For me its happening the same, if lz4 is activated get this initramfs unpacking failed: Decoding failed at first line of boot, if switch to gzip the error is gone, switching back to lz4 make the initramfs unpacking failed: Decoding failed back again at boot, staying at gzip for the time being.
Also no idea if relative, on my machine running Ubuntu Cinnamon 20.04 , when the lz4 is activated over the initramfs , it gives the error at boot and will not show the oem logo during boot, if gzip is activated, no error and it does show the oem logo during boot. Secure boot on my machine have been always disabled and remains disabled. ** Changed in: initramfs-tools (Ubuntu) Status: Invalid => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1835660 Title: initramfs unpacking failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1835660/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs