Public bug reported:

Affected package: linux-image-5.8.0-29-generic (5.8.0-29.31~20.04.1)

I'm running a Braswell system with Iris Pro graphics, which requires the
i915 Intel graphics drivers.

The system hangs right after GRUB with a black screen, only a hard 
reset/shutdown helps.
Manually removing 'quiet splash' from the boot options in GRUB results in the 
attached log output.

Further investigation led me to this bug report, which might be related to the 
problem:
https://gitlab.freedesktop.org/drm/intel/-/issues/2381

** Affects: linux-signed-hwe-5.8 (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "kernel_log.gif"
   
https://bugs.launchpad.net/bugs/1905148/+attachment/5436750/+files/kernel_log.gif

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https://bugs.launchpad.net/bugs/1905148

Title:
  5.8.0-29 freezes during boot

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