[Bug 1990294] Re: Ampere AltraMax sometimes hangs after "EFI stub: Exiting boot services..."

[dann frazier]

Whether or not we can reproduce on other machines, I think we still need
to try to diagnose what is going on with papat. I think there's a series
of steps we can do to help diagnose that - I'd suggest starting w/ the
"earlycon" test.

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https://bugs.launchpad.net/bugs/1990294

Title:
  Ampere AltraMax sometimes hangs after "EFI stub: Exiting boot
  services..."

Status in grub2 package in Ubuntu:
  New
Status in linux package in Ubuntu:
  Incomplete

Bug description:
  When kernel test rebooted onto the 5.15.0-43-generic HWE kernel, no
  output appeared on the console after the EFI stub:

  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint A0
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint 92
  Checkpoint AD
  EFI stub: Booting Linux Kernel...
  EFI stub: ERROR: FIRMWARE BUG: kernel image not aligned on 64k boundary
  EFI stub: Using DTB from configuration table
  EFI stub: Exiting boot services...

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