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

[Brian Potkin <claremont102@gmail.com>]

On Sun 14 Feb 2021 at 01:04:57 +0100, mh wrote:

> Am Sat, 13 Feb 2021 23:30:04 +0000
> schrieb Brian Potkin <claremont102@gmail.com>:
> 

[...]

> > Thank you for your report, Michael, Let's see what we can do about
> > this.
> >
> > Are you using a USB connection? If so, give what you get for
> >
> 
> Hi Brian,
> 
> thanks for trying to help.
> 
> Yes, I am using an USB connection.
> 
> 
> >   lsusb -v | grep -A 3 bInterfaceClass.*7
> 
> 
>  bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      2 Bidirectional
>       iInterface              4 OKI B432 Printer
> --
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      4
>       iInterface              6 OKI B432 IPP0
> --
>       bInterfaceClass         7 Printer
>       bInterfaceSubClass      1 Printer
>       bInterfaceProtocol      4
>       iInterface              9 OKI B432 IPP1

Michael, don't forget to mail the bug; I sent the last one there for
you.

"bInterfaceProtocol      4" indicates that the printer understands
IPP=over-USB. Now give

  systemctl list-units "ipp-usb*" | grep service

and

  lpstat -t

Regards,

Brian.
> 
> 
> >
> > Regards,
> >
> > Brian.