[X2Go-User] Client Printing not working!

[Chris]

Hi to All,

this is the setup

x2goserver: debian jessie 4.0.1.19-0x2go2+git20160621.106
mate session
cups-x2go x2goserver-printing are both installed!

The client can be debian or windows 7, both the same problem!

While printing within the session to the cups-x2go printer the debugging 
info of the x2goserver says:

Jul  4 18:01:37 DC3 /usr/bin/x2goprint[6544]: x2goprint has been called 
with options: hemsing hemsing-50-1467648002_stDMATE_dp32 
hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf 
hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf.title
Jul  4 18:01:37 DC3 /usr/bin/x2goprint[6544]: x2goprint is processing 
/var/spool/x2goprint/hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf 
with print job title ,,Test Page''
Jul  4 18:01:37 DC3 /usr/bin/x2golistmounts[6566]: db_getmounts called, 
session ID: hemsing-50-1467648002_stDMATE_dp32; return value: 
127.0.0.1|/tmp/.x2go-hemsing/spool/C-hemsing-50-1467648002_stDMATE_dp32|
Jul  4 18:01:37 DC3 /usr/bin/x2goprint[6544]: client-side spool dir is 
mounted, transferring printable file 
hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf 
to X2Go client system
Jul  4 18:01:37 DC3 /usr/bin/x2goprint[6544]: x2goprint moved file 
hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf 
to X2Go client's spool dir
Jul  4 18:01:37 DC3 /usr/bin/x2goprint[6544]: x2goprint moved file 
hemsing-50-1467648002_stDMATE_dp32_7-hemsing-cupsjob6499Cu8FC4qpYbUTjMuT.pdf.ready 
to X2Go client's spool dir, X2Go client should start the print dialog 
very soon

So the print file has been sent to the client's spool directory. I 
rechecked that by manually copying a pdf file on the server side to the 
mounted spool directory and indeed it shows up on the clients spool 
directory.
Thus, that mechanism works!

However, no client side dialogue appears.
Running the x2goclient with --debug does indeed give verbose logging, 
BUT nothing during the time of submitting the print job!

What is wrong? My setup? I can't find anything... Bug? What is the 
mechanism to trigger the client's printing dialog??
It does not seem to get triggered. Also, there is no file left over in 
the client's spool directory.

Cheers
Chris