Develop Bugs

How does the autobrightness function? IE Normally.

I've noticed with my GNEX that it seems like all of the sudden it won't auto dim. When I unlock the device it will brighten if needed, however if I walk into a dimmer area it will not auto dim. Is this the normal behavior for the light sensor?
I'm used to my Xperia Play which would constantly adjust the screen up and down.

My auto-brightness setting sets the screen brightness lower than the lowest actual brightness setting regardless of whether I'm in light or dark.
There's a fix for it here: http://forum.xda-developers.com/showthread.php?t=1377410&highlight=auto+screen+brightness
I haven't tested that out though.

Kinbote said:
My auto-brightness setting sets the screen brightness lower than the lowest actual brightness setting regardless of whether I'm in light or dark.
There's a fix for it here: http://forum.xda-developers.com/showthread.php?t=1377410&highlight=auto+screen+brightness
I haven't tested that out though.
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Yea I was worried maybe the brightness sensor was not working since. Turns out my wife's droid 2 with CM7 acts the same way. Lowest setting until you unlock at which time it only increases the brightness, never decreasing.

Setting to disable dimming on white screens?

So the Lumia 900 dims the screen based on white pixel percentage (for battery) like the Focus and Focus S. Is there an extra settings option to disable this like on the Focus S?

What I'm asking is if there is an 'Extra Settings' category in the settings menu with a field called auto display intensity (like on the Focus S). Thanks.

I'm not seeing it. Today starts my 30-day trial to see if it can pull me away from my investment into Android and my HTC Desire..

I think you can just turn off the Auto brightness. There are no other display settings like on the Samsung WP7's
Sent from my Lumia 900 using XDA Windows Phone 7 App

Yeah, the screen looks a little dim on the auto setting. Someone said that is the way AMOLED screens are. When you disable the auto and change the setting to high, it looks great. I just wonder what the effect on the battery life will be.

I recommend disabling auto-brightness and setting to medium. I personally use low indoors and medium outside. Auto-brightness should be off to save power.

The original poster is correct. Even on Bright with auto turned off, the message area is grey'ish, but white everywhere else seems fine. I went and tested it with the Focus Flash, and it had the same behavior, except when you turn off the "auto display intensity" (or words to that effect) it goes white. I think the Nokia has the exact same behavior, except that we don't have a control to turn it off. I'm keeping my screen on bright to alleviate this, and I know it's hurting the battery to do so.

Seed 2.0 said:
I recommend disabling auto-brightness and setting to medium. I personally use low indoors and medium outside. Auto-brightness should be off to save power.
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Auto brightness = dims based only on the ambient light sensor. Auto display intensity = dims based on % of white pixels on the screen.

drleospaceman said:
Auto brightness = dims based only on the ambient light sensor. Auto display intensity = dims based on % of white pixels on the screen.
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Do you know of a way to switch the Auto Display Intensity?

Is there a fix to this? I got my Lumia today and when I opened the browser and loaded Google it seemed very dim. Even if you change the background of the phone to white instead of black, it looks almost grey and dimmer than some of the other whites on the phone. Is it a bug? Should I replace the phone for another one, or are they all like this?

unity04 said:
Is there a fix to this? I got my Lumia today and when I opened the browser and loaded Google it seemed very dim. Even if you change the background of the phone to white instead of black, it looks almost grey and dimmer than some of the other whites on the phone. Is it a bug? Should I replace the phone for another one, or are they all like this?
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"Feature" not a bug. Samsung presumably provides Nokia the AMOLED panel which has it programmed into the firmware. Samsung modified WP7 on the Focus S to let you disable it.

Are there any hacks to change the rules for auto brightness?

My tablet when on auto brightness becomes very dark in unlit rooms and I can barely see it videos or detail.
Sent from my GT-N5110 using Tapatalk

Mod to adjust auto brightness
6Flip9 said:
My tablet when on auto brightness becomes very dark in unlit rooms and I can barely see it videos or detail.
Sent from my GT-N5110 using Tapatalk
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I am not sure if this works with stock roms, but if you install PhilZ touch recovery from the thread... http://forum.xda-developers.com/showthread.php?t=2367151
You have options in the advanced menu to change the response time for auto brightness. The default is 1 minute, you will need to tap about 4 times to get it down to 0, as it counts up to 5.
Which sped up the delay from going from one extreme to the other in ambient lighting.
If you install his custom roms you also get options to adjust the brightness intensity in 5 steps while auto brightness is on. I found this out after some time messing with my settings.

