I finally got to check the status of this on Ubuntu 17.04. Same computer but upgraded ubuntu.
Print from LibreOffice gave this in log (dmesg):
[491184.232027] audit: type=1400 audit(1496903835.766:41): apparmor="DENIED" operation="capable" profile="/usr/sbin/cupsd" pid=21237 comm="lpd" capability=12 capname="net_admin"
Applying the workaround resulted in no apperrors in dmesg.
I finally got to check the status of this on Ubuntu 17.04. Same computer but upgraded ubuntu. 5.766:41) : apparmor="DENIED" operation="capable" profile= "/usr/sbin/ cupsd" pid=21237 comm="lpd" capability=12 capname="net_admin"
Print from LibreOffice gave this in log (dmesg):
[491184.232027] audit: type=1400 audit(149690383
Applying the workaround resulted in no apperrors in dmesg.