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When using OCI Ampere ARM VM there with MATE configured as DE (which is working fine, but slow when connecting via xrdp) I’m getting the following two errors on NoMachine 9.3.7 ARM which prevents me to connect to it:
Ubuntu ERROR! Error reply ‘ERR Background save already in progress’.
NXSERVER WARNING! NXLocalSession: Cannot retrieve node socket for session ED9887D15FF66182BAF8423191C12070.
89886 89886 2026-02-25 10:58:55 196.546 NXSERVER Process initialized with arguments ‘–restart’.
90022 90022 2026-02-25 10:58:56 577.154 NXSERVER Starting RS 9.3.7 and services.
90022 90022 2026-02-25 10:58:56 577.224 NXSERVER Process initialized with arguments ‘–daemon’.
90022 90022 2026-02-25 10:58:56 577.249 NXSERVER System information: Ubuntu 24.04.4 LTS, standalone.
Info: Handler started with pid 90108 on Wed Feb 25 10:59:02 2026.
Info: Handling connection from 127.0.0.1 port 60030 on Wed Feb 25 10:59:02 2026.
90108 90108 2026-02-25 10:59:03 373.675 NXSERVER Connected from remote machine ‘127.0.0.1’ using protocol ‘NX’.
90108 90108 2026-02-25 10:59:03 373.743 NXSERVER Process initialized with arguments ‘-c /etc/NX/nxserver –login -H 21’.
90108 90108 2026-02-25 10:59:03 792.830 NXSERVER User ‘ubuntu’ logged in from ‘127.0.0.1’ using authentication method NX-password.
90108 90123 2026-02-25 10:59:03 806.573 NameEvent/NameEvent: ERROR! Error reply ‘ERR Background save already in progress’.
90158 90158 2026-02-25 10:59:06 398.114 NXSERVER Connected from remote machine ‘127.0.0.1’ using protocol ‘NX’.
90158 90158 2026-02-25 10:59:06 398.224 NXSERVER Process initialized with arguments ‘–virtualsession –sessionid BB293AADE735B65AAF52CA1761490789’.
90158 90158 2026-02-25 10:59:08 521.379 NXSERVER WARNING! NXLocalSession: Cannot retrieve node socket for session ED9887D15FF66182BAF8423191C12070.
Info: Connection from 127.0.0.1 port 60030 closed on Wed Feb 25 10:59:08 2026.
Info: Handler with pid 90108 terminated on Wed Feb 25 10:59:08 2026.
90108 90108 2026-02-25 10:59:09 703.699 NXSERVER User ‘ubuntu’ from ‘127.0.0.1’ logged out.
90108 90108 2026-02-25 10:59:09 704.613 NXSERVER Remote machine ‘127.0.0.1’ disconnected.
I’ve saw similar issue was already described here: https://forum.nomachine.com/topic/cannot-connect-ubuntu-24-04-lts
with the following workaround: “In case there is no actual monitor connected to the GPU, NoMachine was not able to connect, with not exactly explanatory error. After “fake monitor” dongle has been plugged in – issue self-resolved.”
which is unfortunately not the case for me – I’m using OCI Ampere ARM VM there with MATE configured as DE
Would appreciate any hint for resolving the case.
ubuntu@training:~$ sudo /usr/NX/bin/nxserver –status
NX> 111 New connections to NoMachine server are enabled.
NX> 161 Enabled service: nxserver.
NX> 162 Disabled service: nxnode.
NX> 161 Enabled service: nxd.
ubuntu@training:~$ cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=24.04
DISTRIB_CODENAME=noble
DISTRIB_DESCRIPTION=”Ubuntu 24.04.4 LTS”
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