Firstly, it does not look like you are using the official raspberry pi kernel for Xenial. Your kernel is 4.1, and the Xenial kernel is 4.4, so it is possible that the kernel you are using does not have the required apparmor bits that Ubuntu needs.
As for the error, does journalctl contain any more information WRT brltty, and does systemctl status brltty also contain any more information? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to brltty in Ubuntu. https://bugs.launchpad.net/bugs/1654546 Title: brltty.service: Failed at step SECCOMP spawning /bin/sh: Invalid argument Status in brltty package in Ubuntu: New Bug description: I get this logged in the journal every 30 seconds. Running Ubuntu Mate 16.10 on a raspberr pi2. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: brltty 5.3.1-2ubuntu2.1 Uname: Linux 4.1.19-v7+ armv7l ApportVersion: 2.20.1-0ubuntu2.4 Architecture: armhf CurrentDesktop: MATE Date: Fri Jan 6 12:13:12 2017 SourcePackage: brltty UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/brltty/+bug/1654546/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
