I have searched near and far and don't see other results. Has anyone had problems with their automatic brightness? On mine, it fluctuates from dim to bright in static light conditions constantly. It makes the feature un-usable, have to set brightness manually.
Have tried turning peek display, attentive display etc on or off. No change.
Seems sensitive, yes. Mine always gets too dim, then, when I angle the phone so the screen is awash in light it brightens right up. Same room, same arm, same position, just tilted a bit. Thanks, I hate it. Defaults to dim instead of brighter - it should default to 65% and go from there.
Android auto brightness has always been a sloppy abortion.
Use manual control, it's far easier on the eyes and mind. You can easily limit brightness to 50% or less so you don't put unnecessary wear on the OLED display
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Hi! I'm a first time poster here, have had my TP for a week now (previously used SE UIQ phones). Anyways, first I just wanted to THANK all of YOU who make these amazing apps and tweaks for this very cool phone!
Now to the point. I like the idea that the light sensor adjusts the backlight level automatically, but I find it much too bright especially in very dark conditions. Even if it's completely dark, the backlight doesn't go all the way down, i.e. I can make it much dimmer by manually setting the brightness to a low level.
Is there any way to "calibrate" the brightness for the auto adjusted backlight (so that if it's dark it would lower the brightness even more than it does now, and if it's bright it would set the backlight to 100%)?
Thanks!
Hey Everyone,
As has been mentioned many times in other threads:
1) The LCD is often the biggest battery drainer
2) The 'minimum' setting of the brightness setting is still needlessly bright.
It certainly can be pushed further down for dim/night/dark settings.
3) Certain apps "dim" the screen but are just changing the color, not the backlight. So while useful they still aren't helping your battery.
Following some tips from a different android phone, I found this file:
/sys/devices/platform_/nov_cabc.0/leds/lcd-backlight/brightness
Which appears to contain the current 'brightness #' of the LCD backlight.
Using the normal Brightness slider, the value changes from 30 - 255, with 255 being the brightest. So this clearly could be reduced further.
Setting 'Screen Filter' to 50% brightness has no effect on the value.
Here's something interesting:
Assume the screen is already set at lowest brightness.
When I use 'Widgetsoid' to set brightness to '1', the screen dims slightly, then brightens back up. The 'brightness' file gets set to 20.
'widgetsoid 20' feels the same as 'min brightness 30'. - I wonder if Android is enforcing minimum backlight?
Anyway, thought that would be interesting to note. I'm going to download some other screen dimmer apps and see what they do.
- Frank
I found this online which is very interesting reading:
http://www.scribd.com/doc/35972886/An-Analysis-of-Power-Consumption-in-a-Smart-Phone
At '30' they said the display consumed 7.8 mW, while at 255 it consumed 414 (!!!)
Various apps coud push the value to 20 - tasker, adjbrightness.
Tasker tries to set it lower but as with widgetsoid, you can see the screen get forced back up to 20.
adjbrightness can "set" it lower than 20, but the entire screen blacks out, even at 19. Remember where the other buttons are so you can restore brightness!
- Frank
Whoa, thanks for the information. That pretty insane but its an apparently in the Market: Screen Filter, saves a helluva lot of battery.
Edit: Nevermind, Frank shut me up LOL.
Sent from my HTC Glacier using XDA App
I read a thread that said that the stock rom just doesn't allow setting it that low.
Ah well
- Frank
ChodTheWacko said:
I read a thread that said that the stock rom just doesn't allow setting it that low.
Ah well
- Frank
Click to expand...
Click to collapse
Can you set it lower in other roms - like cm7?
netter123 said:
Can you set it lower in other roms - like cm7?
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Click to collapse
I've been playing with CM7 which has some nice features for customizing the auto-brightness settings as well as the "dim" value which seems to be the lowest value the screen will go to and what it gets set to when the screen dims before shutting off after a timeout.
For the Dim setting in CM7, the default is 20. The next highest setting in the picker is 18. I believe it goes down to 0 or 1. When set to 18 or lower the screen blanks out completely when dimmed. Depending on how you test this, you may have a problem getting the screen back, so be careful you know where your widget button is on the screen to bring it back... 20 seems to be the lowest value. However, while dim, in a very dark room it could certainly be even dimmer so I don't know why lower values don't work.
I've also found the light detector doesn't seem to detect a continuum of light levels. It seems to be quantized at particular values, so there's a pretty hard limit on how fine you can set the auto brightness levels since the lowest light reading it seems to take is not very sensitive. It can't seem to distinguish between a fully darkened room and a dimly lit room, so setting the lowest value automatically makes the screen too dark to be comfortable in many environments, but then too bright for a really dark room. I don't know if this is an issue with the ROM software or a hardware limitation of the sensor. I've set my lowest auto setting to 40 which seems to work well, then I manually switch it to the dim value (20) if I'm in the dark.
So, even with auto brightness off the screen will dim, seems to be a power saving feature but it's so poorly implented.
Just writting this message the brightness went from 100% to dim to 100% again, is there any solution to keep the brightness at 100% all the time?
Do you mean after a certain amount of time? It could be the dim before it auto-turns off the screen. You could extend the time it takes before it dims and turns off screen by increasing the timeout in display settings.
brezzo said:
Do you mean after a certain amount of time? It could be the dim before it auto-turns off the screen. You could extend the time it takes before it dims and turns off screen by increasing the timeout in display settings.
Click to expand...
Click to collapse
No, what I'm talking about is that the screen will periodically get dimmer during use, as a power saving measure or because of overheating, I don't know.
You need to be at full brightness to begin with to notice the drop in brightness, it's not ultra obvious but it's definitely there. The device seems incapable of staying at full brightness for a prolonged time.
I have my display set to automatically adjust brightness and pretty often the display goes haywire. The lighting I'm in won't change, but the display will suddenly become much brighter or dimmer than it was a moment before.
Is anyone else having this issue, or do I have a dud?
some here. screen brightnes going crazy before and after factory reset
I always use lux (paid) and now I have it on luma (camera source for reading the light). Works perfect!
Hi guys,
I have a cheap Chinese Cube T8Plus that I use exclusively to read comics and books at night.
It works really well for that use, but has 2 very annoying problems with backlight brightness that makes it less than ideal for low light use:
- with manual brightness, the minimum brightness is very high, and even with root and a software like brightness tweak, it stays the same (I can actually increase the minimum brightness, but not decrease it).
- with auto brightness, surprisingly on low light the screen gets a lot dimmer than with manual brightness, it makes a huge difference. But here too there is a big problem; the brightness does increase whenever I the tablet is exposed to higher light, but doesn't decrease back on low light, no matter what I do.
The only way to reset it back is to fully reboot the tablet.
I tried different roms to try fixing the issue, they all have the same behavior sadly.
Of course I know there are screen filter solutions like the twilight app, which I actually use, but it's not always enough, and kills the contrast a little bit too much sometimes.
So is there any other way to force the manual brightness to go lower, that might work for me?
If not can I override the auto brightness in some way?
Thanks