I can reproduce this bug by force powering off my machine (holding down the power button) and immediately starting it again. If I delay starting it, the bug does not seem to occur (but this is after a handful of attempts).
I get the bug whether I power off kernel from 5.15.0-71 or 5.15.0-70. I also got the bug when I powered off Clonezilla's version of Lunar Lobster. Therefore I believe the bug is to do with booting into kernel 5.15.0-71. In all cases I am able to boot into kernel 5.15.0-70 successfully. It might be helpful to know whether other affected users can reproduce the bug by this method. As far as I can tell these failed boots are not registering in the journal as they do not appear to be listed in the output of "journalctl --list-boots". As GRUB itself does not seem to keep logs, I am not sure what other diagnostic information to provide. Focal's kernel 5.4.0-148.165 also contains one of the two changes that are in 5.15.0-71. I might be able to try to reproduce this bug there. -- 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/2017929 Title: Kernel 5.15.0-71 fails to boot on Ubuntu 22.04 (possibly specific to Ryzen APUs) Status in linux package in Ubuntu: Confirmed Bug description: Since upgrading to 5.15.0-71 a couple of days ago, my PC sporadically fails to boot. I see the following error messages: "error: cannot allocate kernel buffer error: you need to load the kernel first. Press any key to continue..._ " I am then returned to the GRUB boot menu. This has also been experienced by two other AskUbuntu users: https://askubuntu.com/questions/1465460/after-kernel-update-error- cannot-allocate-kernel-buffer-you-need-to-load-kern . The common theme appears to be Ryzen APUs; two of us have 3400Gs and one has a 7600. In my case, the issue appears to be more likely to occur when I have to force-reboot because the system is frozen (due to a separate bug which I will link when I can find it again). But I have not yet reproduced it. Also the log files attached to this report may not contain relevant information as the last couple of boots worked correctly. I will try to capture a relevant kernel log now that I know this is a kernel issue. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-5.15.0-71-generic 5.15.0-71.78 ProcVersionSignature: Ubuntu 5.15.0-71.78-generic 5.15.92 Uname: Linux 5.15.0-71-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: matthew 1288 F.... pulseaudio /dev/snd/controlC0: matthew 1288 F.... pulseaudio CasperMD5CheckResult: pass CurrentDesktop: KDE Date: Thu Apr 27 17:49:11 2023 InstallationDate: Installed on 2022-01-14 (467 days ago) InstallationMedia: Kubuntu 21.10 "Impish Indri" - Release amd64 (20211012) MachineType: Micro-Star International Co., Ltd. MS-7B89 ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-71-generic root=UUID=7348d288-7351-45cd-8da2-592c59a4f7dd ro quiet splash RelatedPackageVersions: linux-restricted-modules-5.15.0-71-generic N/A linux-backports-modules-5.15.0-71-generic N/A linux-firmware 20220329.git681281e4-0ubuntu3.12 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to jammy on 2022-05-26 (336 days ago) dmi.bios.date: 09/28/2021 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: 2.E3 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: B450M MORTAR MAX (MS-7B89) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvr2.E3:bd09/28/2021:br5.17:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B89:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB450MMORTARMAX(MS-7B89):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:skuTobefilledbyO.E.M.: dmi.product.family: To be filled by O.E.M. dmi.product.name: MS-7B89 dmi.product.sku: To be filled by O.E.M. dmi.product.version: 1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2017929/+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