Comment 12 for bug 1813783

Hi Kay-Heng, sorry for the delay, I'm currently on the road a lot.

I added the above, which makes ubuntu display the big icon for disabling the touchpad when pressing only the Fn button.
I tried finding the correct modifier. Unsuccessful yet.

I thought that explicitly defining the Fn button as the "function button" would solve this, and yes.. The error is gone with the following config:

evdev:atkbd:dmi:bvn*:bvr*:bd*:svnStandard*:pn*
 KEYBOARD_KEY_f8=fn

BUT this does NOT solve the key combination Fn+F5 to toggle my touchpad. Although other functions, like brightness controls (Fn+F11 and Fn+F12) and sound control (Fn+F8 for mute, Fn+F9 lower, Fn+F10 higher) all work, even without this configuration.

So nothing gained, yet.

I figured that finding the keycode for the combination of Fn+F5 would be the next step and this is what I've found so far

Without the extra configuration I've used showkey -k
keycode 125 press
keycode 29 press
keycode 85 press
keycode 85 release
keycode 29 release
keycode 125 release

Where the following is produced when I add the above configuration again:
keycode 464 press
keycode 125 press
keycode 29 press
keycode 85 press
keycode 85 release
keycode 29 release
keycode 125 release
keycode 464 release

Would this help in finding the correct modifier/configuration?