I have similar problems. See: https://answers.launchpad.net/hplip/+question/692399
Running the latest version of Kubuntu and just tried to install brand new HP think tank 551 MFP. Does involve similar warnings from print doctor saying it cannot access some files. | PERMISSION | -------------- USB Smart_Tank_Plus_550 Required - - OK Node:'/dev/bus/usb/003/002' Perm:' root lp rw- rw- rw- rw- r--' Checking Permissions.... Checking for Configured Queues.... warning: Fail to read ppd=/etc/cups/ppd/Smart_Tank_Plus_550.ppd file warning: Insufficient permission to access file /etc/cups/ppd/Smart_Tank_Plus_550.ppd warning: Could not complete Queue(s) configuration check Checking for HP Properitery Plugin's.... No plug-in printers are configured. Diagnose completed... " Is this entire issue due to a problem with folder permissions preventing an application or driver from accessing needed folders or files? Please respond. Kindest regards; Scorch. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to hplip in Ubuntu. https://bugs.launchpad.net/bugs/1879206 Title: cups hplip not install printer Status in cups package in Ubuntu: Incomplete Status in hplip package in Ubuntu: Incomplete Bug description: After upgrading to Ubuntu 20.04 I can't print anymore. Description: Ubuntu 20.04 LTS Release: 20.04 cups: Installato: 2.3.1-9ubuntu1.1 Candidato: 2.3.1-9ubuntu1.1 Tabella versione: *** 2.3.1-9ubuntu1.1 500 500 http://it.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 2.3.1-9ubuntu1 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages hplip: Installato: 3.20.3+dfsg0-2 Candidato: 3.20.3+dfsg0-2 Tabella versione: *** 3.20.3+dfsg0-2 500 500 http://it.archive.ubuntu.com/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status I tried to reinstall the printer, but it is not being re-saved by cups / hplip ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: cups 2.3.1-9ubuntu1.1 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 Uname: Linux 5.4.0-29-generic x86_64 ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Mon May 18 02:24:07 2020 InstallationDate: Installed on 2020-05-17 (0 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) Lpstat: device for DeskJet_3630: hp:/usb/DeskJet_3630_series?serial=CN8AM7H3230658 MachineType: LENOVO 80G0 Papersize: a4 PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/DeskJet_3630.ppd'] failed with exit code 2: grep: /etc/cups/ppd/DeskJet_3630.ppd: Permission denied ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-29-generic root=UUID=6a8469e0-ecea-4a86-8040-b0caaa938fe4 ro quiet splash vt.handoff=7 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/18/2014 dmi.bios.vendor: LENOVO dmi.bios.version: A7CN40WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: Lancer 5A6 dmi.board.vendor: LENOVO dmi.board.version: SDK0F82993WIN dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo G50-30 dmi.modalias: dmi:bvnLENOVO:bvrA7CN40WW:bd07/18/2014:svnLENOVO:pn80G0:pvrLenovoG50-30:rvnLENOVO:rnLancer5A6:rvrSDK0F82993WIN:cvnLENOVO:ct10:cvrLenovoG50-30: dmi.product.family: IDEAPAD dmi.product.name: 80G0 dmi.product.sku: LENOVO_MT_80G0_BU_idea_FM_Lenovo G50-30 dmi.product.version: Lenovo G50-30 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1879206/+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