[cups] IPP printing on brother MFC-L2710DN spits out blank pages

[Brian Potkin]

On Fri 27 Mar 2020 at 18:09:01 +0100, Fina Wilke wrote:

> On Thu, 2020-03-26 at 09:00 +0000, Brian Potkin wrote:
> > Which OS and version? Which version of cups-browsed?
> > 
> 
> Arch Linux (most recent, kernel 5.5.10) cups-browsed 1.27.3.
> 
> > Set up this print queue:
> > 
> > lpadmin -p L2710 -v ipp://Brother%20MFC-L2710DN._ipp._tcp.local -E -m
> > everywhere
> 
> This works.
> 
> It brought me to the root of the problem too: This seems to actually be
> an issue with automatically adding the printer via avahi and probably
> some sort of bug with my desktop environment (gnome 3.36) rather than
> with cups.
> 
> If I use cups-browsed the printer that is automatically added seems to
> work too.
> 
> I initially thought that gnome/gtk would just use cups-browsed but this
> is actually not the case. I don't even know if they use cups at all for
> those autodiscovered printers. I will file a bug with gnome/gtk. I
> don't understand why they can't just use cups-browsed but try to be
> clever here and reimplement its functionality in a seemingly broken
> way. My bad, sorry.

I am not familiar with Arch or Gnome so cannot help there.

> > 
> > Can you print to L2710?
> > 
> > Also, please give the output of (as root)
> > 
> > cupsfilter -p /etc/cups/ppd/THE_BROTHER_PPD -m printer/foo -e
> > --list-filters /etc/nsswitch.conf
> 
> $ sudo cupsfilter -p /etc/cups/ppd/L2710.ppd -m printer/foo -e --list-
> filters /etc/nsswitch.conf
> texttopdf
> pdftopdf
> gstoraster
> rastertopwg
> 
> Generating a ppd with
> $ driverless ipp://Brother%20MFC-L2710DN._ipp._tcp.local/ > brother.ppd
> 
> yields the same result with cupsfilter.

When cups-browsed is started it generates a PPD in /etc/cups/ppd. Do
you get the same four filters being used when this PPD is used with
the cupsfilter command?

Cheers,

Brian.