Brightness buttons not working (but the rest of the fn keys do)

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p_squared

Commendable
Oct 5, 2016
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I have a Dell XPS 13 (2016 version) and the brightness Fn keys suddenly stopped working. I updated my display driver, but the buttons still don't work. When I press one of them, my brightness indicator shows up in the top left corner of my screen, but it doesn't move. The rest of my Fn keys work fine, only the brightness keys don't work. Windows updated recently and I'm on the Slow channel of the Windows Insider Program, so I'm thinking there's a bug in that update that broke my brightness keys. Is there a way I can fix them?
 

p_squared

Commendable
Oct 5, 2016
2
0
1,510


The keys do work for other functions. It appears to be a software issue.
 
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