6Flip9 said:
My tablet when on auto brightness becomes very dark in unlit rooms and I can barely see it videos or detail.
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Lux Auto Brightness - perfect app for brightness tuning - you can set you own profile - matching desired screen brightness to sensor reading, and the process is very easy.
Short info, taken from app description:
Lux isn't your ordinary brightness app. It intelligently adjusts the brightness of your display based on the environment you're in. If, for example, you step into a dimly lit room, Lux will automatically lower the brightness of your display to make it not only comfortable to read, but to also preserve battery power.
Lux provides the option to automatically adjust the backlight at fixed intervals (periodic mode), when a change in environment is detected (dynamic mode), or when the phone wakes from sleep. It's also possible to adjust the backlight manually. Simply disable automatic mode and you can use it like a traditional brightness tool!
Perhaps the best thing about Lux is that you can teach it how to behave. If the backlight is too bright or dim for your liking, simply open the provided Dashboard, adjust the brightness slider to the level you desire, then hold the link button. Lux will use this new 'link' as a reference in future.

lux and velis both work. i paid for both, but i prefer lux.

"Auto Adjust Screen Tone"

Under display settings, there's this "Auto Adjust Screen Tone" that confuses me. Looking for the explanation as for what it does, I found it supposedly plays with the screen brightness based on the on-screen image, but it's very vague. What's the point of having both this and auto brightness? How do they work together?
Setting it on and off shows absolutely no difference. Does it really save battery at all?

Doesnt really do much for me either. I think its for a better accurate brightness level when you turn on auto brightness. When you turn on auto brightness and the adjust screen tone I think that would mean that the auto brightness would adjust its brightness by the sensor next to the front camera and the auto adjust screen tone would adjust to the image being displayed makeing the brightness best for the envrioment your in(how much light is in your room). Lets say your in a dark room and your trying to veiw a dark image, so the screen would get brighter even if the sensor is saying "theres no light here" based on the screens image. Thats my guess and someone correct me if im wrong. Idk if it saves battery but I just adjust my screen brightness manually.

It should actually be an attempt to match the color temperature of the screen to your environment. For example if you're outside it'll shift everything more blue (around 5,500 degrees kelvin) than if you're indoors with a "warm white" lamp lighting the room (closer to 3,200 kelvin). All this in an attempt to make colors appear more accurate wherever you are. It's safe to assume it uses the camera to read the colors of your environment, I'm pretty sure the light level sensor only measures luminance (brightness). Hope this helps.
Sent from my SM-T800 using XDA Free mobile app

^^^ that's what you'd think from the name, but if you read the description it says adjust display brightness based on image on screen to save battery. So I think for example if you have a mostly white screen it'll reduce the brightness. If done right, you won't notice it because it'll still look plenty bright.
Has nothing to do with temperature. I wish there were a feature for that.
I'd try it for a while to see how it feels. Probably a good feature.

Occasional Color temperature / screen tint change

Has anyone noticed their screen occasionally looking slightly warmer (more yellow) than usual? Not sure if it's after the recent update or if its always been there..i think its the update.
SM-960F here
Display mode - Adaptive. But I'm comparing just the notification shade.

sl4y3r88 said:
Has anyone noticed their screen occasionally looking slightly warmer (more yellow) than usual? Not sure if it's after the recent update or if its always been there..i think its the update.
SM-960F here
Display mode - Adaptive. But I'm comparing just the notification shade.
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That is probably a result of the blue light filter. It turns on automatically at 7 pm. You can change its settings in display

Teet1 said:
That is probably a result of the blue light filter. It turns on automatically at 7 pm. You can change its settings in display
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Thanks for your reply but its not that. I checked.

Do you notice it in certain apps? There's also a "video enhancer" feature under "Advanced features" - try turning that off to see if it changes anything.
The one other way I notice the screen temperature change is in bright light - under Brightness, you can control the "screen mode" - adaptive is default, which means it automatically switches between cool and warm depending on what you're doing and where you are (in the sun, for example). Take a look at the settings there, because you can customize it a lot.
Edit: I see you said you are on adaptive, so you probably already looked at these. Have you tried making it a set setting rather than adaptive?

Try turning off auto brightness.