Getting the message "[ 0.283078] Initramfs unpacking failed: Decoding failed" when booting ubuntu 20.04 then boots normal
From the comments...
set back
compress=lz4
in /etc/initramfs-tools/initramfs.confrebuild your ramdisk with
sudo update-initramfs -c -k $(uname -r)
reboot
Note: Use the sudo update-initramfs -c
example, not sudo update-initramfs -u
variation.