Bug#892525: cups-daemon: Cannot print with HPLIP backend

[intrigeri@debian.org]

Package: cups-daemon
Version: 2.2.6-5
Severity: normal

Hi,

for now this bug report is mostly a note to myself (and to whoever
wants to help investigating/fixing this problem).

A few days ago on an up-to-date sid system I was unable to print with
the HPLIP backend. In the Journal I saw:

  /hpfax[4306]: [4306]: error: Failed to create /var/spool/cups/tmp/.hplip

I don't know yet if this issue is AppArmor-related and will
investigate once I have access to that printer again in a few days.
/usr/lib/cups/backend/hpfax is supposed to be confined under the
third_party child profile which allows any "file" operation so in
theory AppArmor cannot trigger the above log line.

(Probably unrelated, on cupsd startup I see:

  audit[14628]: AVC apparmor="DENIED" operation="capable"
  profile="/usr/sbin/cupsd" pid=14628 comm="cupsd" capability=12
  capname="net_admin"

I'll file a dedicated bug (+patch) for that one once I've confirmed
it's orthogonal to the HPLIP issue.)

Cheers,
-- 
intrigeri