[cups] Printing cups -> ipp -> cups -> usb with local drivers

[Simon Peeters]

On do, 2016-03-31 at 12:17 +0200, Johannes Meixner wrote:
> Hello,
> 
> On Mar 31 02:36 Vadim A. Misbakh-Soloviov wrote (excerpt):
> > 
> > ... Generic/Foomatic_Postscript seems to print normally,
> q.e.d. - cf.
> http://www.cups.org/pipermail/cups-devel/2015-September/016450.html
> 
> In general when sending printer-specific data to a CUPS server
> one must ensure that no duplicate filtering happens.
> 
> 
> > 
> > but unable to clean heads.
> > So... Unfortunatelly, "Raw Queue" isn't a solution
> > (until this is a bug).
> "Unfortunatelly" your kind of setup cannot work reliably.

It cannot, except for the fact that it did, and still does when the
client uses windows.

> You cannot have two drivers in a row and expect that it
> "magically just works" and on top of that additionally
> expect that special printer maintenance functionality
> ("clean heads") even works indirectly via network
> for a "dumb" USB printer.
> 
> Do printer maintenance functionality on the computer
> where the USB printer is directly connected to and
> on clients in the network use the recommended setup for
> clients in the network (cf. Till Kamppeter's postings)
> or submit printer-specific data to a raw queue on
> the CUPS server to avoid duplicate filtering.
> 
> 
> Kind Regards
> Johannes Meixner