Auto-Brightness doesn't work on Mango

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Hi, My T-Mobile DVP's auto brightness doesn't work after i upgrade it to mango. It worked in pre-mango, if i cover the light sensor or light it up, the screen brightness would be changed. But it isn't like that in mango (version 7720), no matter i do, it is always at the lowest brightness level. The light sensor still works well in EM, it can detect lux value so i think this is a faulty OS firmware.

So after upgrading to mango i lost two sensors: compass and light sensor (Well, compass still worked in EM in pre-mango but in mango it doesn't work, even in EM). I lost my faith in Dell, too . My Dell laptop dead one month after end of its warranty and cannot be repaired, now this one ...

Anyone have the same problem ?

A reset fixed mine.

Originally Posted by techrack

A reset fixed mine.

I had reset mine in the past but it didn't do much :s

Originally Posted by dilzo

I had reset mine in the past but it didn't do much :s

Hmm its not instant and it takes 5-6 seconds to adjust, because the light sensor is working fine in the EM app it means its working fine with the phone, also covering with hand doesn't work. Try putting it under a couch then put it by a windows on a sunny day.

Originally Posted by techrack

Hmm its not instant and it takes 5-6 seconds to adjust, because the light sensor is working fine in the EM app it means its working fine with the phone, also covering with hand doesn't work. Try putting it under a couch then put it by a windows on a sunny day.

Doesn't work for my DVP. I think this should be mango firmware's fault, so all DVP should have this problem. Could you please let us know which version your DVP is ?

Anyone who has upgraded to 8107, do you have this problem ? If the problem is fixed in 8107 i'll think about upgrading it manually

Try this: Turn off auto brightness, change the brightness from low to either medium or high, then turn auto brightness back on.
For some reason the brightness setting (that is inaccessible when autobrightness is on) functions as a limit when autobrightness is on. If it's set to low then autobrightness will never raise the brightness above low. Set it to high and try it again.

Originally Posted by Naffer

Try this: Turn off auto brightness, change the brightness from low to either medium or high, then turn auto brightness back on.
For some reason the brightness setting (that is inaccessible when autobrightness is on) functions as a limit when autobrightness is on. If it's set to low then autobrightness will never raise the brightness above low. Set it to high and try it again.

Good finding ! It worked ! But there is another problem . That is when i light up the sensor, it bring the screen brightness to the highest level, but it suck in that level even when i cover the sensor. I waited 2 minutes but it just didn't change, it was always on the highest level. Then after i locked/unlocked, it turned back to the lowest level.

So auto-brightness is not a completely unusable like compass, it's just too faulty to be able to use