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I wrote a Guide on how to install Arch Linux with BTRFS and (almost) Full Disk encrytion
(veprogames.github.io)
The beloved lightweight distro
The biggest problem I have with full disk encryption is that there's still no way to include /boot into the BTRFS root partition for snapshotting. Having your kernel images separate from your system snapshots makes rolling back massively painful.
You might install an older kernel version from
/var/cache/pacman/pkg
and then regenerate the initramfs. If not using NVIDIA, it's very easy to have multiple kernels installed (e. g. linux, linux-lts) to have another option if one kernel causes trouble.I'd generally recommend having the lts or mainline kernel additionally if you use custom kernels, like zen or self compiled