NoMachine not recognizing dual monitors

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  • Author
    Posts
  • #54490
    doobs
    Participant

    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

    #54496
    Bilbotine
    Participant

    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.

    #54502
    doobs
    Participant

    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

     

    #54637
    Britgirl
    Keymaster

    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?

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