[Bug 1899666] Re: failed do-release-upgrade to 20.01 from 18.04.5

[David Miller]

This appears to be related to free space on /boot.

I deleted all kernel 4.15 files from /boot and then update-initramfs was
able to complete.

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https://bugs.launchpad.net/bugs/1899666

Title:
  failed do-release-upgrade to 20.01 from 18.04.5

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  update-initramfs: Generating /boot/initrd.img-5.4.0-48-generic
  Error 24 : Write error " cannot write compressed block
  E: mkinitramfs failure cpio 141 lz4 -9 -l 24

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