AppArmor parser error for /etc/apparmor.d/usr.bin.webbrowser-app in /etc/apparmor.d/usr.bin.webbrowser-app at line 26: Could not open '/usr/share/apparmor/hardware/graphics.d'

[Steve Langasek]

After upgrading to Ubuntu 18.04, the apparmor service is failed on boot because of unresolvable references from /etc/apparmor.d/usr.bin.webbrowser-app, from the removed (but not purged) webbrowser-app package.

The package itself was removed from my system as part of the upgrade to 17.10, but the presence of the obsolete conffile did not cause problems until upgrading to bionic.

I think the apparmor package needs to take care to clean up after these abandoned conffiles on upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: apparmor 2.12-4ubuntu2
ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
Uname: Linux 4.15.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Tue Apr 3 16:34:52 2018
InstallationDate: Installed on 2010-09-24 (2748 days ago)
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
KernLog:

ProcKernelCmdline: BOOT_IMAGE=/vmlinuz-4.15.0-13-generic.efi.signed root=/dev/mapper/hostname-root ro quiet splash vt.handoff=1
SourcePackage: apparmor
Syslog:

UpgradeStatus: Upgraded to bionic on 2018-03-21 (13 days ago)