Kubuntu 25.04 KDE Wayland black screen (NM 9.0.188)

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  • #53223
    theblackhole
    Participant

    Hello,

    I’ve never been able to get NoMachine to work with Plasma Wayland (KDE), even with NoMachine 8 and Ubuntu 24.

    Whenever I try to log in to this PC with a NoMachine client (Windows or Android), I get a black screen where I can see and move the cursor, but that’s it.

    It works perfectly fine with Plasma X11 but I would love to finally switch to Wayland and NoMachine is the only thing that prevents me to do it.

    I emailed you the log file in debug mode:

    – 2025-05-31 14:55 is the first attempt with a fresh NoMachine installation (all configuration and logs deleted), so the configuration is set to default.

    – 2025-05-31 14:57 is the second attempt after changing “WaylandModes egl,drm,compositor” to “WaylandModes drm,egl,compositor” in /usr/NX/etc/node.cfg and restarting the server.

    —– Server :
    OS : Ubuntu 25.04 (plucky)
    Kernel : 6.14.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Sun AprĀ  6 15:05:05 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
    NoMachine : Nomachine for Linux 9.0.188 (used to share an already opened desktop session)
    GPU driver : nvidia-driver-575 (575.51.02-0ubuntu0~gpu25.04.1)
    Misc : triple screen

    —– Clients :
    – NoMachine 1.0.186 on OxygenOS 14 (Android 14)
    – NoMachine Enterprise Client 9.0.188 on Windows 11 24H2

    #53284
    fra81
    Moderator

    Hi,

    can you please run these 3 commands in a terminal on the server and show us the output?

    1 echo $LD_PRELOAD

    2 ls -l /etc/xdg/plasma-workspace/env

    3 sudo getcap /usr/bin/kwin_wayland

     

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