The issue started after upgrading from 17.10 to 18.04. However, at the same time I also upgraded the CPU from an AMD A12-9800 to the AMD Ryzen 7 2700 (with the rest of the system remaining unchanged). I don't have the older CPU anymore, so I cannot change back for test purposes. Given the documented occurrences produced exactly the same call trace I don't expect this to be an intermittent CPU problem (e.g., causes by a CPU errata).
I can certainly try an upstream kernel. Sadly the issue occurs only on rare occasions, so it may take quite a while to be reasonably sure things are okay. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1779063 Title: Occasional kernel panic on shutdown in ext4 code (dquot_drop) Status in linux package in Ubuntu: Incomplete Bug description: Occasionally (about once every three weeks) my machine experiences a kernel panic somewhere in the ext4 code on shutdown (and only on shutdown). Ubuntu Version: 18.04, x86-64 Platform: AMD Ryzen R7 2700 on an Asrock AB350M-Pro4 mainboard. I attached two photos of the panic messages, one occurring on May 16th, the other on June 26th. The call trace is identical in both. Given how similar the messages are, I don't think this is an intermittent machine-related glitch. As of yet, however, I could not identify a pattern on when the issue occurs. Kernel versions: - May 16th: 4.15.0-20-generic - June 26th: 4.15.0-23-generic --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: maik 1743 F.... pulseaudio /dev/snd/controlC1: maik 1743 F.... pulseaudio /dev/snd/controlC0: maik 1743 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=a4be9bd2-a879-438d-be59-41d095ad18fb InstallationDate: Installed on 2017-08-25 (306 days ago) InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-23-generic root=UUID=20c38f5a-e4d2-4cee-9daa-84a848f15452 ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-23-generic N/A linux-backports-modules-4.15.0-23-generic N/A linux-firmware 1.173.1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: bionic Uname: Linux 4.15.0-23-generic x86_64 UpgradeStatus: Upgraded to bionic on 2018-04-26 (62 days ago) UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 05/08/2018 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: L4.82 dmi.board.name: AB350M Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrL4.82:bd05/08/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAB350MPro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1779063/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp