Database Develop

Nexus 7 screen flicker: a potential software fix

I think I might have a software fix for the Nexus 7 screen flicker.
Screen flickers in low brightness and when using WiFi.
To solve this I am using an app called Screen Filter.
https://play.google.com/store/apps/details?id=com.haxor[/url]
When I want to dim the screen I first turn the brightness UP and then use screen filter to lower it back to the level I actually want to use. This gives me a dim screen, and I have not notices any flickering when hitting WiFi. Does this work for anyone else?

This does only mask the problem for those that has it. It does not actually solve the problem. It has been covered multiple times in other threads.

Masssy said:
This does only mask the problem for those that has it. It does not actually solve the problem. It has been covered multiple times in other threads.
Click to expand...
Click to collapse
Oh well

ive (and others) had good luck fixing minor flicker with an app called lux..see the main flicker thread for more info...
Sent from my Nexus 7 using Tapatalk 2

nolook said:
ive (and others) had good luck fixing minor flicker with an app called lux..see the main flicker thread for more info...
Click to expand...
Click to collapse
I had what I would consider serious flicker and using Lux immediately and completely eliminated the problem.

Is the pink tint on all devices or is it a defective screen issue?

Hi, I have noticed the pink tint to the screen when using adaptive brightness below 30-40% and was wondering if it effects all devices.
I have read a lot of people talking about it and that it happens because the screen goes so dark and some people are saying that it is supposed to happen. Is this true and if not is it effecting all devices?
I am on my 3rd device now the first one i took back after a few hours as the screen was tinted really yellow and uneven and my second one had image retention pretty bad and would happen after 5 seconds of the nav bar being displayed and i dont know if it effected them as i didnt try adaptive brightness as i didn't ha e them for long enough.
The one thing i find really weird though is that i have been using the lux app to test if it was to do with the phone going so dim and while there is a slight pink tint when putting the brightness down on the lux app it is no where near as bad as when adaptive brightness is being used and the lux app goes a lot darker.
Thanks.

I've seen all does it specially at night. I consider this is normal

Its because you're brightness is below 0. If you use adaptive brightness at night its lower than 0 without adaptive brightness. You will see the same thing if you use the lux brightness app.
Edit: I noticed you used the lux app, you're correct its not as bad with it, but it's still there. I could be a software implementation or a bug for all we know.

So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.

lew87ys said:
So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.
Click to expand...
Click to collapse
Search
http://arstechnica.com/gadgets/2014...e-premium-price-still-comes-with-compromises/

lew87ys said:
So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.
Click to expand...
Click to collapse
This is more of a feature than a defect, frankly...
Not that it is pink, but that it can be dropped down as low as it can.
Basically, there is a minimum brightness threshold. The lower the brightness, the less power it consumes. If you set the brightness below a certain point, the colors (because of the nature of the amoled) will start to mess up a bit. Most vendors will set the minimum brightness high enough to not have this happen. Google sets it a bit lower to save a bit more power, without making the colors go *entirely* crazy by setting it WAY too low.

Its made like that to conserve power. All nexus 6 are like that

I thought it was a defect too until I started researching and like someone suggested turned off adaptive brightness which made the tint go away completely even at lowest brightness setting.
Sent from my Nexus 6 using XDA Free mobile app

pwc realtor said:
I thought it was a defect too until I started researching and like someone suggested turned off adaptive brightness which made the tint go away completely even at lowest brightness setting.
Click to expand...
Click to collapse
Adaptive brightness is actually a really nice feature.
If the pink bugs you too much, you can (if you know your way around a compiler, that is...) bump up the minimum a little.

What if adaptive brightness is off, and the brightness is set to at least 70%, and the pink tint crap still happens? kernel issue? nougat issue? Because it's very annoying, randomly happens to me. usually, going into twrp and clearing cache fixes it. sometimes it doesn't though.
Help.
EDIT
Never mind. I figured it out. it was night mode that was causing the pink tint via purenexus settings.

