Are there "audit" messages in the syslog file (of the host, of the chroot)?
Can you try to run CUPS in aa-complain mode of AppArmor?
Can you run CUPS in debug mode and supply the error_log file?
Are there "audit" messages in the syslog file (of the host, of the chroot)?
Can you try to run CUPS in aa-complain mode of AppArmor?
Can you run CUPS in debug mode and supply the error_log file?