Database Users

nexus 7 (auto) brightness problem

hey guys!
im a proud owner of a n7 since tuesday.
setup:
after the first setup of the n7 i unlocked the bootloader and flashed superuser. (did setup again after unlocking bootloader)
problem:
the screen turns off after a few minutes playing with the device and can not be started again.
turned out that the problem was the brightness (i was scared to have bricked it )
i could reflash the factory image, and set the brightness to manual setup. (rooted again, because factory image did not fix the problem)
the device works fine (except of some flickering and auto brightness), but its annoying.
it seems that some more owner of a nexus 7 have this issue.
see the folowing youtube video:
*/watch?v=enzWLwVKSHs
(sry, im not allowed to post links, so just replace the "*" with "youtube.com" )
is there any solution for this issue? (i think its software related, because the manual brightness would also let you disable the whole background lightning)
thanks in advance, lucas

nobody has a fix or a suggestion to fix this issue?

bump

I would return it to Google and get a new one. I had a screen flickering problem as well as image burn and they sent me a new one now problem.
Sent from Sexus 7

I not think they will send you a brand new one, they just give refurbish. As told me someone, the auto brightness problem is not hardwares problem.
Sent from my GT-N7000 using xda premium

i do also think, it is not hardware related.
so i think, i will wait for a fix.
anybody found a fix already??

testcenter said:
i do also think, it is not hardware related.
so i think, i will wait for a fix.
anybody found a fix already??
Click to expand...
Click to collapse
After upgrade to 4.2, the problem became more apparent, cycling from dim to a bit brighter every one minute or so in a pretty constant ambient lighting. Called the customer service, told to do a factory reset, did that and the cycling is much less frequent. But factory reset method is too painful: lost all my customizations and files. It got to have a simpler solution, clear some setting property, perhaps.

My brightness slider and auto-brightness DO NOT.

And more specifically and as far as I can tell, if the phone is freshly booted then the functions listed above work. However, after several hours on I go to adjust the brightness and the screen does NOT change its brightness no matter whether i set auto-brightness or adjust it manually.
Let me preface this topic and let you all know that I still have my stock screen protectors attached and I've installed the light flow app if that matters.
Any ideas?
EDIT: I such at naming titles.

same here, just wiped. no clue what's causing it

Same for me I just noticed this. Hope its something fixable in an update.
Sent from my Nexus 4 using xda app-developers app

i don't have this problem, auto brightness and slider always work

Auto brightness doesn't work
I am having this problem too... Works for the first while, then doesnt work at all...
*** Ive commented on a logged issue with google, ISSUE 40378
https://code.google.com/p/android/i....2&colspec=ID Type Status Owner Summary Stars

I uninstalled ledblinker and it seems to solve the problem. Do you guys use lightflow? That might be the culprit

ceejay83 said:
I uninstalled ledblinker and it seems to solve the problem. Do you guys use lightflow? That might be the culprit
Click to expand...
Click to collapse
It doesn't make a difference if I use lightflow or not it just won't act right.
Sent from my Nexus 4 using xda app-developers app

Jefferyrbrown1983 said:
It doesn't make a difference if I use lightflow or not it just won't act right.
Sent from my Nexus 4 using xda app-developers app
Click to expand...
Click to collapse
Have you tried wiping? I haven't had any issue since

Ugh never mind, brightness got stuck again.

Wow am i glad to have found this thread, i have been battling this problem since day one with this phone, and i have been trying to track it down with usb debugging but have been unsuccessful. What happens is that my screen will randomly shut off and be non responsive for 5 seconds and when i can turn the screen back on, i can no longer adjust the brightness and only a reboot will solve the issue. It also occurs when i am not using the phone so i think it is a hardware issue but i am uncertain.
Things i have tried to fix it:
Factory reset
Fastboot flash factory image
Flash cutom ROM & Kernel

Didn't realize it before but yes, my screen randomly turns off, then the brightness gets stuck. Thought it was timing out
---------- Post added at 03:52 PM ---------- Previous post was at 03:46 PM ----------
You guys use auto brightness? Maybe that might be it

This happens to me occasionally too, haven't been able to determine what triggers it. It's almost as much fun as the magical battery levels. Plugged in the other day, went from 4% to 100% in a nano second.

interesting...my auto and slider work just fine

ugh still getting this problem daily. does't matter if auto brightness is on

There is no solid way to reproduce the problem, so I am willing to bet its a hardware issue. I will be calling T-Mobile this week to replace it.
Sent from my Nexus S

Of the people who are experiencing it, how many have a notification drawer widget (Widgetsoid, Power Controls, et al?) and have a brightness toggle on it?
I've removed brightness from Widgetsoid to see if it's a conflict of some sort.

