a network printer connected to a router via usb. The printer seems to be recognized, but is always "in use" when trying to print.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: cups 1.7.5-3ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
Uname: Linux 3.16.0-22-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu7
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Oct 16 08:47:45 2014
InstallationDate: Installed on 2014-08-29 (48 days ago)
InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140826.1)
Lpstat: device for HPEnvy4500: ipp://192.168.0.1:631/LP1
Lsusb:
Bus 001 Device 003: ID 058f:6377 Alcor Micro Corp. Multimedia Card Reader
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: HP-Pavilion KJ300AA-A2L a6418f
Papersize: letter
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/HPEnvy4500.ppd'] failed with exit code 2: grep: /etc/cups/ppd/HPEnvy4500.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-22-generic root=UUID=4b5d1c91-ba08-43ff-9634-8626f3d79daf ro quiet splash
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/25/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 5.14
dmi.board.name: Nettle3
dmi.board.vendor: ECS
dmi.board.version: 2.1
dmi.chassis.type: 3
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr5.14:bd03/25/2008:svnHP-Pavilion:pnKJ300AA-A2La6418f:pvr:rvnECS:rnNettle3:rvr2.1:cvnHewlett-Packard:ct3:cvr:
dmi.product.name: KJ300AA-A2L a6418f
dmi.sys.vendor: HP-Pavilion
I'm quite sure this is due to the 'unix' apparmor denials.
You should be able to workaround this by adding the following to /etc/apaprmor.
unix peer=/usr/