandr doesn't work properly in this configuration and only sees live outputs from the first GPU.  Once I switched to a different desktop such as FluxBox or XFCE then everything started working.  For any one else looking to use this configuration I'm going to share my xorg.config file in the hopes that it might help.

/etc/X11/Xorg.conf

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 370.28  (builduser@felix)  Fri Sep  9 15:21:20 CST 2016

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 1080
    Screen      1  "Screen1" 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      "Ancor Communications Inc VE248"
    HorizSync       30.0 - 83.0
    VertRefresh     50.0 - 76.0
    Option         "DPMS"
EndSection

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor1"
    VendorName     "Unknown"
    ModelName      "Ancor Communications Inc VE248"
    HorizSync       30.0 - 83.0
    VertRefresh     50.0 - 76.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro K620"
    BusID          "PCI:1:0:0"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BoardName      "Quadro K620"
    BusID          "PCI:2:0:0"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-1"
    Option         "metamodes" "DP-0: nvidia-auto-select +0+0, DVI-I-1: nvidia-auto-select +1920+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection

Section "Screen"
    Identifier     "Screen1"
    Device         "Device1"
    Monitor        "Monitor1"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "metamodes" "DVI-I-1: nvidia-auto-select +0+0, DP-0: nvidia-auto-select +1920+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection


All things gaming, anime, coding, web, technology and futuristic. Experimentalist and student of the universe.

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