[Bug 1939975] [NEW] GRUB2 builds from Groovy, Hirsute, Impish can not boot kernel on Yoga C630 WOS

[RussianNeuroMancer]

Public bug reported:

Hello!

After upgrade working Focal aarch64 installation on Lenovo Yoga C630 WOS
(Qualcomm Snapdragon 850) I found that GRUB2 builds from Groovy, Hirsute
and Impish can not boot Linux kernel - laptop is either soft lockup
(Ctrl+Alt+Del works) or hard lockup (Ctrl+Alt+Del doesn't work) right
after "Loading device tree" message before messages from kernel appear
on the screen.

Attempts to boot with "nomodeset", "acpi=force", "earlycon=efifb"
options doesn't make any difference. On other hand rolling back GRUB2
packages back to 2.04-1ubuntu26 fixes the issue.

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1939975

Title:
  GRUB2 builds from Groovy, Hirsute, Impish can not boot kernel on Yoga
  C630 WOS

Status in grub2 package in Ubuntu:
  New

Bug description:
  Hello!

  After upgrade working Focal aarch64 installation on Lenovo Yoga C630
  WOS (Qualcomm Snapdragon 850) I found that GRUB2 builds from Groovy,
  Hirsute and Impish can not boot Linux kernel - laptop is either soft
  lockup (Ctrl+Alt+Del works) or hard lockup (Ctrl+Alt+Del doesn't work)
  right after "Loading device tree" message before messages from kernel
  appear on the screen.

  Attempts to boot with "nomodeset", "acpi=force", "earlycon=efifb"
  options doesn't make any difference. On other hand rolling back GRUB2
  packages back to 2.04-1ubuntu26 fixes the issue.

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