Auto brightness doesn't seem to do anything

[TheSkipperCDB]

The brightness always seems to be set to whatever is selected on the slider, regardless of if Auto is checked. I've never seen the brightness adjust on auto. Has anyone else noticed this?

 

[JayWill]

It definitely does. The percentage on the slider with auto checked sets the baseline. That's as low as it'll go. If you're in a lot of light it will auto increase from there as long as it's enough light to cause higher brightness above the base. If I hold my phone under a lamp then walk to a darker area I can visually watch the brightness decrease.

Sent from my LG G2 via Tapatalk

 

[TheSkipperCDB]

The percentage on the slider with auto checked sets the baseline. That's as low as it'll go.

That's what I thought as well, but after some more testing, I think when auto is checked, the slider is actually the maximum brightness.

If you're in a lot of light it will auto increase from there as long as it's enough light to cause higher brightness above the base. If I hold my phone under a lamp then walk to a darker area I can visually watch the brightness decrease.

I did the same test with the lamp, and I Did see the brightness gradually decrease. My old phone was instant so out was obvious, but the G2 is so gradual I had to really watch the screen too notice the brightness change. The brightness also doesn't seem to get very low in very dark situations.

 

[NevetsDrassel]

The percentage set is the lowest level the scree will go, so it is the baseline. It will increase from there.

Use a flashlight in a dark room and let the light shine on the sensor on the top of the screen, you will see the screen get brighter. When the light is removed, you will see the screen darken to the baseline, or the minimum percentage sent in the options.

To see how low the screen will go, set the baseline to 0% then go into a completely dark room. That will show you the minimum screen level that you will be able to attain on the G2.

 

[bova80]

I do not think the percentage set is the lowest it will go, you just set the baseline for that amount of light. I know for a fact that I've seen it dim lower in very dark rooms.

 

[g2_havok]

I do not think the percentage set is the lowest it will go, you just set the baseline for that amount of light. I know for a fact that I've seen it dim lower in very dark rooms.

this has been my observations as well. i'm at 45% plus auto. when i'm in bed and i get a late night text, i know for sure the screen is not at 45% but much lower... easy test would be to uncheck the 'auto' option while in that state and see if the screen brightens up or not.

 

[JayWill]

Hmm maybe you're right. It's possible the slider scales the auto brightness range.

 

[NickA]

Sometimes my auto-brightness is ignored, especially when I come out of the camera app. Turning the phone ofd and back on fixes it. Sometimes in a dark room it does the same thing. It seems to remember the last brightness and just use that. Knocking-off and back on adjusts it.

 

[bova80]

One thing to remember is it takes a few seconds for the auto brightness to kick in to make sure it's not just a quick lighting change.

 

[TheSkipperCDB]

easy test would be to uncheck the 'auto' option while in that state and see if the screen brightens up or not.

When checking off Auto, the screen either stays at the same brightness or dims. I've tried various lighting scenarios and %, but never saw the screen get brighter after selecting auto.

It's possible the slider scales the auto brightness range.

I think that might be what is happening, with the slider position being the maximum.

I think the confusion is the term "baseline". When I saw that, I assumed (and I think others did as well) that meant the slider value was minimum. But based on the testing and others comments, it seems more like the maximum brightness. Which really makes more sense, since I would assume the main reason one would use auto brightness would be to save battery - and to save battery a maximum brightness value makes more sense then a minumum brightness value. So it all comes down to the poor choice of using the term "baseline".

 

[leathernuts#WP]

Download flux, it works perfect!

Sent from my LG G2 using Tampatalk.

 

[NevetsDrassel]

When checking off Auto, the screen either stays at the same brightness or dims. I've tried various lighting scenarios and %, but never saw the screen get brighter after selecting auto.



I think that might be what is happening, with the slider position being the maximum.

I think the confusion is the term "baseline". When I saw that, I assumed (and I think others did as well) that meant the slider value was minimum. But based on the testing and others comments, it seems more like the maximum brightness. Which really makes more sense, since I would assume the main reason one would use auto brightness would be to save battery - and to save battery a maximum brightness value makes more sense then a minumum brightness value. So it all comes down to the poor choice of using the term "baseline".

Baseline means minimum. If the slider is set to 50% brightness it means that the screen will always be 50% brightness or more depending on the external lighting conditions. So if the slider is set to 50% and you are in a completely dark room, the screen will always be at 50%. If you go outside into the bright sun light, the screen will go to 100% brightness providing that "Auto" in the "Brightness" menu in "Display" under "Settings" is checked.

If it is not checked, the screen will ALWAYS be at 50% regardless of whether you are inside a dark room or standing on the sun.

As indicated on the phone: "Screen brightness adjust automatically. Set baseline brightness with slider".

I hope that I was able to clarify my meaning using the term "baseline".

