Faulty Light Sensor? - Nexus 6P Q&A, Help & Troubleshooting

Has anyone had any problems with the light sensor on their Nexus 6P?
I've noticed that it works fine if the light is shining directly onto the device, but it's not so good at picking up ambient light.
If I put my Nexus 6P and Nexus 9 flat on my desk at work, I get a reading of 225 lux on the Nexus 9 and 226 lux on the Nexus 6P - basically the same.
But if I pick up both devices and stand them upright on the desk, the Nexus 9 shows 90 lux and the Nexus 6P shows just 36 lux.
Most of the time this isn't a problem, but if I'm using it somewhere where the light levels are borderline and change a lot (like on a bus or train at night) I find that the device ends up changing the brightness a lot because there's not much light directly shining on the screen.
I've been using the free App "Sensors" from the Play Store to check the light levels - https://play.google.com/store/apps/details?id=com.calintat.sensors
Has anybody noticed anything similar? I'm running stock on build MDA89D (not had any OTAs yet).

I am seeing the same behavior with my 6P. Borderline light conditions at all, and the brightness is constantly changing.

hammersfd said:
I am seeing the same behavior with my 6P. Borderline light conditions at all, and the brightness is constantly changing.
Click to expand...
Click to collapse
Could you check the readings you get from the light sensor when it's happening?
There are lots of apps that will let you see the sensor readings.

I noticed this last night in a dark room with a few lamps on -- the brightness would just randomly increase and decrease.

Yep, was sitting on the couch last night reading in a moderately lit room and the screen would randomly get bright and then dim again. Got so annoyed that I turned off adaptive brightness and will just adjust the screen manually. My biggest complaint with this awesome phone.

Nothing to add except that I also turned off adaptive brightness as it wasn't functioning properly and was pretty annoying.

aw1974 said:
Yep, was sitting on the couch last night reading in a moderately lit room and the screen would randomly get bright and then dim again. Got so annoyed that I turned off adaptive brightness and will just adjust the screen manually. My biggest complaint with this awesome phone.
Click to expand...
Click to collapse
Would you be able to try and get some light sensor readings in that same location?
I'd be very interested to know if it's the same cause as mine.

Same thing here with the low light. It kept going bright and slowly back to dim where it should be.

Same issue. This and being virtually unable to use the phone in direct sunlight are my only two gripes.
Watching the sensor as I move around it bounces all over the place where as with my S5 the sensor readings appear much more constant.

Same issue, I wonder if it's software or faulty device

I checked out the light sensor In the lux app as I was having a similar issue, I can see the sensor go from 1 lux to 11 even though it's in a pretty dim room at night, it keeps changing...

Same for me.
Sent from my Nexus 6P using Tapatalk

+1 for this issue, when playing games in a brightly lit room, my brightness on the phone keeps constantly changing, even though I always hold my phone in the same position while playing.

I ordered replacement and will check

kolyan said:
I ordered replacement and will check
Click to expand...
Click to collapse
Is the replacement any better. I have the same issue and was not sure if it is hardware or software issue.

amfractal said:
Is the replacement any better. I have the same issue and was not sure if it is hardware or software issue.
Click to expand...
Click to collapse
Don't think it is any better. EX Kernel dev also noticed this issue and made some fix in his Kernel

kolyan said:
Don't think it is any better. EX Kernel dev also noticed this issue and made some fix in his Kernel
Click to expand...
Click to collapse
Would you have any source on this, I'd love to get this better as it's pretty god damn annoying. I'm sure it can be fixed with a kernel or xposed module.