Brightness issues

I have this weird brightness problem where I have it at 50% and it would randomly dim and brighten like crazy. I tested at 100% brightness and it also dims and brightens. Obviously, I don't have it on auto brightness but it sure acts like it.
Anyone with the same issue? Is it a defect? I just got the phone today and I'm afraid to exchange it to have the same problem again. I really like this phone. There's always a friggin issue on a new phone. It's ridiculous.

neotoky said:
I have this weird brightness problem where I have it at 50% and it would randomly dim and brighten like crazy. I tested at 100% brightness and it also dims and brightens. Obviously, I don't have it on auto brightness but it sure acts like it.
Anyone with the same issue? Is it a defect? I just got the phone today and I'm afraid to exchange it to have the same problem again. I really like this phone. There's always a friggin issue on a new phone. It's ridiculous.
Click to expand...
Click to collapse
I think is a software problem. Lollipop still have lot to fix. Mines look the same. Can be a display minor isue. Not sure, but for me this phone doesn't have the best brighness at all. But I love this phone better than others for now. If you came from samsung phone, there is a big diferent in brightness. Post some screen shoot. One in a white background, and the other in a grey one. I will post the same and you tell me if something is diferent. Sorry for my grammar. Is not the best !!!!?
---------- Post added at 09:22 AM ---------- Previous post was at 09:20 AM ----------
jfernandezv said:
I think is a software problem. Lollipop still have lot to fix. Mines look the same. Can be a display minor isue. Not sure, but for me this phone doesn't have the best brighness at all. But I love this phone better than others for now. If you came from samsung phone, there is a big diferent in brightness. Post some screen shoot. One in a white background, and the other in a grey one. I will post the same and you tell me if something is diferent. Sorry for my grammar. Is not the best !!!!?
Click to expand...
Click to collapse
Do it at 50%....

neotoky said:
I have this weird brightness problem where I have it at 50% and it would randomly dim and brighten like crazy. I tested at 100% brightness and it also dims and brightens. Obviously, I don't have it on auto brightness but it sure acts like it.
Anyone with the same issue? Is it a defect? I just got the phone today and I'm afraid to exchange it to have the same problem again. I really like this phone. There's always a friggin issue on a new phone. It's ridiculous.
Click to expand...
Click to collapse
My screen shoot!!!

neotoky said:
I have this weird brightness problem where I have it at 50% and it would randomly dim and brighten like crazy. I tested at 100% brightness and it also dims and brightens. Obviously, I don't have it on auto brightness but it sure acts like it.
Anyone with the same issue? Is it a defect? I just got the phone today and I'm afraid to exchange it to have the same problem again. I really like this phone. There's always a friggin issue on a new phone. It's ridiculous.
Click to expand...
Click to collapse
In Q&A is a thred call DPI Change. Try that, but reed carfully. you'll need root for that.

I appreciate your input but I don't know how the things you mentioned would help me in my case. I would need to do a video in order to see the problem instead of screen shots. Dpi change will do nothing in this case as well. You may be confused with the issue I have.

Well I try my best. As I sed could be a software problem. DPI is a resolution thing, can help a little. Also you can link a video to see exactly what you talking about. The reson I ask for the screen shoot is becaus I can probably see a differences between your brightness and mines. Hope somebody can help you on that.

Sick of samsung's bad displays

So my display after being replaced 2 times in 6 months started flickering. My phone is very hard to be turned on because of the green flickering.
I just want to upgrade to a S6,S7 Edge or non edge. i just want to know if they have the save problem with displays ? I want to have a phone at least 2 years, can you recommand me a phone like that ?
I was just considering switching to a iPhone even though i prefer android on phones ... o how are S6,S7s displays ? Samsung still have the same problems?

Samsung improved a lot on screen quality in S6 and after, so you should be okay

Dieexe said:
Samsung improved a lot on screen quality in S6 and after, so you should be okay
Click to expand...
Click to collapse
So no more sudden flickering problem ? I mean i didnt even dropped the phone or something like that.

RootNightmareX said:
So my display after being replaced 2 times in 6 months started flickering. My phone is very hard to be turned on because of the green flickering.
I just want to upgrade to a S6,S7 Edge or non edge. i just want to know if they have the save problem with displays ? I want to have a phone at least 2 years, can you recommand me a phone like that ?
I was just considering switching to a iPhone even though i prefer android on phones ... o how are S6,S7s displays ? Samsung still have the same problems?
Click to expand...
Click to collapse
green flickering problem just for auto brightness problem (some custom Roms have this issues) if u will untick the auto brightness u will not have this problem

Not really, it has more issues on this "display green flickering " , on my S5 i dont get display on if the temperature around it getting cold .
Sent from my Samsung Galaxy S5 using XDA Labs

atakan1986 said:
Not really, it has more issues on this "display green flickering " , on my S5 i dont get display on if the temperature around it getting cold .
Sent from my Samsung Galaxy S5 using XDA Labs
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Click to collapse
Wow that's amazing. Been using samsung s5 exynos version for the last 1yr. Never had that kind of problem till date. And it have the same display as snapdragon version. And on comparison I found that this is by far the best display out there when compared to other brands.
Maybe perhaps you might be having a faulty unit from the begining.
Sent from my SM-G900H using Tapatalk

I have the same problem here with the display and it's not a software problem (same by original os 6 and same by cyanogenmod 14).
After the temperatures are under 10 C. i can't open my s5 with home button i must do it over the power button.

