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Updated to iOS 6, Autobrightness no longer works.

I just recently updated from iOS 5.1.1 to iOS 6.0 and all of the sudden, autobrightness no longer is working. I restarted my phone, re-enable and disable Autobrightness, nothing is working. Does anyone else have this same problem? Has anyone found the solution? Seems to me is a bug or something.

iPhone 4S, iOS 6

Posted on Sep 19, 2012 2:06 PM

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108 replies

Sep 20, 2012 5:43 AM in response to DraconicSide

I don't think that the auto brightness is broken -- not for me, at least -- but it does have quite different behavior now, and that is a mixed bag.


On the one hand, it responds to the ambient light level much more dramatically -- for example, outside, the brightness goes all the way up and I can actually see the phone clearly. I haven't tried using it in a truly dark room yet, but I imagine it will be a big improvement there too.


The problem is that it is dark in my pocket, so when I first take it out, the brightness is all the way down to lowest setting, and it takes a little while to readjust.

Sep 20, 2012 8:47 AM in response to DraconicSide

Well I came across a post of MacRumors that talks about that the brightness bar might be acting a minimum setting for the auto-brightness feature. So if you slide the bar all the way to the right...full brightness, you would see no change in screen brightness when auto-brightness actually kicks in. If you turn it down mostly. It will brighten up when there is high ambient light but will dim to where the slider is set in a dark room. I'm going to be testing this out. Maybe you guys can too?

Sep 20, 2012 9:05 AM in response to Mr Backlin

Mr Backlin wrote:


Well I came across a post of MacRumors that talks about that the brightness bar might be acting a minimum setting for the auto-brightness feature. So if you slide the bar all the way to the right...full brightness, you would see no change in screen brightness when auto-brightness actually kicks in. If you turn it down mostly. It will brighten up when there is high ambient light but will dim to where the slider is set in a dark room. I'm going to be testing this out. Maybe you guys can too?


This seems to work for me as you describe. Maybe it's not a bug after all. I wish we had some guidance instead of trying to figure all this out ourselves.

Sep 20, 2012 10:12 AM in response to DraconicSide

After further experimentation, I am just confused. Sometimes it seems to work as discussed. But a couple of times it has seemed to get stuck on the minimum brightness --- possibly because it started to dim for autolock at the wrong moment and that somehow bled over to the brightness setting? I can't seem to reproduce this but it has happened at least twice.

Updated to iOS 6, Autobrightness no longer works.

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