[cups] Debugging "Unable to send data to printer."

[Johannes Meixner]

Hello,

On Sep 27 20:47 Nicolas Schmidt wrote (excerpt):
> USB printer on an OpenBSD server
...
> D ... [Job 14] libusb write operation returned fffffff4.

I can neither help with libusb issues
nor with issues on OpenBSD but...

> if I do
>
> echo ?Hello World!? > /dev/ulpt0
>
> I get a printout.

...at least as a workaround you may use a selfmade backend
that implements sending to /dev/ulpt0 as described at
"A careless backend for a single USB printer" in
https://en.opensuse.org/SDB:Using_Your_Own_Backends_to_Print_with_CUPS


Kind Regards
Johannes Meixner
-- 
SUSE LINUX GmbH - GF: Felix Imendoerffer, Jane Smithard,
Graham Norton - HRB 21284 (AG Nuernberg)