CMNein said:
Of the people who are experiencing it, how many have a notification drawer widget (Widgetsoid, Power Controls, et al?) and have a brightness toggle on it?
I've removed brightness from Widgetsoid to see if it's a conflict of some sort.
Click to expand...
Click to collapse
Yes I'm using power controls. Still does it even if I disable the brightness toggle

Hmmm...wonder if there's a submission on Gerrit, shall troll later.
Sent from my Nexus 4 using Tapatalk 2

CMNein said:
Hmmm...wonder if there's a submission on Gerrit, shall troll later.
Sent from my Nexus 4 using Tapatalk 2
Click to expand...
Click to collapse
Might be a hardware issue? If it was software I think a lot of people would be complaining about this.
Edit: ugh as I was typing this post, screen flashed and turned off with broken brightness. I just rebooted like 5 min ago too

ceejay83 said:
Might be a hardware issue? If it was software I think a lot of people would be complaining about this
Click to expand...
Click to collapse
Not sure. Here's one report on Google Code: http://code.google.com/p/android/issues/detail?id=40378
Edit: could just as easily be a OS issue, if it decides to stop polling the light sensor for some reason. Many people have the battery bug as well, which seems to stop polling the battery for some reason.

Nexus 4 Auto Brightness does not change at all

Evening all,
I've had my nexus 4 for around a month now and I've only just noticed that the Auto Brightness does not work what so ever. It's set to automatic as stated - but no matter what the surrounding light is - it just never changes!
I've scouted the forum and can only see people stating other problems with there Auto Brightness, none that are relevant to mine. But I do apologise if it has been mentioned before, I just couldn't find it.
Thanks for the help.
Jay.

I used to use Velis Autobrightness before I moved to CM and a Custom kernel.
It's free in the store. You can adjust the sensitivity as well so it changes more/less instantly.

jayclarke said:
Evening all,
I've had my nexus 4 for around a month now and I've only just noticed that the Auto Brightness does not work what so ever. It's set to automatic as stated - but no matter what the surrounding light is - it just never changes!
I've scouted the forum and can only see people stating other problems with there Auto Brightness, none that are relevant to mine. But I do apologise if it has been mentioned before, I just couldn't find it.
Thanks for the help.
Jay.
Click to expand...
Click to collapse
You can try downloading lux from the play store and see if that works. It can tell you how much light your ambient sensor is reading. If auto brightness works with lux, it's a software bug so flash a custom rom or re flash your rom. If lux says your ambient sensor doesn't read different values, you probably have a defective sensor.

Light sensor not working or a system issue?
hey guys i noticed a couple of days ago that my auto brightness is not working as it used to i.e. it doesnt change at all....i figured that this might be a system software issue so i tried a couple of auto brightness apps and one of them worked for like half a day and now even that wont change the brightness at all...now im worried that there is a problem with my ambient light sensor!!! can someone please help me with this??!! thanks!!!!
---------- Post added at 06:29 AM ---------- Previous post was at 06:00 AM ----------
jayclarke said:
Evening all,
I've had my nexus 4 for around a month now and I've only just noticed that the Auto Brightness does not work what so ever. It's set to automatic as stated - but no matter what the surrounding light is - it just never changes!
I've scouted the forum and can only see people stating other problems with there Auto Brightness, none that are relevant to mine. But I do apologise if it has been mentioned before, I just couldn't find it.
Thanks for the help.
Jay.
Click to expand...
Click to collapse
I have the same issue Jay. I can't get any help with it either....i tried a couple of autobrightness apps from the play store and one of them worked for half a day and then even that stopped working...so im in a dilemma of whether it's the system software or the phone's sensor which is the problem. Let me know if you find something out... thanks

Backlight going down/up...

