Am Sun, 14 Feb 2021 13:06:09 +0000
schrieb Brian Potkin <claremont...@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 <claremont...@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 982...@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.
> and disconnected?
(printer switched off)
~# systemctl status ipp-usb
● ipp-usb.service - Daemon for IPP over USB printer support
Loaded: loaded (/lib/systemd/system/ipp-usb.service; static)
Active: inactive (dead)
Docs: man:ipp-usb(8)
Feb 14 14:01:53 neutower systemd[1]: Started Daemon for IPP over USB
printer support. Feb 14 14:37:24 neutower systemd[1]: ipp-usb.service:
Succeeded. Feb 14 14:38:18 neutower systemd[1]: Started Daemon for IPP
over USB printer support. Feb 14 14:38:18 neutower systemd[1]:
ipp-usb.service: Succeeded.
>
> > >
> > > and
> > >
> > > lpstat -t
> >
> > # lpstat -t
> > Zeitplandienst läuft
> > Keine systemvoreingestellten Ziele
> > lpstat: Keine Druckziele hinzugefügt.
> > lpstat: Keine Druckziele hinzugefügt.
> > lpstat: Keine Druckziele hinzugefügt.
> > lpstat: Keine Druckziele hinzugefügt.
> >
> > Meaning:
> > time table service running
> > No preconfigured system targets
> > lpstat: No printing targets added.
>
> This is the expected output if ipp-usb is not active.
>
> > BTW: I had IPP-USB configured once, but for that to happen I had to
> > connect the printer using a LAN cable. And I could not print either.
> > But there may have been other misconfigurations be involved, too,
> > as I didn't really understand how to configure a LAN connection for
> > the printer.
>
> IPP-over-USB is for a USB connection only. See sections 13, 14 and 15
> at
>
> https://wiki.debian.org/CUPSDriverlessPrinting
Thanks for the info.
>
>
> > *As a layman* I am guessing whether this USB mess happens due to
> > timing issues (live ISO is runing in RAM, so runs very responsive).
> > Shouldn't any solution involve solving the apparent conflict
> > between libusb and usblp?
>
> I am not skilled in USB matters and first wanted to discover whether
> the printing system is working as designed.
Ok, understood.
>
> Regards,
>
> Brian.
Greetings from Germany
Michael
