[Bug 1763520] Re: after upgrade to bionic, printing fails without explanation / logs / debuggability

[Mathew Hodson]

** No longer affects: cups-filters (Ubuntu)

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Title:
  after upgrade to bionic, printing fails without explanation / logs /
  debuggability

Status in gtk+3.0 package in Ubuntu:
  In Progress
Status in gtk+3.0 source package in Bionic:
  In Progress
Status in gtk+3.0 source package in Cosmic:
  In Progress

Bug description:
  [Impact]

  The problem occurs when the printer's driver package is updated and
  with this the PPD is replaced and one of the default settings of the
  queue is not available any more in the new PPD file. Then the setting
  is prefixed with "Custom." and with this the jobs fail.

  See comment #15 for more info.

  [Test Case]

  - Create a print queue with a PPD.
  - evince an arbitrary PDF file
  - Click the print icon
  - In the print dialog choose the newly created queue and choose some uncommon paper size (not custom). Click "Print".
  - Check /var/log/cups/error_log, the page size gets correctly received.
  - Close evince.
  - Stop CUPS, edit the PPD file removing the paper size you have selected for your job in the PageSize, PageRegion, PaperDimension, and ImageableArea lines.
  - Start CUPS.
  - Open the same PDF file again with evince, click Print and then select "Print" in the print dialog without changing anything.
  - The job fails, in /var/log/cups/error_log you see that the page size is prefixed with "Custom.".

  With the fixed package installed the job will print.

  [Regression Potential]

  The change applies only to saved settings of the print dialog not
  matching with any of the settings available in the PPD file. In rare
  cases the fix could fail by mis-understanding the setting and this way
  not being effective. For options which do not support setting custom
  values (the vast majority) the patch should always prevent a job
  failure though.

  [Other Info]

  Complete info about the bug and the fix in comment #15,

  Original bug description:

  I am unable to print to my network-attached printer after upgrade to
  bionic.  ps shows:

  lp       26047  0.0  0.0  91668  5756 ?        S    15:06   0:00  \_ HP-ENVY-4500-new 473 vorlon USCIS Form I-9 1 print-content-optimize=auto print-rendering-intent=auto cupsPrintQuality=4 number-up=1 MediaType=Stationery noCollate print-scaling=auto PageSize=Custom.Letter.SM ColorModel=RGB Duplex=DuplexNoTumble job-uuid=urn:uuid:08c937ec-ccb6-3ff1-6ed4-212128e4257b job-originating-host-name=localhost date-time-at-creation= date-time-at-processing= time-at-creation=1523570792 time-at-processing=1523570792 print-quality=4
  lp       26050  0.1  0.0      0     0 ?        Z    15:06   0:00  |   \_ [gs] <defunct>
  lp       26048  0.0  0.0  79908  3836 ?        S    15:06   0:00  \_ HP-ENVY-4500-new 473 vorlon USCIS Form I-9 1 print-content-optimize=auto print-rendering-intent=auto cupsPrintQuality=4 number-up=1 MediaType=Stationery noCollate print-scaling=auto PageSize=Custom.Letter.SM ColorModel=RGB Duplex=DuplexNoTumble job-uuid=urn:uuid:08c937ec-ccb6-3ff1-6ed4-212128e4257b job-originating-host-name=localhost date-time-at-creation= date-time-at-processing= time-at-creation=1523570792 time-at-processing=1523570792 print-quality=4
  root     26049  0.0  0.0  84388  6192 ?        S    15:06   0:00  \_ ipp://HP645106EA160E.local:631/ipp/print 473 vorlon USCIS Form I-9 1 print-content-optimize=auto print-rendering-intent=auto cupsPrintQuality=4 number-up=1 MediaType=Stationery noCollate print-scaling=auto PageSize=Custom.Letter.SM ColorModel=RGB Duplex=DuplexNoTumble job-uuid=urn:uuid:08c937ec-ccb6-3ff1-6ed4-212128e4257b job-originating-host-name=localhost date-time-at-creation= date-time-at-processing= time-at-creation=1523570792 time-at-processing=1523570792 print-quality=4

  Note the un-reaped gs process.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: cups 2.2.7-1ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10
  Uname: Linux 4.15.0-13-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu4
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Apr 12 15:07:49 2018
  InstallationDate: Installed on 2010-09-24 (2757 days ago)
  InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
  MachineType: LENOVO 2306CTO
  Papersize: letter
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-13-generic.efi.signed root=/dev/mapper/hostname-root ro quiet splash vt.handoff=1
  SourcePackage: cups
  UpgradeStatus: Upgraded to bionic on 2018-03-21 (21 days ago)
  dmi.bios.date: 10/25/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G2ET97WW (2.57 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2306CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG2ET97WW(2.57):bd10/25/2013:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.family: ThinkPad X230
  dmi.product.name: 2306CTO
  dmi.product.version: ThinkPad X230
  dmi.sys.vendor: LENOVO
  modified.conffile..etc.cups.cupsd.conf: [inaccessible: [Errno 13] Permission denied: '/etc/cups/cupsd.conf']

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