I don't even know if my eyes are cheating me, or the tablet is indeed have a problem.
(If you followed my previous topic, this is the second tablet I got, brand new.)
Noticed the issue in Hangouts first, with AI keyboard and dynamic screen mode.
Disabling dynamic seemed to fix the issue.
But yesterday I saw it again... at least I think.
It was only a Chrome window, and I was reading news.
The screen went from lighter to darker while I did nothing with the tablet.
Anyone else seeing/having the same issue?
It's so damn annoying.
I mean, I never had such issue on my displays on any device. That's why I think it's not my eyes...

h8Aramex said:
I don't even know if my eyes are cheating me, or the tablet is indeed have a problem.
(If you followed my previous topic, this is the second tablet I got, brand new.)
Noticed the issue in Hangouts first, with AI keyboard and dynamic screen mode.
Disabling dynamic seemed to fix the issue.
But yesterday I saw it again... at least I think.
It was only a Chrome window, and I was reading news.
The screen went from lighter to darker while I did nothing with the tablet.
Anyone else seeing/having the same issue?
It's so damn annoying.
I mean, I never had such issue on my displays on any device. That's why I think it's not my eyes...
Click to expand...
Click to collapse
Try turning off "Reading Mode": [Settings] -> [Device] -> [Display] -> [Reading Mode = Off]
Just a thought.
This may be a silly question, but, is your brightness set to auto?

HumanCaviar said:
Try turning off "Reading Mode": [Settings] -> [Device] -> [Display] -> [Reading Mode = Off]
Just a thought.
Click to expand...
Click to collapse
Yeah, did that yesterday night as a last resort. Didn't notice the issue happening since then, but I will keep an eye on it.
By the way, now I have a working tablet, I'm quite satisfied. (Except this.)
Thanks for the tip!

h8Aramex said:
Yeah, did that yesterday night as a last resort. Didn't notice the issue happening since then, but I will keep an eye on it.
By the way, now I have a working tablet, I'm quite satisfied. (Except this.)
Thanks for the tip!
Click to expand...
Click to collapse
I believe it happens whenever an image is shown. So you will probs notice it when text takes up the entire screen and as you scroll down the page and an image comes into view the screen will change brightness.
Just have to get used it a guess. I kinda am lol.
Sent from Galaxy Note 10.1 2014 Edition via Tapatalk.

the tablet has dynamic backlighting that i haven't seen anywhere to turn off (it's not the screen mode, i have that set to movie). there was a thread about it earlier and i think only the OP and i were able to see it. it's a lot subtler than other devices but when you have a dark scene the screen dims a bit, then when you have a "bright" scene the screen increases the backlight a bit.

I have this issue and its especially noticeable with gifs on screen.

Zerogamer100 said:
I have this issue and its especially noticeable with gifs on screen.
Click to expand...
Click to collapse
Thanks fellas!
Back to Samsung it goes!
Well, at the moment I contacted the local consumer rights service and will try to use the law against the carrier.
Which basically means that they will have to refund me for both the tablet and mobile data fees.
Yeah, this provider got the best prices. And the worst customer service.
And yeah I waited YEARS for this tablet to arrive (I missed the original 10.1 bandwagon)... and it's riddled with bugs. Don't even know what to do if they do refund.
Should I buy an iPad? But that's dumb as a rock. A normal tablet? What's the point in that?
So yeah. Wait for the Note Pro? But who knows if it won't have the same... or even more issues?
Yeah, #firstworldproblems, I know.
But I had a Latitude XT2 laptop with a pen. Most magical thing ever.
I just wanted to write again. ;_;
pls sammy why u do dis to us...
@madsquabbles: Nah. I disabled dynamic, set it to normal or what. Auto backlight is off ... I checked everything.
This is not a feature, but some stupid power management or firmware issue. Not that Sammy would address either. (See the lack of 4.4 or multi-seat support. The tablet is far from brand new.)
ps.: I don't think it's that two of you could see it. You two had the same panel issue as I do. (Remember, Apple also loves to mess up things like this. Like their latest problem with the Retina MBPs had the burn in problem. It was the same machine, but two companies were shipping the LCD panels. One was faulty, other one was perfect. I suspect the same.)
@Geordie Affy: I found this issue happening on news sites. But now it happened on a wall of text (it was a news site again, but without any images.) And today, even in LectureNotes. Not that it's bad, BUT it's annoying as hell.
Baaah. Sorry guys for "mentioning", I just tend to use this stupid mail symbol to refer to people.
Silly internet. There are no symbols left that would cause no harm. ;_;

h8Aramex said:
Thanks fellas!
Back to Samsung it goes!
Well, at the moment I contacted the local consumer rights service and will try to use the law against the carrier.
Which basically means that they will have to refund me for both the tablet and mobile data fees.
pls sammy why u do dis to us...
Click to expand...
Click to collapse
Use the law against carrier? Good luck.
If everything else works, as you said, then why don't you fix this issue (not sure if it's a bug, as you call it).
Turn the auto brightness off, control it yourself.
Or install lux, if you're rooted, and you have much better control.

