HP Printer problem

[weha]

I have the cheapest printer I could find locally. HP Deskjet 1000 usb printer. Lately I am unable to print unless I first remove the printer, reboot, and then reinstall it. That works, but not always.
I have tried all 6xusb ports but no go, unless I reinstall as mentioned above.
The error messages in syslog indicate that apparmor may be the cause.
Here are some of the related error messages:

apparmor="DENIED" operation="signal" profile="/usr/sbin/cupsd" pid=11706 comm="cupsd" requested_mask="send" denied_mask="send" signal=term peer="unconfined"

hp-systray(hpdio)[2034]: error: Unable to communicate with device (code=12): hp:/usb/Deskjet_1000_J110_series?serial=CN23921MK105D2
Dec 23 18:14:14 ocky-desktop hp-systray: hp-systray(hpdio)[2034]: error: Device not found

How would I go about tearing down the /usr/sbin/cupsd profile ? (Assuming of course that is the cause).

I suppose I need to disable it but how do I add the teardown option ?

sudo ln -s /etc/apparmor.d/usr.sbin.cupsd /etc/apparmor.d/disable/
sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.cupsd

Any help most welcome.

[GreyGeek]

It looks like apparmor and cups are not working together, which is not uncommon.
My Trusty apparmor looks like this:

$ sudo apparmor_status
[sudo] password for jerry: 
apparmor module is loaded.
18 profiles are loaded.
18 profiles are in enforce mode.
   /sbin/dhclient
   /usr/bin/freshclam
   /usr/lib/NetworkManager/nm-dhcp-client.action
   /usr/lib/connman/scripts/dhclient-script
   /usr/lib/cups/backend/cups-pdf
   /usr/lib/lightdm/lightdm-guest-session
   /usr/lib/lightdm/lightdm-guest-session//chromium
   /usr/lib/telepathy/mission-control-5
   /usr/lib/telepathy/telepathy-*
   /usr/lib/telepathy/telepathy-*//pxgsettings
   /usr/lib/telepathy/telepathy-*//sanitized_helper
   /usr/lib/telepathy/telepathy-ofono
   /usr/sbin/cups-browsed
  [B] /usr/sbin/cupsd[/B]
   /usr/sbin/mysqld-akonadi
   /usr/sbin/mysqld-akonadi///usr/sbin/mysqld
   /usr/sbin/ntpd
   /usr/sbin/tcpdump
0 profiles are in complain mode.
8 processes have profiles defined.
8 processes are in enforce mode.
   /sbin/dhclient (2859) 
   /usr/bin/freshclam (1667) 
   /usr/lib/telepathy/mission-control-5 (3358) 
[B]   /usr/sbin/cups-browsed (1322) 
   /usr/sbin/cupsd (6519) 
   /usr/sbin/cupsd (6523) [/B]
   /usr/sbin/mysqld-akonadi///usr/sbin/mysqld (2868) 
   /usr/sbin/ntpd (2961) 
0 processes are in complain mode.
0 processes are unconfined but have a profile defined.
$

To disable apparmor's effect on cupsd run

 sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.cupsd
sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.cups-browsed

That will work until you reboot.
To disable cupsd and cups-browsed permenantly do

sudo ln -s /etc/apparmor.d/usr.sbin.cupsd /etc/apparmor.d/disable/
sudo ln -s /etc/apparmor.d/usr.sbin.cups-browsed /etc/apparmor.d/disable/
sudo /etc/init.d/apparmor restart

You can disable apparmor and unload the kernel module:

sudo /etc/init.d/apparmor stop

sudo update-rc.d -f apparmor remove

or

sudo service apparmor stop
sudo update-rc.d -f apparmor remove

or, remove apparmor

sudo apt-get remove apparmor apparmor-utils -y

[jook]

Weha

When you say not working, do you send a job to print and the computer and the printer do nothing? I have two laptops that will not print, but I have no issue with my desktop.
I am thinking of removing apparmor. Let us know how you made out.

[weha]

Permanently disabled the cups profiles:

sudo ln -s /etc/apparmor.d/usr.sbin.cupsd /etc/apparmor.d/disable/
sudo ln -s /etc/apparmor.d/usr.sbin.cups-browsed /etc/apparmor.d/disable/
sudo /etc/init.d/apparmor restart

Rebooted, but still the printer was initially not recognised. After an uninstall, then a reboot still nothing i.e. could not even setup the printer I had removed.
i then tried in Xubuntu 14.04 and had no problem (even with the same apparmor Denied message referred to before). However I must mention that printing
in Xubuntu does not always work, but usually comes right when I switch the usb port and restart it.

Now, after rebooting into Kubuntu the damn printer works. Once it is recognised and works, it will be fine for the day. Rebooted again and it is still
recognised. I hope that is a good omen

I will need to see how it goes for the next couple of days. (It seems to be a hit and miss unfathomable problem. Some suggest using the foomatic driver in preference to the
rather buggy hp driver).

Have a look .. http://www.dedoimedo.com/computers/l...-printing.html

Oh yes, Merry Christmas to all !