plank do not start with mate and x2go (wrong initialisation of XDG_SESSION_TYPE)

[sol]

Hello,

plank do not start when running mate desktop with x2go.

trying manual run show :
[CRITICAL 08:57:08.079851] [AbstractMain:255] Only X11 environments are supported.

The env var XDG_SESSION_TYPE contains 'tty'.

Plank can start with this command line :

XDG_SESSION_TYPE=x11 plank

As a quick and dirty fix I run manually every time i start a new remote session :
XDG_SESSION_TYPE=x11 nohup plank >/dev/null

I dont know if it is a mate-desktop, plank or x2go bug ?

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: plank 0.11.89-1
ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
Uname: Linux 5.4.0-52-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: MATE
Date: Mon Nov 9 08:54:04 2020
InstallationDate: Installed on 2020-02-03 (279 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
SourcePackage: plank
SuspiciousXErrors.txt:

UpgradeStatus: Upgraded to focal on 2020-06-29 (132 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.