Comment 7 for bug 1597154

No blue smoke :) but:

root@macaron:~# python3 ./system76-fix-ecryptfs-swap
A hybrid GPT was detected. You have to sync the hybrid MBR manually (expert command 'M').
system76-fix-swap: INFO: toggling no-auto bit on partition '4' of '/dev/nvme0n1'
A hybrid GPT was detected. You have to sync the hybrid MBR manually (expert command 'M').
The device contains hybrid MBR -- writing GPT only. You have to sync the MBR manually.
Re-reading the partition table failed.: Device or resource busy

It's a dual boot on a fresh macbook air. I used the macOS command lineto resize the macOS partition and then installed kubuntu in a very standard way.
What do you recommand?