[Q] Change light lv setting for lowest brightness. - Galaxy S II Q&A, Help & Troubleshooting

Is there a way to change where the light sensor readings trigger a change in brightness level?
Currently the phone change from lowest brightness to higher when reads 30lux and change to lowest brightness when reads 10lux.
It's annoying for the phone to change to lowest brightness when i still in a light up room but just pointed away from light sources. And also it's also not switching to higher brightness when i need it in a dim environment.
So, anyone know of some app that can adjust these values? Or point me some direction to work on it.

Light Sensor is Ok, but...
Using z-device test I compared the light sensor readings between SGS2 and the NS. The light sensor seems to be correct. Still, at 10 lux, the SGS2 is setting the brightness value to its lowest and the NS, not.
I'm starting to believe that there is a a problem between the mapping from the light sensor and the brightness level. If I'm not mistaken this can only be fixed/adapted within the ROM.

DoomFragger said:
Using z-device test I compared the light sensor readings between SGS2 and the NS. The light sensor seems to be correct. Still, at 10 lux, the SGS2 is setting the brightness value to its lowest and the NS, not.
I'm starting to believe that there is a a problem between the mapping from the light sensor and the brightness level. If I'm not mistaken this can only be fixed/adapted within the ROM.
Click to expand...
Click to collapse
As from what i read, S2 seems to divide the screen brightness into 5 level
http://forum.xda-developers.com/showthread.php?t=1235212&highlight=auto+brightness
However, the mapping of these five level to it's correspondence light sensors reading seems to be odd.
let's just call lowest brightness as lv1 and highest as lv5,
The phone will stay on lv1 whenever the sensors read from 0-30lux
The phone will drop to lv1 whenever the sensors read 10lux.
The gaps is just too wide to give a pleasant viewing experiences, often stay on lv1 brightness while i'm no longer in pitch black area.
if there is a way to change this, i would prefer to set it as
stay on lv1 whenever sensors read 0-5lux
drop to lv1 whenever sensors read 2lux (the lowest brightness lv is only feasible for me when inside a pitch black environment)
Since there is a file determine it's brightness value for each lv, so i'm thinking there should also one for it's mapping.

Related

[IDEA] Brightness Control for AUTO Brightness

I figured this would come along by now but for some reason it hasn't. On my iPhone I could set my brightness that the auto brightness would adjust accordingly. Because the auto brightness is generally too bright or too dark. Also maybe adding some timing controls for how long before the auto brightness adjusts. The displays in these devices suck down the battery like crazy this would help significantly.
BrandonG777 said:
I figured this would come along by now but for some reason it hasn't. On my iPhone I could set my brightness that the auto brightness would adjust accordingly. Because the auto brightness is generally too bright or too dark. Also maybe adding some timing controls for how long before the auto brightness adjusts. The displays in these devices suck down the battery like crazy this would help significantly.
Click to expand...
Click to collapse
I too thought we might have seen this by now. I know there have been some tweaks in ROMs, but a slider that sets the sensitivity or the upper/lower limits would be excellent.
u talking about this? http://forum.xda-developers.com/showthread.php?t=708660
extended controls has a auto brightness controller sort of if thats what your looking for
b33zy682 said:
extended controls has a auto brightness controller sort of if thats what your looking for
Click to expand...
Click to collapse
Extended controls has an Auto Brightness setting, same as Froyo Power Control widget.
What OP wants is auto setting where you can control sensitivity of light sensor.
Ok I'll try explaining again. Communication isn't my strong suite. Basically, on an iPhone you can set auto brightness, then under auto brightness checkbox you have a slider that calibrates the brightness throughout the range of the ambient light sensor. So it's still a brightness control it just works in conjunction with the auto brightness setting. Being able to fine tune the brightness throughout the range of the ambient light sensor would be a bonus because with the current auto brightness I can barely see the screen in daylight but it's not maxed out because I can still adjust it all the way up with the power control widget and the opposite is true at night, i could go dimmer at night and still see the screen clearly. Strictly copying the functionality of the iPhone wouldn't fully address this. An app would be ok I suppose but I'd much rather see a system mod. I really hate apps like Trackball alert, nothing against the author I just don't like running an additional app to address the lack of a feature in the OS itself.
Good thought
I agree completely. I'm a recovering iPhone user and the adjustable auto-brightness is a feature that I desperately miss. One of my top complaints about android.
This idea is fantastic. It's something I've been thinking about too (never knew iPhone has it though)
When indoors I sometimes find auto brightness too bright. When outdoors and its sunny sometimes its upper limit is not bright enough. In both situations I have to turn off auto.
Actually last night I noticed that auto brightness was dimmer than the lowest brightness setting. I reckon that a lower/dimmer threshold should be available too on the manual brightness settings.

