SUMMARY Thinkpads (some? all? Mine is X1 Extreme Gen 2) have Fn key that "sudo libinput debug-events" sees as: -event3 KEYBOARD_KEY +318.463s KEY_WAKEUP (143) pressed It can be assigned as a shortcut, leading to the action that the shortcut is bound to be launched whether Fn+something is used. STEPS TO REPRODUCE 1. Have a thinkpad with Fn key. 2. Launch kcmshell6 keys and assign the key (it will register as "Wake Up") to for example "Launch KCalc", hit "Apply" 3. Try to change brightness with FN+F5/F6 (might vary depending on your exact laptop model). OBSERVED RESULT Watch a multiplication of KCalc windows. EXPECTED RESULT Well, just the brightness is changed. Or it is impossible to assign Fn on its own as a shortcut (if that is the case, use rshould be informed as to why it is not possible). SOFTWARE/OS VERSIONS Operating System: Fedora Linux 42 KDE Plasma Version: 6.4.4 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.1 Kernel Version: 6.15.9-201.fc42.x86_64 (64-bit) Graphics Platform: Wayland Processors: 16 × Intel® Core™ i9-9880H CPU @ 2.30GHz Memory: 64 GiB of RAM (62,5 GiB usable) Graphics Processor 1: Intel® UHD Graphics 630 Graphics Processor 2: NVIDIA GeForce GTX 1650 with Max-Q Design Manufacturer: LENOVO Product Name: 20QVS0FP00 System Version: ThinkPad X1 Extreme 2nd ADDITIONAL INFORMATION I have been bitten by this when trying to assign a key not supported by Plasma as per https://bugs.kde.org/show_bug.cgi?id=500651