Ubuntu
cups package

CUPS web interface authentication fails in Raring

Bug #1157766 reported by Fiorenzo De Santis on 2013-03-20

This bug report is a duplicate of: Bug #1157318: Login error in CUPS when adding a printer (or other admin procedure). Edit Remove

32

This bug affects 6 people

Affects		Status	Importance	Assigned to	Milestone
	cups (Ubuntu)	Incomplete	Undecided	Martin Pitt

Bug Description

When I try to modify a printer in http://localhost:631/printers I am prompted to authenticate as usual, but my username and my password do not work.

I have already checked that my user belongs to the lpadmin group.

However I can use system-config-printer.

I have attached the cups error_log in debug mode (LogLevel debug).

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: cups 1.6.2-1
ProcVersionSignature: Ubuntu 3.8.0-13.23-generic 3.8.3
Uname: Linux 3.8.0-13-generic x86_64
ApportVersion: 2.9.2-0ubuntu1
Architecture: amd64
Date: Wed Mar 20 15:46:42 2013
InstallationDate: Installed on 2013-03-16 (4 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130315)
MachineType: ASUSTeK Computer Inc. U36SD
MarkForUpload: True
Papersize: a4
PpdFiles:
HL2270DW: Generic PCL Laser Printer
MFCJ6510DW: Brother MFC-J6510DW CUPS
BRFAX: Brother BRMFCFAX for CUPS
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-13-generic root=UUID=ec9aa77a-fa22-4668-b846-38058c29cf00 ro quiet splash vt.handoff=7
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/12/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U36SD.205
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U36SD
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU36SD.205:bd07/12/2011:svnASUSTeKComputerInc.:pnU36SD:pvr1.0:rvnASUSTeKComputerInc.:rnU36SD:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: U36SD
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.

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Revision history for this message

Fiorenzo De Santis (fiod3s) wrote on 2013-03-20:

#1

error_log Edit (219.0 KiB, text/plain)
BootDmesg.txt Edit (62.0 KiB, text/plain; charset="utf-8")
CupsErrorLog.txt Edit (214.7 KiB, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (5.6 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (6.6 KiB, text/plain; charset="utf-8")
KernLog.txt Edit (33.1 KiB, text/plain; charset="utf-8")
Locale.txt Edit (311 bytes, text/plain; charset="utf-8")
Lpstat.txt Edit (535 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (12.1 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (530 bytes, text/plain; charset="utf-8")
PrintingPackages.txt Edit (1.1 KiB, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (3.6 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (313 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (2.7 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (3.7 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (142.1 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (344.4 KiB, text/plain; charset="utf-8")

Revision history for this message

Launchpad Janitor (janitor) wrote on 2013-03-20:

#2

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

Changed in cups (Ubuntu):
status:	New → Confirmed

Revision history for this message

jhoechtl (johann-hoechtl) wrote on 2013-03-20:

#3

Same on Kubuntu 13.04 latest updates. Works with the GUI tools but not with the web interface. User to add a printer is in group lp and lpadmin.

Revision history for this message

quiricada (raraland) wrote on 2013-04-11:

#4

same problem.

Linux 3.8.0-17-generic #27-Ubuntu SMP Sun Apr 7 19:40:26 UTC 2013 i686 i686 i686 GNU/Linux
cups 1.6.2

Revision history for this message

Till Kamppeter (till-kamppeter) wrote on 2013-04-11:

#5

Please follow the instructions of the section "AppArmor Protection of the printing system" on https://wiki.ubuntu.com/DebuggingPrintingProblems

Changed in cups (Ubuntu):
status:	Confirmed → Incomplete

Revision history for this message

Fiorenzo De Santis (fiod3s) wrote on 2013-04-11:

#6

I've just installed apparmor-utils and I executed

sudo aa-complain cupsd

so now I'm able to login with cups web interface again, however this is only a workaround

Revision history for this message

Till Kamppeter (till-kamppeter) wrote on 2013-04-11:

#7

pitti, this seems to be an AppArmor problem, can you look into this? Thanks.

Changed in cups (Ubuntu):
assignee:	nobody → Martin Pitt (pitti)

Revision history for this message

Till Kamppeter (till-kamppeter) wrote on 2013-04-11:

#8

Everyone who has this problem, can you run

sudo aa-complain cupsd

if you have not yet done so and then do the stuff you wanted to do in the web interface?

Please tell whether the web interface works for you now and, independent whether it actually works, attach /var/log/syslog to this bug report. Thanks.

Revision history for this message

Fiorenzo De Santis (fiod3s) wrote on 2013-04-11:

#9

syslog Edit (296.9 KiB, text/plain)

my syslog

Revision history for this message

PappaTobbe (pappatobbe-deactivatedaccount) wrote on 2013-04-11:

#10

syslog Edit (30.3 KiB, text/plain)

after aa-complain cupsd all seems to work dandy
i'm om ubuntu server 13.04 (headless so i have only tried the webinterface)

Revision history for this message

Martin Pitt (pitti) wrote on 2013-04-12:

#11

Till, we have Apport :-) The CurrentDmesg.txt attachment already tells you the AppArmor violations:

33.954398] type=1400 audit(1363785942.896:28): apparmor="DENIED" operation="capable" parent=1 profile="/usr/sbin/cupsd" pid=971 comm="cupsd" pid=971 comm="cupsd" capability=29 capname="audit_write"

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