Bug#926309: I found the 'problem'

Sat May 18 15:35:15 BST 2019

I did some more debugging by echoing $@ at various places and finally
narrowed it down to the reading of the profile files that happens at the
top of /etc/gdm3/Xsession ...

It turned out my $HOME/.profile file had the line 'set GDK_DISPLAY based
on session type', which should have been a comment but wasn't. Hence,
this line got interpreted as a command to set $@ ...

I guess this issue can be closed.

Kind regards,
Matijs van Zuijlen

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