Dual Monitor - second monitor not working - users - Fedora mailing-lists

7 Jan 2020


      Fedora 31
When installing, I had a Dell monitor attached to an nvidia graphics card via HDMI and that was working fine.  I 
installed the nvidia drivers for this.
I now want to use an old ViewSonic monitor as a second monitor so I plugged it into the on-board VGA port and booted. 
The ViewSonic monitor is now the only monitor working.  I adjusted the settings to make the display useable (Settings -> 
Devices -> Displays) but only the ViewSonic monitor is listed here.
Google has led me to try this:
simon@hedgehog ~]$ lspci | grep -i VGA
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 630 (Desktop 9 Series) (rev 02)
01:00.0 VGA compatible controller: NVIDIA Corporation GP108 [GeForce GT 1030] (rev a1)
[simon@hedgehog ~]$ xrandr -q
Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 16384 x 16384
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 connected primary 1600x1200+0+0 (normal left inverted right x axis y axis) 432mm x 324mm
    1600x1200     60.00*+
    1400x1050     74.87    59.98
    1280x1024     75.02    60.02
    1280x960      60.00
    1152x864      75.00
    1024x768      75.03    70.07    60.00
    832x624       74.55
    800x600       72.19    75.00    60.32    56.25
    640x480       75.00    72.81    66.67    59.94
    720x400       70.08
** Note that there is an HDMI connector on the motherboard as well so I am not sure if HDMI-1 here refers to that.
I tried this:
[simon@hedgehog ~]$ xrandr --output HDMI-1 --auto --right-of DP-1
[simon@hedgehog ~]$
... but there was no output and nothing changed.
I would like to end up with a separate desktop on each monitor.
Any help gratefully received.
Simon