Using S5 for more than 28 months still I have not faced any issue. I just had to buy new charger apart from that not a single problem and yes I mess up with my phone so much but I still working and no display failure yet. And also I have dropped it many times, it still refuses to die.
You are just having a defective model or some internals of the phone are messed up. Because Samsh*t produces one of the best displays..

shurupi said:
I have the same problem here with the display and it's not a software problem (same by original os 6 and same by cyanogenmod 14).
After the temperatures are under 10 C. i can't open my s5 with home button i must do it over the power button.
Click to expand...
Click to collapse
So when its over 10C its ok ? Then i should sell the phone when its summer )

nikhil007.n2 said:
Using S5 for more than 28 months still I have not faced any issue. I just had to buy new charger apart from that not a single problem and yes I mess up with my phone so much but I still working and no display failure yet. And also I have dropped it many times, it still refuses to die.
You are just having a defective model or some internals of the phone are messed up. Because Samsh*t produces one of the best displays..
Click to expand...
Click to collapse
At least for s5, the internet is full of this faulty displays, even my friends have same problem.

RootNightmareX said:
So when its over 10C its ok ? Then i should sell the phone when its summer )
Click to expand...
Click to collapse
Very simple but good idea my friend : )
Sent from my Samsung Galaxy S5 using XDA Labs

RootNightmareX said:
At least for s5, the internet is full of this faulty displays, even my friends have same problem.
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Click to collapse
This may be problem for Snapdragon variant then.

nikhil007.n2 said:
This may be problem for Snapdragon variant then.
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Click to collapse
Maybe thats a point, but shouldnt only the processor be different? I assume the display is.the same for both...

nikhil007.n2 said:
This may be problem for Snapdragon variant then.
Click to expand...
Click to collapse
Nope, Exynos variant have this same problem

Im also facing green flickering and blinking at low brightness.
Sent from mySM-G900F using Tapatalk

baseer_IF said:
Im also facing green flickering and blinking at low brightness.
Sent from mySM-G900F using Tapatalk
Click to expand...
Click to collapse
Its not a good sign. Try disabling your light sensor. Even then if you experience such a problem than it means that your flex cable that attaches the screen with the motherboard needs to be changed.
Sent from my SM-G900H using Tapatalk

redhotiron2004 said:
Its not a good sign. Try disabling your light sensor. Even then if you experience such a problem than it means that your flex cable that attaches the screen with the motherboard needs to be changed.
Sent from my SM-G900H using Tapatalk
Click to expand...
Click to collapse
I try to disable Auto brightness. but in manual the problem is persist when when brightness is full low .
if brightness is normal it is normal
Sent from my SM-N9300 using Tapatalk

RootNightmareX said:
At least for s5, the internet is full of this faulty displays, even my friends have same problem.
Click to expand...
Click to collapse
Hi,
Yes and expect the same problems with the following generations. It's an amoled screen thing. The green colour happen when there's a colour displayed on the screen for a very long time (for example, I have a green on my screen of the size of my keyboard).
I think a solution to this problem is to set the display to turn off after 30s (it saves battery too) and maybe, if you're using a custom keyboard, change the colour from time to time. Use the brightness of the screen to a lowest which would still be comfortable to you (and auto unticked).
This last tip alone is enough to prevent greening. My flickering happened after an incredible fall (it had a tempered glass so the screen was safe). The flickering showed green what it had in memory.
Samsung has a 2-year guarantee for its products so you shouldn't worry for that period of time. Problem not solved, replacement.
Best of luck

