Re: [OT]Dual GPU - help on the way

From: Kevin Bowling <kevin.bowling_at_kev009.com>
Date: Sat, 3 Jul 2021 23:07:53 -0700
Which version of nvidia-driver? If it’s stuck on 390 you will need to
manually create two XScreens and target the two gpus accordingly with
“pciconf -lv” b/s/f numbers in this stanza.  I think newer cards&drivers
might handle this better with glvnd but would like to hear a user report of
two non-SLI nvidia cards with >460 drivers and recent ports tree like
2021Q3.

https://forums.developer.nvidia.com/t/multi-nvidia-gpus-and-xorg-conf-how-to-account-for-pci-bus-busid-change/34556

If it works on Linux guides it should only need minor modifications for
FreeBSD.

Regards,
Kevin

On Fri, Jul 2, 2021 at 8:07 AM Per olof Ljungmark <peo_at_nethead.se> wrote:

> On 7/2/21 4:44 PM, Michael Gmelin wrote:
> >
> >
> > On Fri, 2 Jul 2021 16:29:59 +0200
> > Per olof Ljungmark <peo_at_nethead.se> wrote:
> >
> >> On 7/2/21 4:03 PM, Milan Obuch wrote:
> >>> On Fri, 2 Jul 2021 15:52:12 +0200, Per olof Ljungmark
> >>> <peo_at_nethead.se> wrote:
> >>>
> >>>> Slightly frustrated I'm asking on this list.
> >>>>
> >>>> The setup is HP Z620 with dual Nvidia K2000 and three monitors, the
> >>>> aim is to have the desktop (xfce4) extended to all three.
> >>>>
> >>>> It should be doable with this setup but so far all efforts failed.
> >>>>
> >>>> With a "standard" xorg.conf, I get the desktop on monitor 1 and 2,
> >>>> the third is a black screen but I can move the pointer into it.
> >>>>
> >>>> Alternatively I could run another X session on X screen 1 instead
> >>>> of extending the desktop.
> >>>>
> >>>> Help welcome!
> >>>>
> >>>> Thank you in advance,
> >>>> Per
> >>>>
> >>>
> >>> Hi,
> >>>
> >>> I have zero experience with Nvidia, but I use some devices with
> >>> multiple video outputs - board with VGA + DVI or VGA + HDMI, mostly
> >>> Intel video. In my case crucial was right use of xrandr, example:
> >>>
> >>> xrandr --output DVI-D-1 --auto
> >>> xrandr --output VGA-1 --auto
> >>> xrandr --output VGA-1 --left-of DVI-D-1
> >>>
> >>> While this could not be answer for you, I'd recommend running
> >>>
> >>> xrandr
> >>>
> >>> with no option, just to see if it offers any usefull info.
> >>>
> >>> In any case, I'd like to know how you are using XFCE in
> >>> multi-monitor scenario.
> >>
> >> xrandr shows the outputs for the second card as "disconnected" so not
> >> much I can do there I think.
> >>
> >> For multi monitor with xfce, I never had a problem with a dual
> >> monitor setup and xfce, now I need to add a third.
> >>
> >
> > Could you try to start X without any configuration and then share the
> > output of xrandr with us?
> >
>
> It is not very informative:
>
> xrandr: Failed to get size of gamma for output default
> Screen 0: minimum 800 x 600, current 800 x 600, maximum 800 x 600
> default connected 800x600+0+0 0mm x 0mm
>     800x600        0.00*
>
> With the xorg.conf in my first message:
>
> Screen 0: minimum 8 x 8, current 3840 x 1200, maximum 16384 x 16384
> DVI-I-0 disconnected (normal left inverted right x axis y axis)
> DVI-I-1 disconnected (normal left inverted right x axis y axis)
> DP-0 disconnected (normal left inverted right x axis y axis)
> DP-1 disconnected (normal left inverted right x axis y axis)
> DP-2 connected primary 1920x1200+0+0 (normal left inverted right x axis
> y axis) 519mm x 324mm
>     1920x1200     59.95*+
>     1920x1080     59.93
>     1680x1050     59.95
>     1600x1200     60.00
>     1280x1024     60.02
>     1280x960      60.00
>     1024x768      60.00
>     800x600       60.32
>     640x480       59.94
> DP-3 connected 1920x1200+1920+0 (normal left inverted right x axis y
> axis) 519mm x 324mm
>     1920x1200     59.95*+
>     1920x1080     59.93
>     1680x1050     59.95
>     1600x1200     60.00
>     1280x1024     60.02
>     1280x960      60.00
>     1024x768      60.00
>     800x600       60.32
>     640x480       59.94
>
>
Received on Sun Jul 04 2021 - 06:07:53 UTC

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