Cannot connect to server on Ubuntu Mate 20.04

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  • #28109

    I’ve been using Ubuntu 18.04 on a Raspberry Pi3 (ARMv7) with NoMachine and it was working fine connecting to it from a Windows client. Now I’ve upgraded to Ubuntu 20.04 and I cannot connect anymore and it’s telling me that no available sessions on this server. I have noticed the a huge number of entries are created under the /usr/NX/var/log/node directory, 24960 entries in about 48 hours and the session files contain this:

    NXAGENT – Version 6.10.12


    Copyright (C) 2001, 2019 NoMachine.

    See for more information.


    Session: Starting session at Sat Jun 13 03:39:02 2020.

    Info: Agent running with pid 22825.

    Info: Slave server running with pid 22838.

    Info: Display running with pid 22839.

    Info: Listening to slave connections on port 12001.

    Info: Audio client started with pid 22847.

    Info: Audio server started with pid 22846.

    Info: Display server started with pid 22848.

    /usr/NX/bin/nxnode.bin: symbol lookup error: /usr/NX/lib/ undefined symbol: __pow_finite


    Attached is the archive containing the log files. I have deleted most of the entries from /usr/NX/var/log/node.


    The symbol lookup error is a kernel-related issue. Reverting to an earlier kernel version is suggested for the time-being. We have opened a Trouble Report (please sign up to receive notification).


    My linux image is:


    But the ticket mentions kernel version 5.4.42 and later.


    I also have a regular PC (x86_64) with the same kernel version on Ubuntu 20.04 and NoMachine is working fine on it.

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