First, 21.04 isn't released yet, so you shouldn't be using it unless you're prepared for bugs.
Second, it would be better to ask for general debugging help at https://askubuntu.com/ since this is for reporting bugs. There's no information in your attached dmesg that might help, though that is probably because it's from the boot after your hang, so it doesn't include anything useful. If you have any details about any actual bug please attach it. ** Changed in: systemd (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1925215 Title: System completely freezes and requires reboot Status in systemd package in Ubuntu: Incomplete Bug description: The OS spontaneously froze whilst doing some work (firefox, VMs). I can't find anything suspect in the logs at this stage. I will keep an eye out for this issue but would like advise on what to check for, any tools I should install and commands to run when it crashes again. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: systemd 247.3-3ubuntu3 ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12 Uname: Linux 5.11.0-16-generic x86_64 ApportVersion: 2.20.11-0ubuntu65 Architecture: amd64 CasperMD5CheckResult: pass Date: Tue Apr 20 14:28:46 2021 ExecutablePath: /usr/lib/systemd/systemd InstallationDate: Installed on 2021-04-16 (3 days ago) InstallationMedia: Ubuntu 21.04 "Hirsute Hippo" - Beta amd64 (20210331.1) MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. ProcEnviron: TERM=linux PATH=(custom, no user) ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-16-generic root=UUID=739968f7-1aa4-47f1-8d68-55af0ffb428d ro quiet splash vt.handoff=7 SourcePackage: systemd SystemdDelta: [EXTENDED] /usr/lib/systemd/system/rc-local.service → /usr/lib/systemd/system/rc-local.service.d/debian.conf [EXTENDED] /usr/lib/systemd/system/systemd-localed.service → /usr/lib/systemd/system/systemd-localed.service.d/locale-gen.conf [EXTENDED] /usr/lib/systemd/system/user@.service → /usr/lib/systemd/system/user@.service.d/timeout.conf 3 overridden configuration files found. SystemdFailedUnits: Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?). Unit \xe2\x97\x8f.service could not be found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/11/2013 dmi.bios.release: 4.6 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P2.30 dmi.board.name: Z77 OC Formula 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.:bvrP2.30:bd07/11/2013:br4.6:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnZ77OCFormula: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.sku: 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/systemd/+bug/1925215/+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