TigerSoul925 said:
Would you have any source on this, I'd love to get this better as it's pretty god damn annoying. I'm sure it can be fixed with a kernel or xposed module.
Click to expand...
Click to collapse
Not sure what u mean by source. Download this Kernel and app
http://forum.xda-developers.com/nexus-6p/orig-development/kernel-elementalx-n6p-t3240571

kolyan said:
Not sure what u mean by source. Download this Kernel and app
http://forum.xda-developers.com/nexus-6p/orig-development/kernel-elementalx-n6p-t3240571
Click to expand...
Click to collapse
Thanks, that's what I meant with source: source of the information

Hey guys, did the ex kernel fix the issue for you? So are we sure it is a software issue and Google is gonna have a fix up its sleeve?
Cheers

Related

[Q] Auto Brightness Changes Extremely Frequently

I got my GT 10.1 this past Monday and I have noticed auto brightness changes quite frequently. I can't figure out why. I don't think I am blocking the sensor but I don't know where it is...
Has anyone else had this issue? It's making me dizzy so I just turned off the auto setting but it seems like it should work.
Yes, mine does the same. I assume the sensor is next to the front camera, which I'm not obstructing. But the brightness level will change rapidly. I had to disable the feature. Found it default to a level too dark most of the time anyway.
I agree with it being too dark. At least I know I'm not the only one with the issue.
Same issue with me. Turned it off. I read that auto brightness burns more battery than full brightness cause it's constantly asking the CPU to make a decision regarding brightness.
Sent from my Galaxy Tab 10.1 using Tapatalk.
Interesting. I always thought that one if the purposes of auto brightness was to conserve the battery.
Sent from my DROIDX using XDA App
I had this problem too. It would constantly change so i had to disable it.
Maybe samsung can put a fix out for it.
I imagine the algorithm included is very simple and uses very few cpu cycles, so I doubt it has an impact on battery life. Especially since it probably doesn't (shouldn't) run when the screen is off, so it shouldn't prevent the device from sleeping.
I agree the levels they have set are much too dim and make auto-brightness just about useless. I had the opposite problem with my Captivate, where the auto-brightness as too bright. Fortunately CM7 allows you to adjust the levels for auto-brightness. I hope we see something similar show up in a custom rom for the Galaxy Tab 10.1
Anyway, I keep mine set at 20% and that seems to work pretty well for me.
Where do you see the brightness percentage? I have a slider but don't see a percentage anywhere.
It's an approximation on my behalf.
I notice the same problem especially when holding the device vertically with my right hand on the front facing camera. I guess the ambient sensor is located somewhere where my hand is and thinks that I'm in dark room and automatically lowers the brightness. I also noticed that the brigthness change whenever I touch the screen so i guess its listening every time you touch the screen unlike the ipad where it refreshes evertytime it wakes up.
Sent from my GT-P7510 using XDA Premium App
mesasone said:
It's an approximation on my behalf.
Click to expand...
Click to collapse
Ok. I thought I was missing something somewhere...
Sent from my DROIDX using XDA App
Is very anoying, i was moving my head while the screen increase the brightness and move my head and decrease... over and over. So i switch to a custom brightness.

