Possible explanation and fix: in my case it seems the error message appeared since I enabled secure boot (which I think was disabled when I installed Ubuntu). Look below, from my journal:
Dec 05 15:07:52 elite kernel: secureboot: Secure boot could not be determined (mode 0) Dec 05 15:07:54 elite systemd[1]: secureboot-db.service: Succeeded. Dec 05 15:14:19 elite kernel: secureboot: Secure boot enabled Dec 05 15:14:21 elite systemd[1]: secureboot-db.service: Succeeded. You can see that on December 5th I booted at 15:07 without secureboot and starting with 15:14 with secureboot enabled. And now, let's see when the error message appeared first: $ journalctl|grep "unpacking failed" Dec 05 15:14:19 elite kernel: Initramfs unpacking failed: Decoding failed Now a possible fix (it was possible for me, it might be possible for you too): What I did is that I switched compression to gzip, the message dissapeared, then back to lz4, still there is no sign of error (same result as tom in #18). My guess it that there is no need to switch it to gzip and back to lz4, but just regenerate initramfs (which we did after changing compression) with "sudo update-initramfs -u". Maybe this takes into account that now I have secureboot enabled and generates a "compatible" initramfs. Someone else should confirm if the fix works for them too, then I guess this bug can be closed. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1835660 Title: initramfs unpacking failed 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1835660/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
