I went into evince's printer settings, and found that under 'Page Setup', the 'Paper size' had been set to something named 'Letter small borders' or similar. So it looks like the severity of the bug could reasonably reduced since at some point in the past there WAS a user non- default configuration that triggered this error, and it's not reproducible by default on bionic if you're just using US Letter as your paper size. Nevertheless it still means that after upgrade, a gtk printer config that was valid ceases to be valid with no obvious explanation why.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1763520 Title: after upgrade to bionic, printing fails without explanation / logs / debuggability Status in cups-filters package in Ubuntu: Invalid Status in gtk+3.0 package in Ubuntu: New 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'] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups-filters/+bug/1763520/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp