On Linux, the Keychron K2 doesn’t register any of the F1-F12 function keys as actual F keys, instead, treating them as multimedia keys by default.
This section of the document describe how to change the behavior of 'fn' key to better match what user expect.
Here a description of each behavior :
- 0 = disabled : Disable the 'fn' key. Pressing 'fn'+'F8' will behave like you only press 'F8'
- 1 = fkeyslast : Function keys are used as last key. Pressing 'F8' key will act as a special key. Pressing 'fn'+'F8' will behave like a F8.
- 2 = fkeysfirst : Function keys are used as first key. Pressing 'F8' key will behave like a F8. Pressing 'fn'+'F8' will act as special key (play/pause).
To fix this:
- Set the keyboard to Windows mode via the side switch
- Use Fn + X + L (hold for 4 seconds) to set the function key row to "Function" mode.
echo 2 | sudo tee /sys/module/hid_apple/parameters/fnmode- Optionally, reboot
sudo reboot
Once complete, my F1-F12 keys work properly, and holding Fn turns them into multimedia keys. You can use the evtest utility to check how keyboard keys are registering until you get the above combination of settings configured properly.
To persist this change, add a module option for hid_apple:
echo "options hid_apple fnmode=2" | sudo tee -a /etc/modprobe.d/hid_apple.confYou may need to rebuild your initramfs if hid_apple is included.
sudo update-initramfs -u -k all
To (re-)load the module for immediate use, run
sudo modprobe -r hid_apple; sudo modprobe hid_apple