I don’t think its related but might be worth a shot, I found this on another arch based forum
A recent GRUB update from Arch Linux may require you to perform some manual steps after updating your RebornOS (but before rebooting), so that your computer does not become un-bootable.
If you are planning to update your system (like by running sudo pacman -Syu), please follow the below steps after updating (but before rebooting):
1. Check if you are booted in UEFI or Legacy mode
If you are booted in UEFI mode, when you run the command ls -ld /sys/firmware/efi, you will see an output like
$ ls -ld /sys/firmware/efi
drwxr-xr-x 5 root root 0 Dec 10 09:52 /sys/firmware/efi/
If you are booted in Legacy mode, when you run the command ls -ld /sys/firmware/efi, you will see an output like
$ ls -ld /sys/firmware/efi
ls: cannot access /sys/firmware/efi: No such file or directory
2. Re-Install GRUB
Based on whether you are booted in UEFI or Legacy mode, you can run the below
Thank you! I have legacy-mode and I did all the steps you suggested before. It didn’t help. I now copied over all the files from /boot of a backup, I luckily did some days ago, to the boot-partiton on the hard-drive and it’s booting again.
Then I updated to testing again and the problem re-occured. So, I had to copy the backup once more, to downgrade again and will stay on stable until the next testing-update is announced.
Thanks to the suggestion from @lare I found the cause of all of this. In the file /etc/mkinitcpio.conf the HOOK encrypted vanished after the update. I now added it again and even installed the newer kernel 6.1 and it works with all installed kernels (5.15, 6.0 and 6.1)