4.19.42+ kernel broke the file system, LZ4 issue, how to revert to prev kernel?

[ikke]

Well, it was 3 mins fix. Due to /boot being too small and filling up, dpkg had failed to copy commandline.txt. All good now, except that xbian should clean up the /boot a bit to make space there. 34 megs just isn't enough for all the different raspi models device tree blobs and all.

It could be the new installs already have it bigger, this is old one. Like said, it has served me well, no need for fresh installs!

And no, root is not ext4 but btrfs, it just tried to default to wrong fs due empty commandline.txt.