[Bug 1901505] Re: upgrade to 20.10 broke haswell laptop (no regular boot, no /dev/dri/card0)

[Julian Andres Klode]

Given that it boots to the kernel, but the kernel can't setup the drm
device, I'm inclined to believe this is a kernel bug.

** Package changed: grub2 (Ubuntu) => linux (Ubuntu)

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Title:
  upgrade to 20.10 broke haswell laptop (no regular boot, no
  /dev/dri/card0)

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Laptop installed with kubuntu focal is not booting after upgrade to
  20.10 (that apparently went smooth without any error).

  - laptop hangs on boot
  - no splash screen is displayed
  - laptop can boot in recovery mode
  - in this case you do not get /dev/dri/card0 - if X is started it starts on llvmpipe
  - i915 driver is loaded, no error about it in journal or dmesg

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