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Greetings,
I’ve just installed NoMachine Server on a Pop!_OS COSMIC (Ubuntu 24.04 variant) which has two monitors.
Connecting to this machine with NoMachine from other machine on the network, I’m only able to see 1 monitor.
NoMachine was previously installed on this computer under Elementary OS =v7.1, (an Ubuntu 22.04 variant).
How can I get NoMachine server to recognize both monitors?
Thank you
chris
Greetings Chris,
Can you please check if your system recognizes correctly both monitors ? On the physical desktop, check the “xrandr -q” output from the terminal and please let us know what it is.
Another question: could it be that you have mirrored monitors ? Because in that case, it would be shown as one monitor.
Sorry,
Was out of town.
Here you go:
chris@halfpint:/$ xrandr -q
Screen 0: minimum 16 x 16, current 3840 x 1080, maximum 32767 x 32767
DP-3 connected 1920×1080+1920+0 (normal left inverted right x axis y axis) 510mm x 290mm
1920×1080 59.96*+
1440×1080 59.99
1400×1050 59.98
Here are screengrabs from Pop!_OS COSMIC:
1280×1024 59.89
1280×960 59.94
1152×864 59.96
1024×768 59.92
800×600 59.86
640×480 59.38
320×240 59.52
1680×1050 59.95
1440×900 59.89
1280×800 59.81
1152×720 59.97
960×600 59.63
928×580 59.88
800×500 59.50
768×480 59.90
720×480 59.71
640×400 59.95
320×200 58.96
1600×900 59.95
1368×768 59.88
1280×720 59.86
1024×576 59.90
864×486 59.92
720×400 59.55
640×350 59.77
DVI-I-1 connected primary 1920×1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm
1920×1080 59.96*+
1440×1080 59.99
1400×1050 59.98
1280×1024 59.89
1280×960 59.94
1152×864 59.96
1024×768 59.92
800×600 59.86
640×480 59.38
320×240 59.52
1680×1050 59.95
1440×900 59.89
1280×800 59.81
1152×720 59.97
960×600 59.63
928×580 59.88
800×500 59.50
768×480 59.90
720×480 59.71
640×400 59.95
320×200 58.96
1600×900 59.95
1368×768 59.88
1280×720 59.86
1024×576 59.90
864×486 59.92
720×400 59.55
640×350 59.77
Pop!_OS COSMIC uses Wayland whereas the previous OS, Elementary, was X11.
Thank you
chris
The output seems ok. The monitors are extended so all should work. You can use Ctrl+Alt+A shortcut to see all monitors, or Ctrl+Alt+1 (or 2) to switch between them. Check this guide out for more details: https://www.nomachine.com/support/documents/switching-the-view-between-multi-monitors-during-a-remote-desktop-session. Are you not able to switch between them?
Well,
As it turns out, the installation is inoperative. I can attach from other machines, but have no control in the window on other machines. Unfortunately, I installed from the tar archive and have no idea how to remove the server install so I can start over.
Advice?
Thank you
chris
PopOS is based on Ubuntu, so it should not be that different. The only issue we are aware of is on the latest Ubuntu 25, virtual display sessions are not possible because Ubuntu has removed support for Xorg. See this article for reference: http://www.nomachine.com/AR10W01330.
Screenshots or images which show the problem would be useful.For uninstall instructions, take a look at the installation guide: https://kb.nomachine.com/DT07S00245#2.7
sudo /opt/NX/scripts/setup/nxserver –uninstall
Then, remove the installation dir:
sudo rm -rf /opt/NX
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