NoMachine not recognizing dual monitors

[doobs]

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

[Bilbotine]

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.

[doobs]

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

 

[Britgirl]

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?

[Author]

Posts