[Q] Possible to speed up automatic brightness sensor

I use auto brightness and i notice when i turn my screen on there is a lag between when it reads the ambient light and adjusts the screen. Can this lag be adjusted or can the parameters be adjusted? I thought i read somewhere that they can but i cannot find it.

light sensor

hi all, I noticed that light sensor doesnt work properly, when I go from dark to light area, the brightness increases but when I go from light to dark area the brightness wont decrease, on honeycomb it worked properly, anybody else experiences this problem?
Same here, it goes bright but does not decrease.
I use the app https://play.google.com/store/apps/details?id=rubberbigpepper.DisplayBrightness&feature=search_result#?t=W251bGwsMSwxLDEsInJ1YmJlcmJpZ3BlcHBlci5EaXNwbGF5QnJpZ2h0bmVzcyJd
make an invisible slider on the edge of screen to adjust brightness.
is there any way to make it work properly?
Don't think so. Its pretty much unusable now.
Sent from my HUAWEI MediaPad using Tapatalk 2
There are lots of negative comments about light sensor, but i have to say it works well to me on ICS. Could be possibly massive amount of defected devices.
Lightsensor doesn't work for me either - too bad, hope it will be corrected.
Perhaps it's because I'm running ICS "General Channel".
HUAWEI MediaPad FIRMWARE(S7-301u,android4.0,C232B002,General Channel)
Do the sensor dim the light in the same session for you?
Here it turns up the light but not down again.
Sent from my U8800 using Tapatalk 2
Same here, adjusting upwards works fine, but it doesn't adjust downwards in low light conditions.
I have tried two apps that turns the light down again, custom auto brightness and lux auto brightness.
One small problem. The pad will crash on pattern unlock after sleep. I Also the light sensor will not work s after wake up sometimes.
Sent from my HUAWEI MediaPad using Tapatalk 2
mangoman said:
I have tried two apps that turns the light down again, custom auto brightness and lux auto brightness.
One small problem. The pad will crash on pattern unlock after sleep. I Also the light sensor will not work s after wake up sometimes.
Sent from my HUAWEI MediaPad using Tapatalk 2
Click to expand...
Click to collapse
I'm guessing no one has had any luck with this issue but I figure I'd necro the thread anyways. My light sensor sucks also. I used 'Android Sensor Box' to get the values coming out of the sensor. It only displays either 40 lux or 280 lux which is obviously not right. This is on Cyanogen 9, stock t-mobile ICS and the rooted international gingerbread(can't remember which one exactly).
So I was wondering if anyone who owns one of these has ever gotten a sensor value that makes any sense.
thanks
nope,
I use instead display brightness https://play.google.com/store/apps/details?id=rubberbigpepper.DisplayBrightness&hl=no
create an invisible brightness slider on theedge of the screen.
Try using custom auto brightness with the auto brightness on (there's a setting in that app that disabled the system auto brightness at screen on. Turn it off).
The original kernel only recognized 3 light levels. If you use bart's kernel it will recognize 6 levels.
Yes, I think there's a software problem because both app (lux and cua) crash hard in HMP, but I don't think fixing it is a priority.
Sent from my HTC Glacier using Tapatalk 2
How to use custom auto brightness without crashing the tablet.
There are 2 options that should be followed, other settings can be adjusted to your liking.
1. In preferences, Check Use pulsed sensor mode. Basically this option will make the app read the sensor itself instead of listening the sensor value given from the system.
2. In advanced preferences, set the sensor update speed to either half sec or 1 sec. I tried normal, but the app won't read the sensor value, so probably the slow normal maximum setting only works if you get the sensor value from the system.
You can set disable system auto brightness. I recommend it before because the setting was a "hack" which was making the system read the brightness value thus the app can get that value. Right now it's recommended that you check the disable system auto brightness.

Screen Brightness and Auto brightness

So I know there are many issues with this especially on the s3 and I did find a fix for the TW roms
http://forum.xda-developers.com/showthread.php?t=1791163
...but my issue is how the sensor perceives brightness. My problem is the sensor reads a dim room at 0 much like it treats a pitch black room. So when I adjust the brightness to be low at 0 for when I'm in a dark room (bed) it also gives me the same brightness level in a dim room. Any solutions for this. I would like to adjust what 0 means.
I`am using Lux Autobrightness from Google Play, the paid version (not expensive) and it works for me. You can set values so the backlighting of the screen is raised or lowered for a good screen view.
gee2012 said:
I`am using Lux Autobrightness from Google Play, the paid version (not expensive) and it works for me. You can set values so the backlighting of the screen is raised or lowered for a good screen view.
Click to expand...
Click to collapse
I use it too but the problem is that 0 for the brightness sensor is the same in a no light and low light situations.

Brightness Sensor bug (w/video)

I despise the stock brightness control, but i've never been able to switch to a more sensitive/dynamic brightness control host because of the odd behavior of the stock sensor. This isn't a matter of the sensor not having appropriate granularity, it seems that the input drops to zero when transitioning through brightness levels up to ~200 lux. Here's a video. Thoughts? I just used this app because it's a good representation, but raw sensor output from any app behaves the same.
http://www.youtube.com/watch?v=MF51kC9G3GQ

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