Superlion721 said:
Hi,
Yes and expect the same problems with the following generations. It's an amoled screen thing. The green colour happen when there's a colour displayed on the screen for a very long time (for example, I have a green on my screen of the size of my keyboard).
I think a solution to this problem is to set the display to turn off after 30s (it saves battery too) and maybe, if you're using a custom keyboard, change the colour from time to time. Use the brightness of the screen to a lowest which would still be comfortable to you (and auto unticked).
This last tip alone is enough to prevent greening. My flickering happened after an incredible fall (it had a tempered glass so the screen was safe). The flickering showed green what it had in memory.
Samsung has a 2-year guarantee for its products so you shouldn't worry for that period of time. Problem not solved, replacement.
Best of luck
Click to expand...
Click to collapse
The funny thing is i already did "by mistake" all the tips you said and still have this. Never dropped the phone though. This problems seems very big though, i expected a burn in to be the biggest problem, but to have flickering at a level that i cant turn on the phone. I wanted recently to switch to a Nexus 6p, but knowing that it uses Amoled too, its a bad ideea. So the only "solution" is to switch to IPS screens? (btw i want a phone that holds on for at least 3 years)

In my research thus far, the AMOLED screen technology is to blame. When the display circuits get old or damaged, they don't sustain current at low power settings. In LED screens, a back light controls brightness, but AMOLED screens send current to each pixel for brightness control. If the circuit is damaged, or any corrosion has built up inside, this could attenuate the current below the point required to sustain light flow. I see this problem with some LED and CFL lights on motion sensor switches. Just enough current goes through the motion sensor to keep it's circuits active, and that current causes a flicker in the light.
With the screen though, since the problem is only resolved when you increase the brightness just a bit above minimum, it seems anything that lowers the display power (auto brightness for example) will cause it to flicker if this setting gets too low. I also noticed that before the screen locks on timer, it dims to low power for a few seconds and flickers as a result. There are apps that attempt to resolve this by putting a translucent black screen over your desktop and apps. This keeps the power up on the pixels but adds a black overlay, kind of like a screen filter. You can adjust the darkness if you need it to save your eyes when reading in the dark but it doesn't help save power any. They also require a rooted device, which could void warranties. The reason for this I believe is because apps are supposed to operate in a way they don't intrude on each other, and a filter that lays over your screen does in fact alter the output of your display rendering. With the added security concerns of these apps possibly collecting screen shots and sending them to another site, I would avoid this. Best to use a physical screen overlay you can put on or remove as needed as long as it doesn't interfere with your touch screen options.
Ultimately, these devices were meant for replacement every 2 to 3 years so if you're like me and you like to make your investment last, best thing to do is apply any work around you can come up with. A repair shop may be able to wipe the circuit boards down with a solution that clears away corrosion, but it won't repair any weakened pixels. I'm still using a Samsung S5 G900F
- And i finally got this fixed. it sounds like the reason for this is that since the latest update your phone cannot decide whether to use hardware or software back light settings. I managed to make the problem go away by doing this:
Go to settings >> system >> About device.
Find "Build number" and click 6 times fast on it.
You will then get the message saying: "You are now a developer"
and then go back to Settings >> system >> Now you will see the "Developer Options"
Now go to Developer options >> Drawing Section or Rendering Section >> Find "Turn off hardware overlays" or "disable hardware overlays" >> This will force the phone to always use GPU for screen adjustments. no more flickering.
but If I turn the brightness ALL the way down, it still flickers like crazy, however, if that's the only time it'll do it, I consider that a win.
Read More :good:

S20 FE Amoled screen is not truly black [issue]

I noticed at bedtime that this phone's panel didn't get those deep blacks we come to expect from samsung panels, i remeber in 2012 i had the same issue with my galaxy S2, i can see the black being lit like it was an LCD panel.
black image 0% brightness at 60hz = i can clearly see the display back-light.
black image 0% brightness at 120hz = it behaves like an amoled panel should, i can't see a thing.
The phone is running the latest software, oneui 3.1 + May patch.
Is this a known software bug? I think i'll return this phone because of this.

There is no backlight in a AMOLED display.
Firmware or hardware issue.
Or your eyes.

blackhawk said:
There is no backlight in a AMOLED display.
Firmware or hardware issue.
Or your eyes.
Click to expand...
Click to collapse
Definitely not my eyes unfortunately.

Try clearing the system cache
Try a hard reboot
Doesn't it have variable display frequency depending on what you're viewing ie static picture vs scrolling?
Could that be coming into play?
A glitch. You can't clear the graphic driver data but maybe the apk that controls the variable rate if separate from that.
You haven't done any major firmware upgrades, right?
I haven't play with the higher refresh rate displays, pretty much love my 10+/Pie.
Otherwise...
If you're within your return window, do so.

blackhawk said:
Try clearing the system cache
Try a hard reboot
Doesn't it have variable display frequency depending on what you're viewing ie static picture vs scrolling?
Could that be coming into play?
A glitch. You can't clear the graphic driver data but maybe the apk that controls the variable rate if separate from that.
You haven't done any major firmware upgrades, right?
I haven't play with the higher refresh rate displays, pretty much love my 10+/Pie.
Otherwise...
If you're within your return window, do so.
Click to expand...
Click to collapse
phone came already running latest software, i got it 3 days ago.

either you bought some cheap a$$ black market fakes or its some software fu*k up in the brightness department.

sivasankarpnair1998 said:
either you bought some cheap a$$ black market fakes or its some software fu*k up in the brightness department.
Click to expand...
Click to collapse
big retail store.
maybe some calibration issue? however someone tested on his device and had pitch black on both refresh rate so i think thats a faulty panel.

williamtavares said:
big retail store.
maybe some calibration issue? however someone tested on his device and had pitch black on both refresh rate so i think thats a faulty panel.
Click to expand...
Click to collapse
I've not personally used an S20 FE , but am a samsung user myself.
it should be pitch black.
are you sure the picture was absolute black and not slightly gray ?
if it was an absolute black image , the screen should not emit no light at all irrespective of what brightness you put it in , since it is black.

sivasankarpnair1998 said:
I've not personally used an S20 FE , but am a samsung user myself.
it should be pitch black.
are you sure the picture was absolute black and not slightly gray ?
if it was an absolute black image , the screen should not emit no light at all irrespective of what brightness you put it in , since it is black.
Click to expand...
Click to collapse
yeah i used different sources for this, including some apps.
i had many amoled display phones before, this was my first samsung phone since the s2 i had in 2012, bummer.

williamtavares said:
yeah i used different sources for this, including some apps.
i had many amoled display phones before, this was my first samsung phone since the s2 i had in 2012, bummer.
Click to expand...
Click to collapse
You're within your return window. Do it tomorrow. It should be black as night.

I have the same issue. 120hz is black but 60hz is not.

sonof said:
I have the same issue. 120hz is black but 60hz is not.
Click to expand...
Click to collapse
This affects all units, but some users doesn't even know what we are talking about.
Tested in 3 different units, same results, all returned.

williamtavares said:
This affects all units, but some users doesn't even know what we are talking about.
Tested in 3 different models, same results.
Click to expand...
Click to collapse
Thanks. That's what I was thinking about. No need to send for replacement since the same is with all units. Not a big problem for me since I like to use 120hz even if it drains more battery.

I got the same issue. It seems to be a software issue, because it only happens in always on display. If I open a black image the screen comes completely black. Weird bug.

There is a setting for variable current verses pulse modulation for brightness, I can't recall what they call it. Try using the variable current setting.

ivan290 said:
I got the same issue. It seems to be a software issue, because it only happens in always on display. If I open a black image the screen comes completely black. Weird bug.
Click to expand...
Click to collapse
Try to turn off Auto brightness in AOD settings, that fixed it for me.

froki said:
Try to turn off Auto brightness in AOD settings, that fixed it for me.
Click to expand...
Click to collapse
I have auto brightness in AOD disabled (and the normal auto brightness too) but the bug is still there. I configured it to max brightness so I notice it a little less

I am using the samsung galaxy A 52s 5g.
It has the exact same issue, the AOD and lockscreen behave like a LCD panel with a yellowish tint when the refresh rate is set on 60Hz.
Though everything else is fine, other screens and apps.
If set at 120Hz then AOD and lockscreen behave normally.
I don't what this is.. maybe samsung did not optimise their 60Hz setting properly.

prc001 said:
I am using the samsung galaxy A 52s 5g.
It has the exact same issue, the AOD and lockscreen behave like a LCD panel with a yellowish tint when the refresh rate is set on 60Hz.
Though everything else is fine, other screens and apps.
If set at 120Hz then AOD and lockscreen behave normally.
I don't what this is.. maybe samsung did not optimise their 60Hz setting properly.
Click to expand...
Click to collapse
There are color calibration/display issues on all the variable rate AMOLED displays it seems to some degree.
Lol, set to 120hz and be happy.

Who the hell buy 120hz phone and using 60hz