Ubuntu
initramfs-tools package

  1. Bug #1876376
  2. Comment #5

Comment 5 for bug 1876376

Revision history for this message
Benjamin Drung (bdrung) wrote : Re: package initramfs-tools 0.136ubuntu6 failed to install/upgrade: installed initramfs-tools package post-installation script subprocess returned error exit status 1

From looking at the available logs, the first guess why lz4 failed to write is that the partition is full. Can you check how much space you have left on /boot?