This is what syslog says:
apparmor="DENIED" operation="connect" profile="/usr/lib/cups/backend/cups-pdf" name="/run/samba/winbindd/pipe" pid=15076 comm="cups-pdf" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
So, in /etc/apparmor.d/usr.sbin.cupsd a new entry has to be entered:
/run/samba/winbindd/pipe rw,
This is what syslog says: "/usr/lib/ cups/backend/ cups-pdf" name="/ run/samba/ winbindd/ pipe" pid=15076 comm="cups-pdf" requested_mask="wr" denied_mask="wr" fsuid=0 ouid=0
apparmor="DENIED" operation="connect" profile=
So, in /etc/apparmor. d/usr.sbin. cupsd a new entry has to be entered: samba/winbindd/ pipe rw,
/run/