MacBook Air 6,2 Fn keys not working and getting stuck on lockscreen when it sleeps.

[marsh tundra]

The following keys Brightness (F1 and F2), Keyboard Back-light (F5 and F6) and Volume Keys (F11 and F12) are suddenly just stopping then when I try to restart the computer they come back just before it restarts.

The lockscreen is getting stuck everytime I get logged out due to inactivity and I have had to restart three times due to it quiting unexpected.

I have tried to reinstall the post install root patchs and still nothing has changed. It's just getting worse.

[edgy oar]

Are you able to remap the keys in Keyboard settings, and do they function then?

[marsh tundra]

I check the menu and discovered this, I have remapped the keys back to F1 and F2.
I still can't see the F5 and F6 for brightness and F11 and F12 for Volume... any Ideas how to go about those ones?

[edgy oar]

Hmm, you could test to see if those keys are registered with the BetterTouchTool utility

Like, assign another key combination and see if volume is functioning at all