[Bug 1835660] Re: initramfs unpacking failed

[Tony Thuitai]

Applied the 'fix' from Comment #11 by vmc(vmclark) in Linux Mint 20. The
error is no longer logged. Some boots on my HP laptop with a 5400RPM
spinning Hard drive are slow but some are faster but some around the
same time with lz4. Hard disk performance on my laptop is better with
gzip than lz4. With lz4 the PC extremely lags when some apt packages are
being set up and configured and some final configurations after most or
all packages are installed, set up and configured but with gzip, the lag
never occurs and PC is usable. Hard disk read benchmarks are better with
gzip than with lz4. I think that lz4 is more suitable for an SSD than a
spinning hard drive

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https://bugs.launchpad.net/bugs/1835660

Title:
  initramfs unpacking failed

Status in initramfs-tools package in Ubuntu:
  Invalid
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  "initramfs unpacking failed: Decoding failed",  message appears on
  boot up.

  If I "update-initramfs" using gzip instead of lz, then boot up passes
  without decoding failed message.

  ---

  However, we currently believe that the decoding error reported in
  dmesg is actually harmless and has no impact on usability on the
  system.

  Switching from lz4 to gzip compression, simply papers over the
  warning, without any benefits, and slows down boot.

  Kernel should be fixed to correctly parse lz4 compressed initrds, or
  at least lower the warning, to not be user visible as an error.

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