Public bug reported: My Epson printer disappeared from the list of registered printers.
I could not assign a suitable driver, even though a relevant package supplied by Epson was already installed (under /opt). It turned out that the logs contained messages like this one: audit: type=1400 audit(1602529987.370:8039): apparmor="DENIED" operation="open" profile="/usr/sbin/cupsd" name="/home/_opt/epson- inkjet-printer-stylus-photo-px810fw-series/ppds/" pid=29169 comm="cups- driverd" requested_mask="r" denied_mask="r" fsuid=7 ouid=0 As explained in https://wiki.ubuntu.com/DebuggingPrintingProblems#AppArmor_Protection_of_the_printing_system, a workaround is to install apparmor-utils and run `aa-complain cupsd'. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: cups 2.3.1-9ubuntu1.1 ProcVersionSignature: Ubuntu 5.4.0-7642.46~1598628707~20.04~040157c~dev-generic 5.4.44 Uname: Linux 5.4.0-7642-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.9 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Mon Oct 12 23:30:38 2020 InstallationDate: Installed on 2020-08-14 (59 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) Lpstat: device for Epson-Stylus-Photo-PX710W: dnssd://EPSONF904BC._printer._tcp.local/ MachineType: System76, Inc. Pangolin Performance Papersize: a4 PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/Epson-Stylus-Photo-PX710W.ppd'] failed with exit code 2: grep: /etc/cups/ppd/Epson-Stylus-Photo-PX710W.ppd: Permission denied ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-7642-generic root=UUID=675a1866-9c2b-49b9-a2c5-c131e736d65c ro quiet splash acpi_os_name=Linux acpi_osi= vt.handoff=7 SourcePackage: cups UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/25/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 4.6.5 dmi.board.asset.tag: Tag 12345 dmi.board.name: Pangolin Performance dmi.board.vendor: System76, Inc. dmi.board.version: panp9 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd06/25/2012:svnSystem76,Inc.:pnPangolinPerformance:pvrpanp9:rvnSystem76,Inc.:rnPangolinPerformance:rvrpanp9:cvnNoEnclosure:ct10:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: Pangolin Performance dmi.product.sku: Not Applicable dmi.product.version: panp9 dmi.sys.vendor: System76, Inc. ** Affects: cups (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apparmor apport-bug focal -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899538 Title: Cannnot use printer because of some apparmor access right To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1899538/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
