Use Ubuntu 16.04 LTS, what happened was the following. All the connections stopped working from one moment to another, I had a fault in the internet, the networks fell but when the internet came back, the connection did not work again either wired or wireless, neither by bluetooth nor by usb, and gives that error when I frame journalctl -xe :

kernel: audit: type=1400 audit(1549657329.185:141): apparmor="DENIED" operation="open" profile="/usr/lib/NetworkManager/nm-dhcp-helper" name="/usr/lo"

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.