ddavtian said:
Use the law against carrier? Good luck.
If everything else works, as you said, then why don't you fix this issue (not sure if it's a bug, as you call it).
Turn the auto brightness off, control it yourself.
Or install lux, if you're rooted, and you have much better control.
Click to expand...
Click to collapse
This is different. It's not auto, it's not scene mode, it's not what you think it is.
Uhm... okay how can I explain this.
If you don't have it, you can't guess what we mean.
It's like... you are reading some text, and it goes darker, then brigher, then darker. At the very same screen, even if you stop scrolling.
Then if you got images, it can become worse.
It's terrible because you spend like 10 seconds each time to check if you eyes are bad or there is something fishy going on.
As I said it's possible a faulty panel provider or something.
Now I'm on the carrier-war. If I lose that, I'll send the tablet back to Sammy for LCD replacement/repairs.

I have seen this exact issue and have been able to reproduce it on my friends unit as well. Open up snote.. Start recording a voice memo and watch.. The screen flashes dim and bright. Dim and bright.. It drove me nuts.. Then I noticed.. It was actually doing it in unison with the red blinking dot of the voice memo. So I think it's something where there is an animated gif/pic on screen. I will test turning off reading mode to see if that fixes it and report back. I think I also have mine set to dynamic
Sent from my HTC One using Tapatalk

it's more of a gimic than anything. it's a way to boost contrast numbers without any real benefit to the end user, imoh.

Two fire tablets showing different brigtness

Hi guys,
I have to fire 7 in tablets both bought at the same time from same place. Both are running the same Lineage-12.1 ROM (12.1-20170802-Unofficial-ford)
But for some reason when i keep them side by side one of them has a very dull screen brightness where as the other is nice and visible. I am not sure if this has to do with the hardware or some missing setting in the one that is dull. I tried making both 100% bright from the upper menu but the screen difference is still the same.
The bottom image is the brighter one. Any idea if some setting somewhere is causing this?
Thansk
matt

amti366 said:
Hi guys,
I have to fire 7 in tablets both bought at the same time from same place. Both are running the same Lineage-12.1 ROM (12.1-20170802-Unofficial-ford)
But for some reason when i keep them side by side one of them has a very dull screen brightness where as the other is nice and visible. I am not sure if this has to do with the hardware or some missing setting in the one that is dull. I tried making both 100% bright from the upper menu but the screen difference is still the same.
The bottom image is the brighter one. Any idea if some setting somewhere is causing this?
Thansk
matt
Click to expand...
Click to collapse
On checking further I noticed that the tablet which is showing dull color seems to show the exact same even when I adjust the brightness slider in the top menu. When the slider is on 0 or 100% its the same. that tells me that the software slider is somehow broken?

amti366 said:
On checking further I noticed that the tablet which is showing dull color seems to show the exact same even when I adjust the brightness slider in the top menu. When the slider is on 0 or 100% its the same. that tells me that the software slider is somehow broken?
Click to expand...
Click to collapse
Known kernel issue with custom ROMs. Symptoms typically rectified with a reboot. If no joy try a full power down with a 5 sec pause before restarting.

Davey126 said:
Known kernel issue with custom ROMs. Symptoms typically rectified with a reboot. If no joy try a full power down with a 5 sec pause before restarting.
Click to expand...
Click to collapse
Sorry for the late response Davey126, for some reason it didn't post my reply when I used my cell phone the other day. I tried to restart a few times but still have the same screen issue the brightness controls dont respond. Will upgrading to the latest release help with this issue? Is there any other fix to permanently fix the problem?
Thanks for your help.
thanks,
Matt

amti366 said:
Sorry for the late response Davey126, for some reason it didn't post my reply when I used my cell phone the other day. I tried to restart a few times but still have the same screen issue the brightness controls dont respond. Will upgrading to the latest release help with this issue? Is there any other fix to permanently fix the problem?
Thanks for your help.
thanks,
Matt
Click to expand...
Click to collapse
Probably not. Likely have to sideload a full version of FireOS to refresh/replace the kernel - then start over. There is no known 'fix' for the problem other than keeping memory load to a minimum (or using the swap tweaks that I outlined elsewhere).

Davey126 said:
Probably not. Likely have to sideload a full version of FireOS to refresh/replace the kernel - then start over. There is no known 'fix' for the problem other than keeping memory load to a minimum (or using the swap tweaks that I outlined elsewhere).
Click to expand...
Click to collapse
Ok thanks for your help Davey126