Print settings window reports "Print service is unavailable - Bad file descriptor" until cups is restarted

[Richard Riley Gress]

In the KDE Print Settings window, there are no settings (as expected) but a message reading "Print service is unavailable - Bad file descriptor":
http://wstaw.org/m/2014/11/17/plasma-desktopKB2526.png

When I restart the cups service, all is well and I can see print settings.

Kubuntu 14.10

$ apt-cache policy cups
cups:
  Installed: 1.7.5-3ubuntu2
  Candidate: 1.7.5-3ubuntu2
  Version table:
 *** 1.7.5-3ubuntu2 0
        500 http://mirror.cc.columbia.edu/pub/linux/ubuntu/archive/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status
---
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: KDE
DistroRelease: Ubuntu 14.10
InstallationDate: Installed on 2014-04-18 (216 days ago)
InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
Lpstat: device for Dell-C1760nw: dnssd://Dell%20C1760nw%20Color%20Printer%20(B7%3A5F%3A1D)._pdl-datastream._tcp.local/
MachineType: To be filled by O.E.M. To be filled by O.E.M.
NonfreeKernelModules: fglrx
Package: cups 1.7.5-3ubuntu2
PackageArchitecture: amd64
Papersize: letter
PpdFiles: Dell-C1760nw: Xerox Phaser 6000B v1.0
ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=b4a856d9-5d57-455a-b81d-6f21fc094155 ro quiet splash vt.handoff=7
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=b4a856d9-5d57-455a-b81d-6f21fc094155 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Tags: utopic
Uname: Linux 3.16.0-24-generic x86_64
UpgradeStatus: Upgraded to utopic on 2014-10-26 (24 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
_MarkForUpload: True
dmi.bios.date: 12/10/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2201
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A97 R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2201:bd12/10/2013:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A97R2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

apport information

[Richard Riley Gress (searchfgold67899)]

Apport-collected while bug not present. Reproducible occasionally.

[Pascal De Vuyst (pascal-devuyst)]

Does the cups webinterface http://localhost:631/ work if you have the problem?

[Richard Riley Gress (searchfgold67899)]

http://localhost:631/ gives a 404 error if the problem is present.

[Ronnie Tucker (ronnietucker)]

Some for me. Http://localhost:631/ gives me 'This web page is not available' in Chrome 38.0.2125.122 (64-bit) in Kubuntu 14.10.

[Stefan Carslöv (odur)]

A dirty workaround:
Put "service cups restart" in /etc/rc.local

[Pascal De Vuyst (pascal-devuyst)]

Is the cups service running (before restart) when you have the problem, on a terminal run:
sudo service cups status
to find out
If so check please attach /var/log/boot.log

[Ronnie Tucker (ronnietucker)]

ronnie@ronnie-desktop:~$ sudo service cups status
[sudo] password for ronnie:
cups start/running

boot.log attached.

[Richard Riley Gress (searchfgold67899)]

When bug is present, cups is running:

$ sudo service cups status
cups start/running

Attaching /var/log/boot.log

[Pascal De Vuyst (pascal-devuyst)]

Please provide a cups error_log with debugging enabled as described here before and after restarting cups: https://wiki.ubuntu.com/DebuggingPrintingProblems#CUPS_error_log

[Launchpad Janitor (janitor)]

[Expired for cups (Ubuntu) because there has been no activity for 60 days.]

[Mondane (mondane-woodworker)]

After I upgraded Ubuntu 14.10 to 15.04, the bug disappeared.

[John Wiedenhoeft (c-jo4n-5)]

Encountered this bug in Ubuntu 16.04.3 LTS. CUPS server is running, but System settings shows "Print service unavailable. Bad file descriptor". Restarting CUPS does not help.