Automatic Brightness... Bonkers, help please

Hi,
I bought a Nexus 7 32GB Wifi version yesterday from Carphonewarehouse.
I brought it home and it asked to update, I let it update to 4.2, with automatic brightness my screen is very dim, I mean its not nice to view with automatic brightness as it seems to dim the screen to much.
I know people are having problems with latest update etc, as I updated immediately when turning on device etc I cannot be sure if this is due to the update or it was like it before the update, I would like to use automatic brightness to conserve power but it seems to dim the brightness to much and I also notice the brightness level adjusts quite a bit in same lighting and is very noticeable when viewing screen.
When using full brightness the screens brilliant.
Is this part of the 4.2 bugs ?
I disabled auto sync for Google Currents to help some performance issues for now.
As this is my first tablet and updated immediately I can't compare differences between updates to know if its just a bug.
How long does it take to charge the tablet fully approx ? as mine seems to take ages, again I am aware this is possibly another bug after 4.2 update.
PS: I here that I should have got a £15 Google credit but never got an email and I had to pay by card when I purchased a £2 app as no option to choose Google credit only to pay by card. Was this a limited time offer or something as am gutted I not got it ?
Thanks for any help/advice!
Sent from my Nexus 7 using xda app-developers app
Hi,
Unfortunately the screen flickers issue is a well known issue to nexus 7. Since you just bought it, I would recommend exchange it and hope you get a good one. Mine is having the same issue but I kinda get used to it. Good luck...
Sent from my Nexus 7 using Tapatalk 2
If automatic brightness does not work the way you want turn it off. Flicker gone.
It is a checkbox under settings / display.
I like mine best with brightness set to about 50%. An added bonus is that really extends battery life.
I highly suggest giving lux a try. I bought it because I found the minimum brightness on the n7 was too bright for night reading. It has a lot of settings to tailor the auto brightness to your taste. I turned off the android auto brightness and set the manual brightness almost all the way down and let lux adjust it from there.
4.2 totally screwed up automatic brightness, made it super sensitive. best option right now is to turn it off and change thaw brightness manually
Thanks everyone for replying, gonna just turn off auto brightness and set it to 50%, its ok at 50%, thanks much appreciated!
Fingers crossed an update will sort the sensitivity out.
Sent from my Nexus 7 using xda app-developers app
What does the flicker everyone refers to about auto brightness look like? I don't think I experience this issue. It may be the lighting I have around doesn't cause it.
What I DO have an issue with is low brightness either manual or auto in dim rooms where I don't want to be blinded, is the flickering caused by WiFi signal being low. This isn't the same issue others refer to here is it?
snarlytaz said:
What does the flicker everyone refers to about auto brightness look like? I don't think I experience this issue. It may be the lighting I have around doesn't cause it.
What I DO have an issue with is low brightness either manual or auto in dim rooms where I don't want to be blinded, is the flickering caused by WiFi signal being low. This isn't the same issue others refer to here is it?
Click to expand...
Click to collapse
If it flickers on manual - you have a different issue.
Some devices have screens that are significantly dimmer than others on all brightness settings (I've had 4 so I should know). I've got an n7 that the screen is virtually unusable on auto under some conditions. I complained and got a replacement and they've never bothered picking up the faulty one. My Mrs has it now and it doesn't bother her but, side by side with my n7, its a massive difference. If it bothers you return it because it'll really get on your nerves after a while.
Sent from my Nexus 7 using XDA Premium HD app
my device died anyway so took back for replacement. I decided not to update to 4.2 as auto brightness works excellent without update and no bugs either so will wait for a more stable update, much happier now. Thanks!
Sent from my Nexus 7 using xda app-developers app

Short bright screen flash when turning on the Note

More people experience this issue? Once in a while, when I turn on the Note, the screen brightness will go from its maximum level to the standard operating level. This happens in just a few ms, so it seems like the screen is flashing. I don't like this a bit. Faulty device or general issue?
appelflap said:
More people experience this issue? Once in a while, when I turn on the Note, the screen brightness will go from its maximum level to the standard operating level. This happens in just a few ms, so it seems like the screen is flashing. I don't like this a bit. Faulty device or general issue?
Click to expand...
Click to collapse
I think its because Deep Sleep, also have this
_xxcrimexx_ said:
I think its because Deep Sleep, also have this
Click to expand...
Click to collapse
yes deep sleep fault :cyclops:
My S3 used to flash bright green. Or blue, if it was feeling rebellious.
Haven't seen my Note 3 do it yet, but that's more because I haven't paid attention to it.
Maybe deep sleep issue or maybe hardware fault
Sent from my GT-P3100 using xda app-developers app
appelflap said:
More people experience this issue? Once in a while, when I turn on the Note, the screen brightness will go from its maximum level to the standard operating level. This happens in just a few ms, so it seems like the screen is flashing. I don't like this a bit. Faulty device or general issue?
Click to expand...
Click to collapse
When i was using stock brightness control, I noticed this happens when you switch off the screen in a well lit environment, than switch it back on in a dimmer place...since using third party brightness control, haven't noticed this anymore. Stock brightness control in auto mode sucks big time.
Sent from [email protected] Ass Note III SM-N9005
appelflap said:
More people experience this issue? Once in a while, when I turn on the Note, the screen brightness will go from its maximum level to the standard operating level. This happens in just a few ms, so it seems like the screen is flashing. I don't like this a bit. Faulty device or general issue?
Click to expand...
Click to collapse
I have this same problem!
It realy kills your eyes when your in a dark room and it flashes bright screen on wake!

Screen Brightness

Is everyone here satisfied with the screen brightness? It looks somewhat nice when the brightness is at 100% but then that drains the battery faster.
I have never used the 100% brightness - outside I'm not using the G Pad, inside I'm somewhere near 50-65% brightness, and for night reading 10-20% brightness. About battery draining, I haven't keeping an eye on it. When the battery goes near 30%, I automatically put in on the charger (I got one sexy thin 4m. USB cable here so I can keep using the tablet anywhere in my room)
Zarrick19 said:
I have never used the 100% brightness - outside I'm not using the G Pad, inside I'm somewhere near 50-65% brightness, and for night reading 10-20% brightness. About battery draining, I haven't keeping an eye on it. When the battery goes near 30%, I automatically put in on the charger (I got one sexy thin 4m. USB cable here so I can keep using the tablet anywhere in my room)
Click to expand...
Click to collapse
50-65% for me seems somewhat dim, almost too dim to enjoy the HD screen. Are there any additional settings other than the main brightness setting? I do not have auto brightness turned on at all
Indoors i hardly ever raise brightness over 40% i have no complaints. In fact 100% brightness is damn near blinding.
Faded_329 said:
Indoors i hardly ever raise brightness over 40% i have no complaints. In fact 100% brightness is damn near blinding.
Click to expand...
Click to collapse
Agreed. Brightness isn't an issue. The problem is that the gamma is too high resulting in darks being too dark.
Sent from my LG-V500 using Tapatalk 4
dalingrin said:
Agreed. Brightness isn't an issue. The problem is that the gamma is too high resulting in darks being too dark.
Click to expand...
Click to collapse
That's an interesting observation. I think there are apps to adjust the gamma. Does anybody have any tips on that?
dalingrin said:
Agreed. Brightness isn't an issue. The problem is that the gamma is too high resulting in darks being too dark.
Sent from my LG-V500 using Tapatalk 4
Click to expand...
Click to collapse
So can we change the gamma in the kernel ?
yes, I find the ugly screen (very dark) with the brightness below 60%.
by 100% against beautiful. But ouch battery !!
No, you can change the gamma (and saturation, and brightness and stuff) in an app, someone mentioned it here on xda, but I can't remember it's name. Take a look around
Zarrick19 said:
No, you can change the gamma (and saturation, and brightness and stuff) in an app, someone mentioned it here on xda, but I can't remember it's name. Take a look around
Click to expand...
Click to collapse
Screen adjuster
Faded_329 said:
Screen adjuster
Click to expand...
Click to collapse
I downloaded screen adjuster but it does not have any gamma or saturation settings. Only red, green, blue, brightness, and contrast. By the way, does anyone know how to take screenshots on this tablet?
hold Unlock + Volume down
I recommend using the app LUX. It does a terrific job of managing auto brightness. Way better than the built in logic. https://play.google.com/store/apps/details?id=com.vito.lux
Sent from my LG-V500 using Tapatalk 4
I'm slightly ahead with this advice because I haven't even looked into rooting yet. But I can tell you if Franco kernel comes out for this baby that's what you want. It fixed the gamma settings and the color settings on my Nexus 4 completely. Made it like a brand new device with beautiful accurate colors and amazing battery life to boot. I will be keeping my eyes out for Franco kernel.
Sent from my Nexus 7 using xda app-developers app

How to fix lg v20 screen burn in?

