My production environment is debian/jessie but the same problematic
behaviour is present in fedora 21 (x2goserver from default repo) and
ubuntu 14.10 (ppa:x2go/stable)

I don't think it's something directly related to x2go but you might have
way more insight in the process of the session management and can
provide me with more hints to where the problem could actually be.



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 Florian Wicke

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