@sokolov--I also have a Dell printer & I think I have fixed the problem by adding that AllowExpiredCerts option that @Nyyr mentioned, via the GUI settings dialog. As I recall the steps were:
settings -> printers -> Additional Printer settings right-click on affected printer (for me Dell_Color_MFP_E525w etc.) -> properties click 'job options' category on left scroll all the way to the bottom, where it says "To add a new option, enter its name in the box below and click to add." Type `AllowExpiredCerts` (without the back-ticks) and click 'Add' enter the value 'true' for this new option. After doing that, I could print a test page. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1886653 Title: cups-pki-expired Status in cups package in Ubuntu: Confirmed Bug description: The printer always goes to stopped state in Ubuntu 20.04. Print properties window has status message saying: "cups-pki-expired". I have HP color laserjet m552, which Ubuntu discovers directly from the local network and configures automatically. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: cups 2.3.1-9ubuntu1.1 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 Uname: Linux 5.4.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Tue Jul 7 14:40:00 2020 InstallationDate: Installed on 2019-11-03 (247 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) Lpstat: device for HP_Color_LaserJet_M552_5F80BF_: implicitclass://HP_Color_LaserJet_M552_5F80BF_/ MachineType: LENOVO 81H1 Papersize: a4 PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/HP_Color_LaserJet_M552_5F80BF_.ppd'] failed with exit code 2: grep: /etc/cups/ppd/HP_Color_LaserJet_M552_5F80BF_.ppd: Permission denied ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-40-generic root=UUID=7f92666a-65f8-485e-b998-046c2c596aa5 ro rootflags=subvol=@ quiet splash vt.handoff=7 SourcePackage: cups UpgradeStatus: Upgraded to focal on 2020-03-28 (100 days ago) dmi.bios.date: 08/17/2018 dmi.bios.vendor: LENOVO dmi.bios.version: 8PCN45WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40700 WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo ideapad 530S-14ARR dmi.modalias: dmi:bvnLENOVO:bvr8PCN45WW:bd08/17/2018:svnLENOVO:pn81H1:pvrLenovoideapad530S-14ARR:rvnLENOVO:rnLNVNB161216:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrLenovoideapad530S-14ARR: dmi.product.family: ideapad 530S-14ARR dmi.product.name: 81H1 dmi.product.sku: LENOVO_MT_81H1_BU_idea_FM_ideapad 530S-14ARR dmi.product.version: Lenovo ideapad 530S-14ARR dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1886653/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp