cups daemon randomly fails to start on system boot, manually typing sudo service cups restart helps. This tends to freeze Eclipse in function which enumerates printers; also the Ubuntu System Settings / Printers dialog reports that it cannot connect to the cups service.
I have tried to look into /var/log/cups/ but there is nothing important: error_log is empty, error_log.1 contains old logs from 2014;
access_log contains current log messages, but no errors:
$ cat access_log
localhost - - [05/Feb/2015:10:36:49 +0100] "POST / HTTP/1.1" 200 276 Create-Printer-Subscriptions successful-ok
localhost - - [05/Feb/2015:10:37:17 +0100] "POST / HTTP/1.1" 200 155 Cancel-Subscription successful-ok
localhost - - [05/Feb/2015:10:42:03 +0100] "POST / HTTP/1.1" 200 276 Create-Printer-Subscriptions successful-ok
localhost - - [05/Feb/2015:10:42:12 +0100] "POST / HTTP/1.1" 200 155 Cancel-Subscription successful-ok
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: cups 1.7.5-3ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CupsErrorLog:
CurrentDesktop: Unity
Date: Thu Feb 5 10:39:44 2015
InstallationDate: Installed on 2013-10-14 (478 days ago)
InstallationMedia: Ubuntu-Server 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
Lpstat: device for Hewlett-Packard-HP-LaserJet-4100-Series: hp:/net/HP_LaserJet_4100_Series?ip=10.240.100.119
MachineType: System manufacturer System Product Name
Papersize: a4
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Hewlett-Packard-HP-LaserJet-4100-Series.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Hewlett-Packard-HP-LaserJet-4100-Series.ppd: Permission denied
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-30-generic root=/dev/mapper/vg--rei-lv--root ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
SourcePackage: cups
UpgradeStatus: Upgraded to utopic on 2014-10-17 (110 days ago)
dmi.bios.date: 08/14/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2204
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: P8Z77-V LX
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2204:bd08/14/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-VLX:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
Status changed to 'Confirmed' because the bug affects multiple users.