I think I have found the cause, although it seems a little odd. Yesterday the system ended up in the "powered down" state shortly after boot. I may have booted the wrong kernel. Anyway I rebooted to the 6.8.0-48-generic kernel and all was OK. Until my daily backup reported that it couldn't find the backup partition. Which was odd, as it is on the internal SSD (the NUC has an M2 NVMe and an SDD).
So I shut down and removed the SSD to check it on another system in a USB caddy (it was fine) then put it back into the NUC. Now it was found again. Presumably there had been a dodgy connexion (the ribbon cable connexion to the motherboard?). So I wondered whether this had been the problem all along and tried booting 6.11.0-13-generic. This now seemed to be OK. It's still OK today. I'm using it now. So I'll close this. An odd bug though to have only affected 6.9+ kernels, when 6.8, and MS Windows was OK. (And btrfs scrub *before* I reset the connexion consistently ran at 445MiB/s). ** Changed in: linux (Ubuntu) Status: New => Invalid -- 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/2087333 Title: kernel 6.11.0-9-generic stops on Intel i3-1315U NUC Status in linux package in Ubuntu: Invalid Bug description: I've just upgrade to Kubuntu 24.10 on 6 systems. The last of these is a Intel NUC with a "13th Gen Intel(R) Core(TM) i3-1315U" processor. This system does not stay up very long with the 6.11.0-9-generic kernel. After a minute or so the system stops, the display goes blank and the power button on the system goes out. I have to recycle the power on the wall socket to get things back to life. If I boot into the 6.8.0-48-generic (from 24.04) the system runs OK. Similarly, the other 5 system I have installed 24.10 on: NUC with i3-1115G4 processor NUC with i3-10110U processor NUC with i3-8109U processor laptop with Ultra 5 125H processor laptop with i5-10210U processor are all OK running 6.11.0-9-generic NOTE: that any kernel details in the attached report are for the 6.8.0-48-generic kernel, noit the failing one!!! ProblemType: Bug DistroRelease: Ubuntu 24.10 Package: linux-image-6.11.0-9-generic 6.11.0-9.9 ProcVersionSignature: Ubuntu 6.8.0-48.48-generic 6.8.12 Uname: Linux 6.8.0-48-generic x86_64 ApportVersion: 2.30.0-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: gml4410 2488 F.... pipewire /dev/snd/controlC0: gml4410 2490 F.... wireplumber CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Thu Nov 7 22:59:23 2024 InstallationDate: Installed on 2024-05-15 (176 days ago) InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240425.1) IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig' MachineType: Intel(R) Client Systems NUC13ANHi3 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-48-generic root=UUID=1dc99963-d570-44ff-a00b-09df908f9dd2 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.8.0-48-generic N/A linux-backports-modules-6.8.0-48-generic N/A linux-firmware 20240913.gita34e7a5f-0ubuntu2 SourcePackage: linux UpgradeStatus: Upgraded to oracular on 2024-11-07 (0 days ago) dmi.bios.date: 07/16/2024 dmi.bios.release: 5.27 dmi.bios.vendor: Intel Corp. dmi.bios.version: ANRPL357.0033.2024.0716.1113 dmi.board.name: NUC13ANBi3 dmi.board.vendor: Intel Corporation dmi.board.version: M89896-203 dmi.chassis.type: 35 dmi.chassis.vendor: Intel Corporation dmi.chassis.version: 2.0 dmi.ec.firmware.release: 10.22 dmi.modalias: dmi:bvnIntelCorp.:bvrANRPL357.0033.2024.0716.1113:bd07/16/2024:br5.27:efr10.22:svnIntel(R)ClientSystems:pnNUC13ANHi3:pvrM89901-207:rvnIntelCorporation:rnNUC13ANBi3:rvrM89896-203:cvnIntelCorporation:ct35:cvr2.0:skuNUC13ANHi3000: dmi.product.family: AN dmi.product.name: NUC13ANHi3 dmi.product.sku: NUC13ANHi3000 dmi.product.version: M89901-207 dmi.sys.vendor: Intel(R) Client Systems To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2087333/+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