Description of problem:

ssh-x-forwarding.sh has a check to see if $DISPLAY is local:

[ "${DISPLAY:0:1}" = ":" ] && return

but ssh-x-forwarding.csh does not have the equivalent check. This causes a new temporary dbus session to get started when a user with a tcsh login shell starts an X2Go session. I've filed a PR here with a fix:

https://git.centos.org/rpms/dbus/pull-request/1

Version-Release number of selected component (if applicable):
dbus-x11-1.12.8-24.el8.x86_64

How reproducible:
Every time

Steps to Reproduce:
1. User with tcsh/csh connects via X2Go
2. Suspend and resume session
3. dbus required items (launching KDE system settings) fail