[Bug 1777045] [NEW] Initrd doesn't have proper compress format

[Jerry Huang]

Public bug reported:

It is very similar to the bug https://bugs.launchpad.net/ubuntu/+source
/initramfs-tools/+bug/1462788 reported about 3 years ago.

I'm using an up-to-date Xubuntu 18. The system is still bootable. But I
couldn't extract initramfs:

root at Chrom-agent:/tmp# file /boot/initrd.img-4.15.0-22-generic 
/boot/initrd.img-4.15.0-22-generic: ASCII cpio archive (SVR4 with no CRC)

After removed /usr/share/initramfs-tools/hooks/intel_microcode and
regenerated initramfs, the initrd could be recognized by compress
utility.

Ubuntu 18.04 LTS 
initramfs-tools 0.130ubuntu3

** Affects: initramfs-tools (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1777045

Title:
  Initrd doesn't have proper compress format

Status in initramfs-tools package in Ubuntu:
  New

Bug description:
  It is very similar to the bug
  https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1462788
  reported about 3 years ago.

  I'm using an up-to-date Xubuntu 18. The system is still bootable. But
  I couldn't extract initramfs:

  root at Chrom-agent:/tmp# file /boot/initrd.img-4.15.0-22-generic 
  /boot/initrd.img-4.15.0-22-generic: ASCII cpio archive (SVR4 with no CRC)

  After removed /usr/share/initramfs-tools/hooks/intel_microcode and
  regenerated initramfs, the initrd could be recognized by compress
  utility.

  Ubuntu 18.04 LTS 
  initramfs-tools 0.130ubuntu3

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