[X2go-dev] Central CUPS server not sending print jobs to physical desktop

[John A. Sullivan III]

On Sat, 2010-02-13 at 23:30 -0500, John A. Sullivan III wrote:
> Hello, all.  We finally have our central CUPS server running after
> learning more than we ever wanted to know about NSS, LDAP, groups, and
> CUPS authentication! The CUPS server is running on Lenny and we have
> installed cups-x2go.  We have NOT installed x2goprint as it our
> understanding from reading the documentation that it is not necessary on
> the CUPS server but only on the X2Go Server.  Is this correct?
> 
> We edited the client's .kdeprintrc file to point to the central cups
> server.  The client does have x2goprint installed and both the user and
> x2goprint are members of the fuse group.  The client uses a non-standard
> SSH port for security reasons.  We restrict access to the desktop
> printers to the desktop users.  Only I can print to my desktop printer
> and only Susie can print to Susie's desktop printer.  
> 
> When we print on the client to the X2Go-CUPS printer, the print job
> shows as successful but the print dialog never appears on the physical
> desktop.  The CUPS logs show a successful print job but no popup.
> 
> We have set up dsa key access.  If we do a ssh
> -i /root/.x2go/ssh/.x2goprint/id_dsa x2goprint@<virtual desktop>, it
> works - we open an ssh console without being prompted.  We have accepted
> the keys into the known_hosts file for both the short and fully
> qualified name.  The strange thing is that a packet trace shows no SSH
> traffic.  There is plenty of CUPS traffic but the CUPS server never
> tries to communicate with the virtual desktop via SSH.
> 
> If we use a local CUPS server instead, the X2Go print popup works just
> fine - very impressive.  We have tried the setup with the local CUPS
> server both enabled and disabled.  No difference.
> 
> What have we missed? Why does the central CUPS server not even try to
> send the job to the virtual desktop? How can we troubleshoot it further?
> We see nothing suspicious in the logs including the auth logs.  Thanks -
> John
> 

Hello, again.  I'm about to dive into this problem.  Any pointers would
be greatly appreciated.  Does anyone have the print server running on a
central CUPS server? Thanks - John