Bug#982742: cups: config of usb printer now impossible due to usblp and libusb conficting (used to work!)

[mh <m.hatzold@web.de>]

Am Sun, 14 Feb 2021 14:35:53 +0000
schrieb Brian Potkin <claremont102@gmail.com>:

> On Sun 14 Feb 2021 at 14:47:42 +0100, mh wrote:
> 
> > Am Sun, 14 Feb 2021 13:06:09 +0000
> > schrieb Brian Potkin <claremont102@gmail.com>:
> >   
> > > On Sun 14 Feb 2021 at 12:56:11 +0100, mh wrote:
> > >   
> > > > Am Sun, 14 Feb 2021 11:21:45 +0000
> > > > schrieb Brian Potkin <claremont102@gmail.com>:
> > > >     
> > > > > Michael, don't forget to mail the bug; I sent the last one
> > > > > there for you.    
> > > > 
> > > > Thanks. I wondered whether I should respond to your mail
> > > > address. Now I did CC 982742@bugs.debian.org if that's what you
> > > > suggested.    
> > > 
> > > That's better. Thanks.
> > >    
> > > > > 
> > > > > "bInterfaceProtocol      4" indicates that the printer
> > > > > understands IPP=over-USB. Now give
> > > > > 
> > > > >   systemctl list-units "ipp-usb*" | grep service    
> > > > 
> > > > # systemctl list-units "ipp-usb*" | grep service
> > > > ~#    
> > > 
> > > An empty output is unexpected. What happens with
> > > 
> > >   systemctl start ipp-usb
> > > 
> > > and
> > > 
> > >   systemctl status ipp-usb
> > > 
> > > with the printer connected   
> > 
> > # systemctl start ipp-usb
> > ~#
> > 
> > # systemctl status ipp-usb
> > ● ipp-usb.service - Daemon for IPP over USB printer support
> >      Loaded: loaded (/lib/systemd/system/ipp-usb.service; static)
> >      Active: active (running) since Sun 2021-02-14 14:01:53 CET;
> > 32min ago Docs: man:ipp-usb(8)
> >    Main PID: 854 (ipp-usb)
> >       Tasks: 10 (limit: 4634)
> >      Memory: 7.9M
> >         CPU: 52ms
> >      CGroup: /system.slice/ipp-usb.service
> >              └─854 /sbin/ipp-usb udev
> > 
> > Feb 14 14:01:53 neutower systemd[1]: Started Daemon for IPP over USB
> > printer support  
> 
> That's exactly what should happen. cups-browsed should now install a
> queue. Anything from 'lpstat -t' now? 

Nothing

> How about 'lpstat -l -e' and

Nothing

> 'avahi-browse -rt _ipp._tcp'?

Nothing


But to be clear: Currently there is *no printer installed* here in this
system. It has been, but as I could not print I purged cups* entierly
and than reinstalled it as described in my initial report. And now in
the cups admin webpanel no Oki or USB printer is visible to select a PPD
file for (whereas it works fine and reliably in a live ISO system).

> 
> Regards,
> 
> Brian.

Greetings

Michael