Assalam o alaikum!
I'm having a Lg v20 Us996
And I'm suffering from severe burn in issue in screen.
Can anyone please tell me how to fix this issue?
Thanks in advance
maxi65 said:
Assalam o alaikum!
I'm having a Lg v20 Us996
And I'm suffering from severe burn in issue in screen.
Can anyone please tell me how to fix this issue?
Thanks in advance
Click to expand...
Click to collapse
Because it's an lcd, it doesnt actually burn in. It's image retention or ghosting. I'm having the same problem. Lowering the brightness will help. I use automatic brightness and it works great. I've heard that using an app [Twilight] that can put a filter on the screen might help. Apply 5% filter for 30% brightness, and for every 10% brightness add another 5% filter. Example: 30% brightness, 5% filter, 40% brightness, 10% filter, 50% brightness, 15% filter, and so on. I don't know how much it will help but if it does that's always a good thing.
Audacity001 said:
Because it's an lcd, it doesnt actually burn in. It's image retention or ghosting. I'm having the same problem. Lowering the brightness will help. I use automatic brightness and it works great. I've heard that using an app [Twilight] that can put a filter on the screen might help. Apply 5% filter for 30% brightness, and for every 10% brightness add another 5% filter. Example: 30% brightness, 5% filter, 40% brightness, 10% filter, 50% brightness, 15% filter, and so on. I don't know how much it will help but if it does that's always a good thing.
Click to expand...
Click to collapse
Is there any permanent fix?
Thanks for advice
maxi65 said:
Is there any permanent fix?
Thanks for advice
Click to expand...
Click to collapse
There is no fix man, lcd will always burn in. its a hardware issue, the ghosting will go away so don't worry about it =).
maxi65 said:
Is there any permanent fix?
Thanks for advice
Click to expand...
Click to collapse
The maker of WETA has found if you lower the values of the screen just barely through KCAL compatible kernel it can stop the ghosting completely.
But that means you have to use a custom kernel that supports KCAL so if you aren't rooted you pretty much have to deal with it. It goes away eventually.
KUSOsan said:
The maker of WETA has found if you lower the values of the screen just barely through KCAL compatible kernel it can stop the ghosting completely.
But that means you have to use a custom kernel that supports KCAL so if you aren't rooted you pretty much have to deal with it. It goes away eventually.
Click to expand...
Click to collapse
Yes I've rooted my device and i have access to Kcal.
Please Confirm the values to setup in kcal to fix ghosting?
maxi65 said:
Yes I've rooted my device and i have access to Kcal.
Please Confirm the values to setup in kcal to fix ghosting?
Click to expand...
Click to collapse
I believe off the top of my head it was just lower RGB by 10 points is all it took. Ineed to double check but try that in mean time
KUSOsan said:
I believe off the top of my head it was just lower RGB by 10 points is all it took. Ineed to double check but try that in mean time
Click to expand...
Click to collapse
I tried by lowering it down by 10 but no fruit
maxi65 said:
I tried by lowering it down by 10 but no fruit
Click to expand...
Click to collapse
Sorry dude only other thing to try is putting it to what his values are on the screen I attached but he said 10 was all it should take.
KUSOsan said:
Sorry dude only other thing to try is putting it to what his values are on the screen I attached but he said 10 was all it should take.
Click to expand...
Click to collapse
ThankYou for the help
But bad news is that Ghosting effect is getting stronger and worse day by day
maxi65 said:
ThankYou for the help
But bad news is that Ghosting effect is getting stronger and worse day by day
Click to expand...
Click to collapse
Try setting them to the lower values he personally uses and see. He says he likes it darker. I've noticed brightness seems to affect quite drastically on my end
KUSOsan said:
Try setting them to the lower values he personally uses and see. He says he likes it darker. I've noticed brightness seems to affect quite drastically on my end
Click to expand...
Click to collapse
I also thinks the same that brightness is key issue which is promoting ghosting
And auto brightness seems to work a lil bit
Audacity001 said:
Because it's an lcd, it doesnt actually burn in. It's image retention or ghosting. I'm having the same problem. Lowering the brightness will help. I use automatic brightness and it works great. I've heard that using an app [Twilight] that can put a filter on the screen might help. Apply 5% filter for 30% brightness, and for every 10% brightness add another 5% filter. Example: 30% brightness, 5% filter, 40% brightness, 10% filter, 50% brightness, 15% filter, and so on. I don't know how much it will help but if it does that's always a good thing.
