BLOCK_SUSPEND is a capability in newer kernels. 'deny capability
block_suspend,' is found in the 12.10 CUPS profile, which is fine since
the 12.10 kernel has it and the apparmor userspace for 12.10 was
compiled against the 12.10 kernel headers. However, on 12.04 the
apparmor userspace was compiled with older headers and so it doesn't
understand this rule.
tlu, what version of cups are you using? Can you give the output of:
$ apt-cache policy cups
** Changed in: cups (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1052098
Title:
AppArmor parser error for /etc/apparmor.d/usr.sbin.cupsd
Status in “cups” package in Ubuntu:
Incomplete
Bug description:
My HP printer suddenly didn't work anymore, and /var/log/syslog
reported for udev-configure-printer:
"failed to connect to CUPS server; giving up"
I decided to reinstall cups and hplip and got the following error
messages:
"AppArmor parser error for /etc/apparmor.d/usr.sbin.cupsd in
/etc/apparmor.d/usr.sbin.cupsd at line 18: Invalid capability
block_suspend."
... and:
"start: Job failed to start
invoke-rc.d: initscript cups, action "start" failed."
... resulting in errors related to dpkg (dependencies problems).
After commenting out the line
capability block_suspend,
in /etc/apparmor.d/usr.sbin.cupsd, all is well: Reinstalling cups and
hplip was successful and my printer works again.
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