Using ubuntu 20.10, cups 2.3.3-3ubuntu1, with a networked Samsung C480 printer (was automatically detected and set up on installation of the system).
Every other attempt to print fails with a varying message depending on the printing app (eg. on libreoffice write, "Cannot start printer"). Waiting a few minutes and retrying prints successfully.
Looking at cups.service journal messages while attempting to print, it looks like the second printing attempt crashes cupsd
cupsd[<pid>]: free(): invalid pointer
systemd[1]: cups.service: Main process exited, code=dumped, status=6/ABRT
systemd[1]: cups.service: Failed with result core-dump
The service then proceeds to restart after a few seconds, and trying to print again succeeds. Trying to print once more thereafter triggers the issue again.
Cuspd's error_log shows nothing happening around the crash (it does show some "org.freedesktop.ColorManager.AlreadyExists" error messages on restart, but I figured this would be normal, I can see the same message on other machines that have no printing issues).
This is a pretty standard (and recent) ubuntu install, with not much customized; in particular no apport custom config was made, and nothing was configured on cups side or ubuntu print settings, everything is set up as it was autodetected on install.
The same printer works flawlessly on a different computer using Arch and cups 2.3.3 as well (albeit without any ubuntu patches, obviously).
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ProblemType: Bug
ApportVersion: 2.20.11-0ubuntu50.5
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
DistroRelease: Ubuntu 20.10
InstallationDate: Installed on 2021-01-28 (12 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
KernLog:
Lpstat:
device for Samsung_C48x_Series_SEC842519933D78_: implicitclass://Samsung_C48x_Series_SEC842519933D78_/
MachineType: ASUSTeK COMPUTER INC. ZenBook UX434DA_UM433DA
Package: cups 2.3.3-3ubuntu1
PackageArchitecture: amd64
Papersize: a4
PpdFiles:
Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Samsung_C48x_Series_SEC842519933D78_.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Samsung_C48x_Series_SEC842519933D78_.ppd: Permission denied
ProcCmdline: BOOT_IMAGE=/vmlinuz-5.8.0-41-generic root=/dev/mapper/vgubuntu-root ro quiet splash resume=/dev/mapper/vgubuntu-root resume_offset=6731776
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=fr_FR.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.8.0-41-generic root=/dev/mapper/vgubuntu-root ro quiet splash resume=/dev/mapper/vgubuntu-root resume_offset=6731776
ProcVersionSignature: Ubuntu 5.8.0-41.46-generic 5.8.18
RebootRequiredPkgs: linux-image-5.8.0-43-generic linux-base
Tags: groovy
Uname: Linux 5.8.0-41-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True
dmi.bios.date: 09/05/2019
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: UX434DA_UM433DA.302
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: UX434DA
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.:bvrUX434DA_UM433DA.302:bd09/05/2019:br5.14:svnASUSTeKCOMPUTERINC.:pnZenBookUX434DA_UM433DA:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnUX434DA:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: ZenBook
dmi.product.name: ZenBook UX434DA_UM433DA
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
apport information