EDIT see my comment below which uses a much cleaner method that avoids the noisy multple udev events and doesn’t require udev/eudev at all

This activates/de-activates the secondary display underneath the removeable keyboard properly. Note though that the keyboard is a composite unit and causes a whole train of udev events, rather than a single one, which means the desktop will flicker multiple times on each re-attachment of the keyboard :(. If anyone knows how to just run the scripts on the ‘last’ udev event, it would make for a cleaner experience. (XFCE sometimes crashes out on me due to the rapid xrandr reconfigs but it’s mostly usable).

[/usr/local/bin/usb-0b05_1b2c-in]

#!/bin/bash

if [ “$(xrandr --listmonitors | wc -l)” -gt “2” ]; then

#logger -p user.info “=== KEYBOARD REPLACED ===”

xrandr --output eDP-2 --off

fi

[/usr/local/bin/usb-0b05_1b2c-in_udev]

#!/bin/bash

export PATH=/bin:/sbin:/usr/bin:/usr/sbin

/usr/local/bin/usb-0b05_1b2c-in &

[/usr/local/bin/usb-0b05_1b2c-out]

#!/bin/bash

if [ “$(xrandr --listmonitors | wc -l)” -lt “3” ]; then

#logger -p user.info “=== KEYBOARD REMOVED ===”

xrandr --auto && xrandr --output eDP-2 --below eDP-1

fi

[/usr/local/bin/usb-0b05_1b2c-out_udev]

#!/bin/bash

export PATH=/bin:/sbin:/usr/bin:/usr/sbin

/usr/local/bin/usb-0b05_1b2c-out &

[/etc/udev/rules.d/99-zbduo2024-kbd.rules]

ACTION==“add”, ATTRS{idVendor}==“0b05”, ATTRS{idProduct}==“1b2c”, ENV{XAUTHORITY}=“/home/username/.Xauthority”, ENV{DISPLAY}=“:0”, OWNER=“username”, RUN+=“/usr/local/bin/usb-0b05_1b2c-in_udev”

ACTION==“remove”, ENV{ID_MODEL}=“ASUS_Zenbook_Duo_Keyboard”, RUN+=“/usr/local/bin/usb-0b05_1b2c-out_udev”

Now, to get your laptop keyboard working when removed, in bluetooth mode, one must

1. Ensure bluetooth-ctl is running and initiate ‘pair’ in Bluetooth by clicking ‘Create pairing with this device’ (key icon in the ‘Blueman-Manager’ window)
2. Turn on bluetooth (switch on the left of the keyboard)
3. Remove the keyboard
4. Hold F10 for 4-5 seconds until its blue LED starts blinking rapidly (kbd in pairing mode)
5. Watch your desktop notifications for the connection message with the BT challenge pin code (6 digits)
6. type the challenge PIN code on the keyboard
7. Now the keyboard should be paired.

… now if only I could get the sound device (Intel HD Audio) and brightness control working for both screens!