Comment 28 for bug 155530

This bug or something very similar has just bitten me out of the blue with a Hewlett-Packard LaserJet III on Gutsy.

Before today the printer was working fine with the foomatic (recommended) driver. About an hour ago I tried to print and it failed with the identical apparmor messages in the log: droitwix kernel: [stamp] audit(stamp): type=1502 operation="inode_permission" requested_mask="rw" denied_mask="rw" name="/dev/tty" pid=foo profile="/usr/sbin/cupsd"

Since I last tried to print - which was a few days ago - there has been an update including various CUPS packages, and a "PDF file generator" virtual printer has appeared out of nowhere :-) in the CUPS printers listing.

I deleted that and the HPLJ3, leaving me with no printers, restarted CUPS, and recreated the entry for the HPLJ3, but it made no difference.

Disabling apparmor with sudo aa-complain cups made no difference either, it still didn't work. Removing /etc/apparmor.d/usr.sbin.cupsd entirely and restarting apparmor got rid of the error messages in the log but I still couldn't print, now it just failed silently.

What did get it working was to reconfigure the printer to use the gutenprint driver instead of foomatic. Now it works fine with no error messages (and apparmor back to enforce mode), but it is a LOT slower (the box is a 450MHz PII with 320MB RAM and usually uses 200MB-300MB of swap, so perhaps more modern machinery would not notice, but in general ubuntu runs remarkably well despite the slowness of the box; with the foomatic driver, when that was working, printing was acceptably quick, but now that I have to use gutenprint it groans, and other applications become unresponsive for significant/annoying pauses while it prints).

cupsys on this box is now at 1.3.2-1ubuntu7.3 - is it possible that the update that fixes the above bug has broken something else?