Forum / NoMachine for Linux / NoMachine not recognizing dual monitors
Tagged: dual monitor
- This topic has 3 replies, 3 voices, and was last updated 1 day, 2 hours ago by
Britgirl.
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AuthorPosts
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October 2, 2025 at 22:16 #54490
doobsParticipantGreetings,
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
October 3, 2025 at 08:40 #54496
BilbotineParticipantGreetings 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.
October 7, 2025 at 09:53 #54502
doobsParticipantSorry,
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
1920×1080Â Â Â 59.96*+
1440×1080Â Â Â 59.99
1400×1050Â Â Â 59.98
Here are screengrabs from Pop!_OS COSMIC:
  1280×1024   59.89
1280×960Â Â Â 59.94
1152×864Â Â Â 59.96
1024×768Â Â Â 59.92
800×600Â Â Â Â 59.86
640×480Â Â Â Â 59.38
320×240Â Â Â Â 59.52
1680×1050Â Â Â 59.95
1440×900Â Â Â 59.89
1280×800Â Â Â 59.81
1152×720Â Â Â 59.97
960×600Â Â Â Â 59.63
928×580Â Â Â Â 59.88
800×500Â Â Â Â 59.50
768×480Â Â Â Â 59.90
720×480Â Â Â Â 59.71
640×400Â Â Â Â 59.95
320×200Â Â Â Â 58.96
1600×900Â Â Â 59.95
1368×768Â Â Â 59.88
1280×720Â Â Â 59.86
1024×576Â Â Â 59.90
864×486Â Â Â Â 59.92
720×400Â Â Â Â 59.55
640×350Â Â Â Â 59.77
DVI-I-1 connected primary 1920×1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm
1920×1080Â Â Â 59.96*+
1440×1080Â Â Â 59.99
1400×1050Â Â Â 59.98
1280×1024Â Â Â 59.89
1280×960Â Â Â 59.94
1152×864Â Â Â 59.96
1024×768Â Â Â 59.92
800×600Â Â Â Â 59.86
640×480Â Â Â Â 59.38
320×240Â Â Â Â 59.52
1680×1050Â Â Â 59.95
1440×900Â Â Â 59.89
1280×800Â Â Â 59.81
1152×720Â Â Â 59.97
960×600Â Â Â Â 59.63
928×580Â Â Â Â 59.88
800×500Â Â Â Â 59.50
768×480Â Â Â Â 59.90
720×480Â Â Â Â 59.71
640×400Â Â Â Â 59.95
320×200Â Â Â Â 58.96
1600×900Â Â Â 59.95
1368×768Â Â Â 59.88
1280×720Â Â Â 59.86
1024×576Â Â Â 59.90
864×486Â Â Â Â 59.92
720×400Â Â Â Â 59.55
640×350Â Â Â Â 59.77
Pop!_OS COSMIC uses Wayland whereas the previous OS, Elementary, was X11.
Thank you
chris
October 23, 2025 at 12:59 #54637
BritgirlKeymasterThe 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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