Linux desktop frozen when connecting with NoMachine

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  • #33798
    coufinou
    Participant

    Hello, maybe someone here can help me …

    I installed the free version of NoMachine on a Linux machine (Ubuntu 20.04) to get remote access from another Windows PC. It works fine, except that the normal Linux machine screen is now frozen with just a fixed cursor on top left.

    When I look at the screen configuration of the Linux machine with xrandr, I get :

    Screen 0: minimum 640 x 480, current 1536 x 864, maximum 16384 x 16384
    nxoutput0 connected 1536×864+0+0 390mm x 219mm
    2560×1440     60.00 +
    ….

    And no others screen. So it seems that NoMachine has disabled all the screens except a virtual “nxoutput0”.

    When I try to restart the Xorg configuration (sudo Xorg -configure, with the x server stopped), I get the error

    Number of created screens does not match number of detected devices.
    Configuration failed.
    (EE) Server terminated with error (2). Closing log file.

    Any idea?

     

    #33813
    graywolf
    Moderator

    Hello. The screen nxoutput0 is in virtual NoMachine sessions. So the remote access is not using an existing Xorg display. It looks like the Xorg display on your server failed for misconfiguration. “Number of created screens does not match number of detected devices” means that you have too many Device sections in you xorg.conf. I would rename existing xorg.conf and xorg.conf.d/* into backup files then retry to configure Xorg from scratch.

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