Comment 7 for bug 1652270

for those that are are in the unbeatable state - the way to recover without data loss pending fixed kernel

either mount the ubuntu raspberry pi image or write it to another SD card, copy the files from the small boot partition (i did all to be safe) e.g. boot.scr vmlinuz etc to a folder on your machine or better still to the sd card of the failing install and overwrite the original files (take a backup first) - this will allow you to reboot into the older kernel and to properly cleanup the 1038 version until its fixed