Click to expand...
Click to collapse
I just got my LG V20 US996 Friday afternoon & of course tested it at full brightness most of the time but will start using automatic brightness more regularly if it really helps prevent such eventual screen issues, I just noticed today for the first time on my Moto X Pure, which also has an IPS display, what looks like burn in that appeared suddenly not gradually..?
How common is (IPS vs other screen tech) burn in-ghosting-image retention with the LG V20/US996 & best ways to avoid it's if not really totally repairable? -Thnx
Finally i fixed it, AlhamduLillah!
.... How?
Supposedly the burn in for LCD displays is rare, part of why I bought the v20 in the first place. Except it's not rare, seems to happen more than it should. I ended out sending mine in for repair, barely still in warranty. I suggest those of you with issues and warranty do the same.
Screen burn in.
bond32 said:
Supposedly the burn in for LCD displays is rare, part of why I bought the v20 in the first place. Except it's not rare, seems to happen more than it should. I ended out sending mine in for repair, barely still in warranty. I suggest those of you with issues and warranty do the same.
Click to expand...
Click to collapse
How long was the factory warranty good for ? I bought mine in march.
maxi65 said:
Finally i fixed it, AlhamduLillah!
Click to expand...
Click to collapse
How? You can't just say you fixed it and then be silent about.
I'm having ghost issues as well now.
Is it the heat that makes the problem for the screen to do it? If that is the case one more reason to use a big battery like the mugen 9300 battery which keeps the heat of the phone down tremendously. Sadly iv changed back and forward on the stock battery and my big mugenpower - and now have the problem of ghost. I do mostly have my screen on 100% light all the time as one is not even able to adjust the auto function - I ordered the phone at 2017-Marts-09 and the issue has just raised in the last couple of weeks. I bumped up from 2 minutes turn on time to 5 minutes which seemed to be the time I began to get the ghost issue, which seems to be getting worse - but that could just have been a coincident.
Its not a big issue as such but it is still a little annoying having it around.
If it is an heat issue with the LCD - had I known I would just have used my big Mugenpower battery 9300 mAh all the time which keeps the phone at an stable 21-22 celsius degrees all the time. Stock battery sometimes fly over 40 Celsius when working.
It seemed there is a one year warranty on the phone but I'm not sure if it is actually worth doing anything in that regards.
Yehovah - who was , is and is to come - God Almighty.
Jesus is God Almighty said:
How? You can't just say you fixed it and then be silent about.
I'm having ghost issues as well now.
Is it the heat that makes the problem for the screen to do it? If that is the case one more reason to use a big battery like the mugen 9300 battery which keeps the heat of the phone down tremendously. Sadly iv changed back and forward on the stock battery and my big mugenpower - and now have the problem of ghost. I do mostly have my screen on 100% light all the time as one is not even able to adjust the auto function - I ordered the phone at 2017-Marts-09 and the issue has just raised in the last couple of weeks. I bumped up from 2 minutes turn on time to 5 minutes which seemed to be the time I began to get the ghost issue, which seems to be getting worse - but that could just have been a coincident.
Its not a big issue as such but it is still a little annoying having it around.
If it is an heat issue with the LCD - had I known I would just have used my big Mugenpower battery 9300 mAh all the time which keeps the phone at an stable 21-22 celsius degrees all the time. Stock battery sometimes fly over 40 Celsius when working.
It seemed there is a one year warranty on the phone but I'm not sure if it is actually worth doing anything in that regards.
Yehovah - who was , is and is to come - God Almighty.
Click to expand...
Click to collapse
The thread starter seems retarded for me sir.
I tried without success to use the 1 year warranty and sent my phone in TWICE to LG. Both times they did nothing but wipe the phone and claimed they fixed it.
I ended out going through my carrier which sent me a refurb phone, but it looked new. I would recommend anyone with similar issues do the same. You can change the colors of the screen and it improves what you can and can't see, but the burn-in is permanent.

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