printing issues

[Gary J. Kirkpatrick]

On Fri, Nov 23, 2018 at 4:00 PM Brian <ad44 at cityscape.co.uk> wrote:

> On Fri 23 Nov 2018 at 14:37:03 +0100, Gary J. Kirkpatrick wrote:
>
> [Snip]
>
> >   lp -d DeskJet-3630-series /etc/nsswitch.conf
> > request id is DeskJet-3630-series-50 (1 file(s))
> >
> >  lp -d DeskJet_3630new /etc/nsswitch.conf
> > request id is DeskJet_3630new-51 (1 file(s))
> >
> > Print quality very good although off the margin on left
>
> Good. Both these HPLIP queues use the same filters. The margin issue is
> minor.
>
> > Then  systemctl stop cup
> > Failed to stop cup.service: Unit cup.service not loaded.
>
> cup.service is an invalid service name. I actually gave cups-browsed as
> the service to stop. This was only to demonstate to you that the queue
> which keeps coming back is managed by cups-browsed.
>
> > gary18 at gary18:~$   lp -d HP_DeskJet_3630_series_61C73D_
> /etc/nsswitch.conf
> > request id is HP_DeskJet_3630_series_61C7
> >
> > It printed again, same as above.
>
> Good. This is a driverless queue auto-created by cups-browsed. It has
> nothing to do with HPLIP.
> >
> > I have 3 printers listed under Devices
>
> There are three devices shown by 'lpstat -t'.
>
> > Note I use both the 18.04 and the Unity interfaces.  I may have used a
> > third interface.
>
> The interface used shouldn't matter.
>
> > I think I answered everything you asked.
>
> You have indeed, and it shows you have a working printing system. You
> can, if you wish, do more testing with a more varied selection of files
> printed with different applcations.
>
> Here is what I would do on your system for printing:
>
> 1. Decide whether to use one or other of the USB or wireless connections.
>
> 2. If USB is chosen, delete the two HPLIP queues. You could also purge
>    HPLIP from the system as it is no longer used.
>
> 3. If wireless is chosen, uncomment "CreateIPPPrinterQueues All" in
>    /etc/cups/cups-browsed.conf" and restart cups-browsed. Delete the two
>    HPLIP queues. You could also purge HPLIP as it is no longer used.
>
> Keep things simple; you do not need USB and wireless at the same time.
> And, by using driverless printing, all HPLIP bugs can be avoided and
> nobody need bother about installing non-free plugins for printing ever
> again.
>
> --
> Brian.
>
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>


As I mentioned, printing is now fine.  However scanning does not.  simple
scan says no scanner detected.

 # sane-find-scanner will now attempt to detect your scanner. If the
  # result is different from what you expected, first make sure your
  # scanner is powered up and properly connected to your computer.

  # No SCSI scanners found. If you expected something different, make sure
that
  # you have loaded a kernel SCSI driver for your SCSI adapter.

could not open USB device 0x1d6b/0x0003 at 002:001: Access denied
(insufficient permissions)
could not open USB device 0x04f3/0x0335 at 001:005: Access denied
(insufficient permissions)
could not open USB device 0x8087/0x07dc at 001:004: Access denied
(insufficient permissions)
could not open USB device 0x046d/0xc534 at 001:003: Access denied
(insufficient permissions)
could not open USB device 0x174f/0x14b7 at 001:002: Access denied
(insufficient permissions)
could not open USB device 0x1d6b/0x0002 at 001:001: Access denied
(insufficient permissions)
  # No USB scanners found. If you expected something different, make sure
that
  # you have loaded a kernel driver for your USB host controller

Any suggestions?


garyk
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