AMD Ryzen 9 7950X, 16x 4.50GHz, 64MB L3-Cache (Zen4) | AM5
Gigabyte X670 Aorus Elite AX | AMD X670 | AM5
NVIDIA GeForce RTX 4090 24GB | MSI Gaming X Trio
64GB DDR5-5200 CL40 Corsair Vengeance LPX | 2x 32GB
1TB Samsung 980 PRO PCIe 4.0 | M.2 SSD
4TB Seagate IronWolf | 5.900 RPM | SATA3
1000W - Corsair HX Series HX1000i 2022 | 80Plus Platinum

Ubuntu 22.04 LTS (jammy) [22.04.2]
GNU/Linux 5.15.0-71-generic x86_64

Would consistently hang in the GRUB menu with the error of the bug report
Would consistently boot fine after single CTRL-ALT-DEL

I did the following things and now it boots normally again:
apport-collect -p linux 2017929 [this fails to send for me with some bug]
sudo nano /etc/default/grub [I changed one line "GRUB_TIMEOUT=0" to 
sudo update-grub
sudo update-initramfs -uk 'all'
sudo shutdown -h now

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Kernel 5.15.0-71 fails to boot on Ubuntu 22.04 (possibly specific to
  Ryzen APUs)

Status in linux package in Ubuntu:

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:
  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

  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
   /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
   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
   0: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to jammy on 2022-05-26 (336 days ago) 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. 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: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.: To be filled by O.E.M. 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.

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