Auto brightness not working

[berfles]

For some reason I can't get my auto brightness to work anymore. It's enabled in the settings and power settings but it's not doing anything. Anyone know how to fix this?

 

[gpobernardo]

For some reason I can't get my auto brightness to work anymore. It's enabled in the settings and power settings but it's not doing anything. Anyone know how to fix this?

What phone are you using? Is it, by chance, the HTC 8S?

EDIT: Didn't check the forum tree. Now it's clear that it's NOT the HTC 8s.

 

[Qtweeder]

What phone are you using? Is it, by chance, the HTC 8S?

could it be a surface pro 3!

 

[anon(4054009)]

Do you have a screen protector installed? Some can cause this problem.