Does anyone have auto brightness problem?

Question

hi
I just got an ipod touch replacement yesterday and i just realize my auto brightness setting is weird. Because sometime when i drag the on button but the auto brightness is off. But when i drag the off button the auto brightness is on. do u guys think is the softwear problem or hardwear problem? Also do u guys think that i should go back to bestbuy and exchange it?

Answer 1

I can confirm the auto-brightness works on my 5th week iPod Touch 32GB.
I've run some experiments and I think I've got it covered right now. Let me explain.
First of all the slider has to be the minimum brightness this is the amount of brightness you start with when you unsleep/powerup your device. This is easy to test and verify because if you push the slider to the outer left and you put your device into sleep and wake it again (in a dark room) then you'll have a very dim screen; with the lowest possible brightness setting. I then turned on my strong desk light and after approximately 1 second an amount of brightness kicked in to compensate for the extra light shining directly at my ipod.
I can also confirm that it doesn't work backwards, because when I turned off my desk light, the previously added brightness did not go away. My iPod didn't revert to the very dim screen. But when I put my ipod to sleep and wake it yet again (with desk light turned off) I had yet again the very dimmed screen. So it can be confirmed that, at least on my device, putting the device to sleep and wake will trigger the ambi light sensor.
Secondly I've put the slider to approximately 1/6th of a full bar; I find 1/6th of a bar a perfect minimal brightness setting for use in a dark room. So yet again I've put my iPod to sleep in a dark room. After waking it up it launched with 1/6th of brightness level. Then I switched on my strong desk light again and after approximately 2/3 seconds this time it added more brightness to compensate for the light.
In both situations I don't know exactly how much brightness there was added but I think it's percentage based on the amount there has to be compensated for the extra light source that's shining directly on the iPod.
For a final test I've put the slider to like 5/6th, which is a very bright setting, totally not necessary to have as a minimal brightness setting but let's use it for this test. Put iPod to sleep, wake it up again (yet again a dark room). The iPod launches with a very bright screen now (5/6th of its capacity). Now let's shine the desk light again directly onto the iPod. This time it enhanced the brightness a tiny little bit, almost unnoticeable. But it did compensate a little bit for the extra light. It only has to compensate for a little bit anyways because the minimal brightness level was already set to 5/6th of the bar.
So to conclude:
* auto-brightness on iPod Touch 32GB works
* the slider is used to set the minimal brightness level
* brightness compensation kicks in at roughly 1-3 seconds after you've awaken the iPod and is under the influence of a strong light source
* after auto-brightness compensated the brightness it will not revert to a more dimmed screen unless you put the ipod to sleep again and wake it up
I hope this clears things up for all those who are having doubts.