Light sensor - Samsung Galaxy S8 Questions and Answers

Noticed that light sensor of my phone doesn't work well. Every time when I put it in a pocket my phone continues to live and click buttons I don't want to click. When I close all sensors by hand screen doesn't turn off. And it is going on wihout any connection to related option in display settings. How to fix this?
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mines do the same ,it all begun when i updated mi s8+ from tmo

Same problem S8
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[Q] screen flickers on 30%-50% brightness its ok?

hi,noticed today on only 30-50 percent brightness if i go to messaging app and then press back if you watch carefully the brightness lowered/display flickers for half second like its on autobrightness or something only on 30-50. software issue? or bad unit?as the time passes this problem gonna be worse?return it?
another thing if you put a finger on front camera and then press power button its turn display on and off by itself.
is it all software issues or its my unit?i have the phone for month.stock unrooted.no complains here.
Sent from my LG-D802 using xda app-developers app
10b ver. no newer ota.
Sent from my LG-D802 using xda app-developers app
Yes Keep it on 60% auto.
It's a feature the phone turn the screen off automatically if you hit the power by mistake while the phone in your pocket,that's why if you hide the sensor and turn the phone on,directly it will switch off the screen.
but its not not on auto why its kind flickers in this percent?software issue?
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(Q) is it me or does the screen act funky in the dark?

I have noticed and become rather annoyed with this issue.
If it is dark (sometimes not very dark but dim) in my room or outside when I turn my screen on to unlock it (either knock on or power button) the screen will go black as soon as I try to touch it to unlock the phone.
I think it thinks I'm using knock off? But it happens even when I have that feature turned off. I tried my best to explain this. Lol.
Basically I wake the phone touch it and it goes back to sleep.
Sent from my VS980 4G using xda app-developers app
Proximity sensor blocked will do this. I haven't experienced this myself. Lighting really shouldn't effect it that much.

Proximity Sensor Issue

I've been getting a weird issue with my proximity sensor on my Note 4. It becomes... I suppose you could call it 'overzealous.' Even when not in a call, waving your finger over it will turn off the screen, no matter what screen it's on, home, lock, a game, Chrome, etc. And it's not just COVERING the sensor, it projects out to just over an inch away from the glass, so when I, say, go to pull down the notifications shade, the screen will turn off. It requires a restart to fix.
Anybody else had this particular issue?
You probably have some app what causing that because normally that sensor is only active during phone call. Possibly gesture control use that sensor too (when enabled). BTW proximity sensor in note 4 is set for 8 cm. It reads value above or below 8 cm but not exact distance.
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What triggers the screen to come on

I keep noticing the screen turn on when I'm holding the phone in my hand. I'm not pressing the power button
Sent from my Nexus 6P using Tapatalk
Settings->Display->Ambient Display
I read it in another thread, but found out it applied to me as well. I had Light Flow installed and it was the culprit. If I use the power button to shut off the screen, ambient display would kick the screen back on. Same happened just randomly while I'm driving down a smooth road (no sudden bumps/shakes) and the screen would randomly turn on. I switched to Light Manager and so far the behavior has stopped.
I stopped using light flow long ago as it would usually cause issues. Let me check out ambient
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Yeah ambient I don't need and disabled it
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I tried to like ambient display but ended up turning it off. It got annoying when I was holding the phone and my touch woke the phone up from ambient. What exactly is supposed to trigger this thing? Light? Motion?
No lightflow here but I do have a skinomi techglass which I thought I read could screw with the light sensor.
Yeah I feel the same way about the ambient display. I have no real need for it. My screen turned on at least 5 times while I was holding the phone in a cab. Annoying
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2nd screen keeps disappearing.

So far I hard reset my phone 2x to get it working because my 2nd screen won't stay on after main screen is off. I do even get notifications. I have the settings to stay on. .. not sure what's going in with phone...even my quick charging stopped working. Miss my note 4
Sent from my LG-LS997 using XDA-Developers mobile app
Mine goes off if the phone isn't being used. I think it's normal.
riironman said:
So far I hard reset my phone 2x to get it working because my 2nd screen won't stay on after main screen is off. I do even get notifications. I have the settings to stay on. .. not sure what's going in with phone...even my quick charging stopped working. Miss my note 4
Sent from my LG-LS997 using XDA-Developers mobile app
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Click to collapse
Make sure you're not covering the ambient light sensor on your phone. It's right in the upper left hand corner next to the front camera. (To test, with the main screen off and second screen on, If you cover the sensor with your finger on a normally working V20, after a few seconds the second screen should shut off.)
So my guess is if you're sure your Settings are set up correctly, you probably have a faulty or miscalibrated ambient light sensor on your device that's shutting the second screen off, and you should either find a way to re-calibrate the sensor or get your device replaced.
douger1957 said:
Mine goes off if the phone isn't being used. I think it's normal.
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The time should stay on and the notifications should stay on to tell u that you have a message.
Sent from my LG-LS997 using XDA-Developers mobile app
There are options under settings display to control when the second screens stays on/off. I have mine in all the time.
under the second screen settings, under settings, display look at the "more" be sure it's UN checked
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lgkahn said:
There are options under settings display to control when the second screens stays on/off. I have mine in all the time.
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I do too
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djnikkofb said:
under the second screen settings, under settings, display look at the "more" be sure it's UN checked
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Click to collapse
Yes . It's off. Time to hard reset
Sent from my LG-LS997 using XDA-Developers mobile app
Same here, what's latest update?
Hi man, I've been searching thru forums all day. Basically, I have the same issues, 1. Not fast charging (only usb-charging) 2. Second screen off when screen is off (despite the settings are set not to)
I'm on the edge of hard factory reset with very limited hopes and my ultimate guess is this is a motherboard issue.
Have you been able to fix yours?
Second screen stays off.!
Yesterday, I was working to upgrade the apps, and install some missing bloated apps by LG Electronics ltd. through the web server, i.e. apkmirror and I don't know exactly what happened. My LG V20 (LS997) Second screen stays off just apparently showing with dark ambient display that is useless at all. The display only shows with media contents by setting up with 'More' as well, and not work even all.
Fixed!! I had the same problem when every time I enabled second screen it would disappear. After looking everywhere I was able to fix it by going to the battery saver settings and pressing on the 'battery saver' option under 'power saving'. Then press 'edit mode'. Make sure 'block use of second screen' is unchecked. That should stop it from being disabled.

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