[Bug 1481733] Re: Kernel panic when booting with initramfs-tools version 0.120ubuntu1 generated initramfs

[Harry]

The correct workaround or fix for the time being is to downgrade the
version 0.120ubuntu1 to the working version 0.103ubuntu16.

You will need to chroot the root partition to do this.
I believe package intel-microcode has nothing to with this.

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https://bugs.launchpad.net/bugs/1481733

Title:
  Kernel panic when booting with initramfs-tools version 0.120ubuntu1
  generated initramfs

Status in initramfs-tools package in Ubuntu:
  In Progress

Bug description:
  After updating initramfs-tools to version 0.120ubuntu1 the kernel
  stops with a kernel panic during boot.

  …
  Begin Running /scripts/local-bottom...
  Begin Running /scripts/init-bottom...
  done.
  /init: exec: line 372: switch_root: not found
  Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000200
  …

  For the rest of the backtrace, see the attached image.

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