@till-kamppeter, I'm not certain what you mean by the "upstream source." The printer auto-installed when I installed Ubuntu 20.04 shortly after its release.
After your post, I did: # apt purge cups cups-client cups-bsd # apt purge hplip hpijs printer-driver-gutenprint # apt autoremove # reboot # apt install cups cups-client cups-bsd # apt install printer-driver-gutenprint printer-driver-hpcups printer-driver-hpijs printer-driver-postscript-hp # reboot # journalctl -b 0 and got >2000 consecutive entries reading: AVC apparmor="DENIED" operation="create" profile="snap.hplip-printer- app.hplip-printer-app-server" pid=2211 comm="hplip-printer-a" family="inet" sock_type="stream" protocol=0 requested_mask="create" denied_mask="create" AppArmor is not expressly configured (meaning no one here manually configured it) on this system. I'd guess this is what's at work but don't know. Please advise. Otherwise, regarding snap, I don't code around others' steaming piles. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to cups in Ubuntu. https://bugs.launchpad.net/bugs/1960601 Title: Ubuntu 20.04 stopped detecting HP LaserJet P2055dn after this morning's update Status in cups package in Ubuntu: New Bug description: I printed yesterday. I updated Ubuntu 20.04.3 this morning. The system now does not detect the HP LaserJet P2055dn to which it has been connected for years. The output of the command "apt-cache policy cups" is: cups: Installed: 2.3.1-9ubuntu1.1 Candidate: 2.3.1-9ubuntu1.1 Version table: *** 2.3.1-9ubuntu1.1 500 500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 http://archive.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 2.3.1-9ubuntu1 500 500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages What I expected to happen was to print a document. Then, for the system to recognize the printer when I tried to reinstall it. What happened instead was that printing failed. Settings > Printers > Additional Printer Settings vomited an error message saying that the printer may not be connected. The print job hung on "Processing" for 5-10 minutes before I terminated it. I deleted the printer on the system and the system would / could not detect the device. No obvious means exists to install a printer driver for a specified printer, which is an astonishing design failure for the platform. I have rebooted the system and the printer multiple times throughout this process. I also attempted to update the system but no updates are available. All the wiring and power is as before. The system recognizes any number of other USB devices connected to it, including scanners, etc., that are freshly powered on. Power cycling the HP printer has no effect on lsusb output. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: cups 2.3.1-9ubuntu1.1 ProcVersionSignature: Ubuntu 5.4.0-99.112-generic 5.4.162 Uname: Linux 5.4.0-99-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: pass CupsErrorLog: E [11/Feb/2022:00:00:13 -0800] Unable to open listen socket for address [v1.::1]:631 - Address family not supported by protocol. E [11/Feb/2022:00:10:42 -0800] [Client 27] Returning HTTP Forbidden for CUPS-Add-Modify-Printer (ipp://localhost/printers/HP-LaserJet-P2055dn) from localhost E [11/Feb/2022:00:17:48 -0800] [Client 1329757] Returning IPP client-error-document-format-not-supported for Print-Job (ipp://localhost:631/printers/CUPS-BRF-Printer) from localhost. CurrentDesktop: ubuntu:GNOME CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted Date: Fri Feb 11 00:44:52 2022 InstallationDate: Installed on 2020-08-20 (539 days ago) InstallationMedia: Ubuntu-Server 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) KernLog: Lpstat: device for CUPS-BRF-Printer: cups-brf:/ MachineType: System manufacturer System Product Name Papersize: letter PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/CUPS-BRF-Printer.ppd'] failed with exit code 2: grep: /etc/cups/ppd/CUPS-BRF-Printer.ppd: Permission denied ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-99-generic root=UUID=94757e46-a814-4c27-b3a5-4ff139bd211d ro ipv6.disable=1 nomodeset ipv6.disable=1 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/19/2014 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1602 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: P9X79-E WS dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1602:bd02/19/2014:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP9X79-EWS:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.family: To be filled by O.E.M. dmi.product.name: System Product Name dmi.product.sku: SKU dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1960601/+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
