Ubuntu
cups package

printers no longer found after re-connecting network

Bug #965124 reported by Adrian Bunk
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
cups (Ubuntu)
Fix Released
Undecided
Unassigned

Bug Description

I am moving a laptop between different places with wired connections to the same network and ran into an annoying regression in precise, that is even reproducible when re-connecting at the same place.

Test case:
- plug out network cable
- wait 2 minutes
- plug network cable back in
- wait a few minutes

Expected result:
printers are visible in applications

Actual result:
printers are not visible in applications

/var/log/cups/error_log contains a funny error message:
CUPS-Get-Printers failed: Success

I found https://bugzilla.redhat.com/show_bug.cgi?id=799595 and the patch from there (attached, already applied upstream as revision 10321) fixes the problem for me.

Revision history for this message
Adrian Bunk (bunk) wrote :
Revision history for this message
Adrian Bunk (bunk) wrote :

Two things I forgot to mention:

The problem occurs when the local computer pulls the list of printers from a remote CUPS server, when the printers are configured at the local CUPS there is likely no problem.

Workaround (without the patch):
service cups restart

Revision history for this message
Till Kamppeter (till-kamppeter) wrote :

Committed patch to Debian's BZR repository of CUPS. It will be applied to the next CUPS package in Ubuntu Precise.

Changed in cups (Ubuntu):
status: New → Fix Committed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package cups - 1.5.2-9

---------------
cups (1.5.2-9) unstable; urgency=low

  [ Till Kamppeter ]
  * debian/control: In the Recommends: section of the "cups" binary package
    replaced "cups-driver-gutenprint" by "printer-driver-gutenprint" to
    reflect the new name (LP: #966217).
  * debian/patches/cups-polld-reconnect.patch: The CUPS polling daemon did not
    reinitialize its connection to the remote server on errors in all cases
    (LP: #965124, CUPS STR #4031, Red Hat bug #799595).
  * debian/patches/commandtops-make-robust-against-broken-postscript.patch:
    Updated patch to the upstream state of commandtops.
  * debian/patches/ppd-cache-fix-crash.patch: Added NULL check to fix crash
    of cupsd on corrupted data in /var/cache/cups/ (LP: #957023, CUPS STR
    #4049).
  * debian/patches/cups-avahi.patch: Refreshed with quilt.

  [ Martin Pitt ]
  * debian/cups.postinst: Don't fall over if /etc/apparmor.d/local exists and
    is not a directory. (LP: #962226)
 -- Martin Pitt <email address hidden> Fri, 30 Mar 2012 08:44:35 +0200

Changed in cups (Ubuntu):
status: Fix Committed → Fix Released
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