andrebrait

Here is the best setup (I think so :D) for K-series Keychron keyboards on Linux.

Note: many newer Keychron keyboards use QMK as firmware and most tips here do not apply to them. Maybe the ones related to Bluetooth can be useful, but everything related to Apple's keyboard module (hid_apple) on Linux, won't work. As far as I know, all QMK-based boards use the hid_generic module instead. Examples of QMK-based boards are: Q, Q-Pro, V, K-Pro, etc.

Most of these commands have been tested on Ubuntu 20.04 and should also work on most Debian-based distributions. If a command happens not to work for you, take a look in the comment section.

Make Fn + F-keys work (NOT FOR QMK-BASED BOARDS)

Older Keychron keyboards (those not based on QMK) use the hid_apple driver on Linux, even in the Windows/Android mode, both in Bluetooth and Wired modes.

phracker

Unpacking XIP files on Linux:

1. Install xar from https://mackyle.github.io/xar/
2. Install pbzx from https://github.com/NiklasRosenstein/pbzx (use gcc -llzma -lxar -I /usr/local/include pbzx.c -o pbzx and copy the binary into your PATH)
3. use xar -xf XIP_FILE -C /path/to/extract/to
4. Change to the directory where you extracted the file.
5. Use pbzx -n Content | cpio -i to extract the contents.