 

[TheSkipperCDB]

Baseline means minimum. If the slider is set to 50% brightness it means that the screen will always be 50% brightness or more depending on the external lighting conditions. So if the slider is set to 50% and you are in a completely dark room, the screen will always be at 50%. If you go outside into the bright sun light, the screen will go to 100% brightness providing that "Auto" in the "Brightness" menu in "Display" under "Settings" is checked.

If it is not checked, the screen will ALWAYS be at 50% regardless of whether you are inside a dark room or standing on the sun.

As indicated on the phone: "Screen brightness adjust automatically. Set baseline brightness with slider".

I hope that I was able to clarify my meaning using the term "baseline".

Based on that theory, if I set the slider to 5% and have auto checked, in a bright environment the screen would be very bright. On my G2, that's doesn't happen, rather the screen stays very dim.

However, doing the same test with 95%, the screen stays very bright in both bright and dark environments, which disproves my theory of the slider setting being the maximum.

Like JayWill dais, maybe the slider setting defines the brightness range used, rather than the minimum or maximum

 

[cathain]

This is so confusing, so we don't really have a definitive answer then? I was really hoping to use the auto setting as a few reviews said it was quite good?

 

[NevetsDrassel]

Based on that theory, if I set the slider to 5% and have auto checked, in a bright environment the screen would be very bright. On my G2, that's doesn't happen, rather the screen stays very dim.

However, doing the same test with 95%, the screen stays very bright in both bright and dark environments, which disproves my theory of the slider setting being the maximum.

Like JayWill dais, maybe the slider setting defines the brightness range used, rather than the minimum or maximum

I will clarify that this is how it works on my AT&T LG G2.

Set your screen brightness to 0%. Go into a dark room. Watch the screen darken from whatever it was to 0% ( which in this case is the minimum brightness value of the screen, not that the screen will "black out"). Not set your screen value to 50% in auto mode and watch the screen light up. Go outside and watch it light up even more (you will have trouble seeing this as you are now outside in a very light environment). No go back into a dimly lit room and the screen will lower to 50% of the total screen brightness value, where you have the baseline set in auto mode.

That is the way it works for me. In auto mode, if I have the brightness set at 50% in a dimly lit room, the screen brightness will decrease to 50% of the total value available for screen brightness, no less. However if I go outside in the bright sunlight, the screen will illuminate to full brightness or 100%. Once I return to the dimly lit room, the screen will darken to 50% again if the room is dark enough.

Change any value and the same will happen except at 100% brightness, then the screen will never darken, nor brighten as it will be at minimum and maximum at the same time. So if your screen in auto is set to 99% brightness, you only have 1% to play with from a dark room to bright sunlight.

You can test this by setting your baseline screen level in auto to 10%. Stay inside and use a flashlight aimed at the sensor at the top of the screen. You will see the screen brighten to 100% (if the flashlight is bright enough). When you remove the flashlight from the sensor, you will see the screen dim to the baseline value that you have set in the auto mode, in this case, 10%, if the room is dark enough. It will not darken less than the baseline shown at 10%.

Now remember, your eyes will take longer to adjust to the change in brightness then the phone will if you go from bright sunlight to a dark room.

If your phone does not do this, then I would swap it out. I will assume that this is an LG thing and not a carrier specific thing so that it should work on all versions of the LG G2.

 

[4mynikka]

Just tested this, the brightness level you set is the minimum the phone will go to. I have the lg g2 as well and it does adjust accordingly.

 

[Stanley Kubrick]

Just tested by setting the baseline to 1% and it works fine with the LG variant of auto brightness. But when I set it to 0% it basically stays at 0 brightness with out adjusting automatically. Not sure why, but that is my observation. I just wish there was a way to adjust the refresh rate of the LG notification LED. It only flashes about once every 10 seconds which is way too slow! I use light manager, which works great, but I am trying to keep 3rd part apps to a minimum, or possibly none at all!

 

[TheSkipperCDB]

Based on this thread, it seems like the auto-brightness works differently for different people. Not sure why that is - software version? carrier (I have Verizon)?

Anyway, I installed Lux and WOW! It works exactly as I want (I use Dynamically mode) as far as adjusting the brightness. The only oddity is that before I installed it, knock-on seemed to work 95% of the time the first time and 99% of the time the second time (or using 3 taps). After installing Lux, for some reason at times knock on flat out won't work, no matter where on the screen I try or how many times I try. It's maybe 20% of the time it doesn't work. And this happened right after installing Lux. For now, I've decided to live with it (I like how well Lux works that much)

 

[tsells]

You might want to also try Display Brightness:

https://forums.androidcentral.com/e...pepper.DisplayBrightness&hl=en&token=81szdmAN

There's free version to test it out, and also a "pro" version. I have used this app for a while (on previous device and now on G2) and it works well.

 

[physioprof]

I don't bother with auto brightness at all, and just manually change it as needed. In the long run, this has been less effort and distraction.

Sent from my Nexus 7 using AC Forums mobile app