[X2Go-User] x2go session failure because of unknown "localhost"

[flegoff]

Hello list,

I have been using x2go without issues for a long time until recently. Both client and server are running on Linux machines.

I can connect to the server (via an SSH proxy). I get the "New session started" notification. But the session is apparently terminated because tere is some error resoling the display server.

I copy pasted the log messages in the enclosed file. I think the important part is this:

Loop: WARNING! Overriding auxiliary X11 port with new value '1'.
Warning: Overriding auxiliary X11 port with new value '1'.
Info: Using abstract X11 socket in kernel namespace for accessing DISPLAY=:0.
Error: Failed to resolve address of 'localhost'.
Loop: PANIC! Unknown remote host 'localhost'.
Error: Unknown remote host 'localhost'.
Session: Session terminated at 'Fri Jun 19 22:50:42 2020'.

As far as I remember I haven't changed client or server configuration. I did switch from using Published App sessions to Xfce session to I have installed Xfce on the server. Published App sessions do not work either now.

Any idea what is going on here? Or how to debug this?

Cheers,
Fabrice
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