Hi, I had this same issue while updating ubuntu 20, however, I have noticed that kernal hung error while the update stalled.
So I have added the following in /etc/sysctl.conf and rebooted the server, this issue has gone(we can apply those parameter without restarting server usings sysctl -w vm.dirty_background_ratio=5. vm.dirty_background_ratio=5 vm.dirty_ratio=10 vm.swappiness=30 vm.vfs_cache_pressure=50 I have tried 4 different vms and it works with the workaround. Kernal is used as follows; 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux I am sure the could help some people out there to resolve this issue asap. Thanks Edmand -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. 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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1835660/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp