Getting the following error when trying to upgrade to 22.04
The upgrade has aborted. The upgrade needs a total of 616 M free space on disk '/boot'. Please free at least an additional 144 M of disk space on '/boot'. You can remove old kernels using 'sudo apt autoremove' and you could also set COMPRESS=xz in /etc/initramfs-tools/initramfs.conf to reduce the size of your initramfs.
I have done all the usual suspects removing old kernels, etc., but that amount of space takes up nearly all of the Ubuntu default boot drive space so no amount of freeing space is going to let that go through.
The giant increase in size requirements leads me to believe this is some form of error. Short of decrypting and re-sizing partitions is there anything I can try here?