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

On Fri, 2 Jul 2021 16:29:59 +0200
Per olof Ljungmark <peo@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@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?

-- 
Michael Gmelin