I just solved this for my system. Hopefully people encountering this have an existing bootable kernel from before the upgrade. If so, use that to boot into the system then run:
sudo apt install cryptsetup cryptsetup-initramfs sudo update-initramfs -c -k [kernel version needing fixing] eg sudo update-initramfs -c -k 6.8.0-49-generic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/2067913 Title: after 23.10 to 24.04 upgrade zfs encrypted boot drive won't decrypt Status in zfs-linux package in Ubuntu: Confirmed Bug description: After performing an upgrade from ubuntu-mate 23.10 to 24.04, upon final reboot, there is an error message displayed indicating rpool fails to get an encryption key (zfs key load errorl and the booting process stops. This error has been reproduced on two different laptops both upgrading from 23.10 to 24.04. After rebooting again and selecting advanced options, if I select the 23.10 6.5 kernel and continue, booting continues and I'm able to enter the decryption passkey and system boots to login prompt as normal. The issue seems to be confined to ZFS within the 6.8 kernel To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/2067913/+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
