Public bug reported:

Printers are found, right after installing them, later the same printer
is not found anymore.

Printer ip did not change in between
Printer ip is solvable from command line
Printer ip is responsive from command line
Printer ip does what is expected if accessed from command line

CUPS just tells "Printer not found" or "Printer does not respond" or "Printer 
not available".
Reconfiguring the printer makes this printer work again until it stops being 
found again after some time.

ProblemType: Bug
DistroRelease: Ubuntu 26.10
Package: cups 2.4.16-1ubuntu3
ProcVersionSignature: Ubuntu 7.3.0-10.10-generic 7.3.0
Uname: Linux 7.3.0-10-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.36.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Wed Nov  4 21:07:57 2026
InstallationDate: Installed on 2021-12-11 (1789 days ago)
InstallationMedia: Xubuntu 21.10 "Impish Indri" - Release amd64 (20211012)
Lpstat: device for Kyocera_ECOSYS_MA2600cfx: 
implicitclass://Kyocera_ECOSYS_MA2600cfx/
MachineType: LENOVO 20FAS16K00
Papersize: a4
PpdFiles: Error: command ['fgrep', '-H', '*NickName', 
'/etc/cups/ppd/Kyocera_ECOSYS_MA2600cfx.ppd'] failed with exit code 2: grep: 
/etc/cups/ppd/Kyocera_ECOSYS_MA2600cfx.ppd: Permission denied
ProcEnviron:
 LANG=de_DE.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
ProcKernelCmdLine: BOOT_IMAGE=/BOOT/ubuntu_vwfg3u@/vmlinuz-7.3.0-10-generic 
root=ZFS=rpool/ROOT/ubuntu_vwfg3u ro splash vt.handoff=1
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/08/2021
dmi.bios.release: 1.52
dmi.bios.vendor: LENOVO
dmi.bios.version: N1CET84W (1.52 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FAS16K00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.14
dmi.modalias: 
dmi:bvnLENOVO:bvrN1CET84W(1.52):bd07/08/2021:br1.52:efr1.14:svnLENOVO:pn20FAS16K00:pvrThinkPadT460s:rvnLENOVO:rn20FAS16K00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20FA_BU_Think_FM_ThinkPadT460s:pfaThinkPadT460s:
dmi.product.family: ThinkPad T460s
dmi.product.name: 20FAS16K00
dmi.product.sku: LENOVO_MT_20FA_BU_Think_FM_ThinkPad T460s
dmi.product.version: ThinkPad T460s
dmi.sys.vendor: LENOVO

** Affects: cups (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug stonking third-party-packages

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https://bugs.launchpad.net/bugs/2173014

Title:
  cups does not find configured networked printers

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