So the apparmor_parser -v bug? No.
That apparmor is causing a failure for your scanner, that is a
possibility I can't rule out yet but haven't seen anything to indicate
it is causing the issue.
can you try running through
ps -Z `pidof cupsd`
sudo bash -c "echo /usr/sbin/cupsd >/sys/kernel/security/apparmor/.remove"
sudo bash -c "echo /usr/lib/cups/backend/cups-pdf
>/sys/kernel/security/apparmor/.remove"
sudo aa-status
ps -Z `pidof cupsd`
sudo restart cups
ps -Z `pidof cupsd`
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https://bugs.launchpad.net/bugs/1187970
Title:
apparmor prevents custom printer driver from executing
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