OT: HP drivers

[Brian]

On Wed 14 Sep 2022 at 12:19:02 -0700, MR ZenWiz wrote:

> On Wed, Sep 14, 2022 at 2:11 AM Brian <claremont102 at gmail.com> wrote:
> >
> :
> >
> >  lsusb -v | grep -A 3 bInterfaceClass.*7
> $ sudo lsusb -v | grep -A 3 bInterfaceClass.*7
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      4
>       iInterface              0
> --
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      2 Bidirectional
>       iInterface              0
> --
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      4
>       iInterface              0
> --
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      4
>       iInterface              0

The 7/1/4 sequence shows the OfficeJet 4650 as indeed providing the
IPP-over-USB protocol. That means the 'scanimage -L' output should
have an second entry beginning "airscan:...". So why doesn't it?

Try the command again after disconnecting and reconnecting to USB.
Also

  Systemctl status ipp-usb

should show the service as loaded and active.

Firewall? Port 5353 filtered?
 
> > ipp-usb and sane-airscan should be on the system by default. It is
> > worth checking:
> >
> >  dpkg -l ipp-usb sane-airscan
> >
> $ sudo dpkg -l ipp-usb sane-airscan
> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name           Version         Architecture Description
> +++-==============-===============-============-===============================>
> ii  ipp-usb        0.9.20-1        amd64        Daemon for IPP over USB printer>
> ii  sane-airscan   0.99.27-1build1 amd64        SANE backend for AirScan (eSCL)>

That's precisely as it should be.

-- 
Brian.