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abought screen brightness

hey guys!
my display set to adaptive,and the auto brightness is off,and the level is full bright
but somtimes the screen verybright and good and sometimes after 1 or two minutes ,its become less brightness by itself ,then sudenlly bright again
is this normal ? can we fix this ?

Make sure your screen time out time isn't set to something like 15 seconds
Sent from my SM-N986U using Tapatalk

AeroSatan said:
Make sure your screen time out time isn't set to something like 15 seconds
Sent from my SM-N986U using Tapatalk
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no its set to 1 min but thx.
but i know everybody got this iisue its like the aouto brightness set to on but its off

bubu23 said:
no its set to 1 min but thx.
but i know everybody got this iisue its like the aouto brightness set to on but its off
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So you're saying your auto brightness is off and you have it manually cranked all the way up but the issue is that it randomly dims and then gets bright again, on and off constantly?
Sent from my SM-N986U using Tapatalk

AeroSatan said:
So you're saying your auto brightness is off and you have it manually cranked all the way up but the issue is that it randomly dims and then gets bright again, on and off constantly?
Sent from my SM-N986U using Tapatalk
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Sounds like a display problem.
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racingmatt1 said:
Sounds like a display problem.
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I concur
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AeroSatan said:
So you're saying your auto brightness is off and you have it manually cranked all the way up but the issue is that it randomly dims and then gets bright again, on and off constantly?
Sent from my SM-N986U using Tapatalk
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yes but not all the time after few min
i have in familly 3 note 20 ultra and all the same ,so cant be display problem. i know many people say that thing ,and some tell them its like this because thers kind of protection of the screen so it wont be max bright all the time so it will not burn the screen ,i just wanted to know if thers a way to leave it on max for all time

bubu23 said:
yes but not all the time after few min
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It's difficult for me to determine whether it's something intentionally done by the software to limit the screen brightness or a defect. If it's the latter and you can still exchange or at least attempt a warranty swap through a carrier, it maybe something to look worthwhile to look at.
Sent from my SM-N986U using Tapatalk

If you're saying that the Note 20 Ultra isn't as bright as previous Samsung phones I would concur!

I have an S10+ and Note 20 Ultra, and I don't know what brightness "problem" is people talking about. They're almost identical. You know that you can adjust brightness to your taste, even in auto, right? By default is dimmer because of energy saving stuff, but you can move the slider up...

I have a note 10+ I still daily, definitely dimmer than my n20u, but that sounds like software trying to adjust for some reason.
Samsung is buggy, will always be buggy I feel like.

coilbio said:
I have a note 10+ I still daily, definitely dimmer than my n20u, but that sounds like software trying to adjust for some reason.
Samsung is buggy, will always be buggy I feel like.
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look its same like iphone
if you use iphone about 5 min its become hote thenn the screen dim
i know its in note 20 ultra as well if you use the phone surf lets say facebook 5 min its become little hot and dim the screen (not much ,little bit) at least with the exinos chip

DavidMarmon said:
It is due to the auto brightness.
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no man auto brightness is off
try it out! if you in a dark place not alot of light even if the screen on full brightness it still will dim itself abit
but when you go no outside but to room with much more lite the screen will be more strong
its like the auto brightness even when off still doing somthing to keep the screen

It may be to protect your eyes or something but mine does this as well.
Auto Brightness - Off
Manually set brightness to highest point
Then if you go from a dim room to sunlight the screen will brighten up even with auto brightness off so you can see it under sunlight.

Anyone manage to get this issue resolved? When the phone get hot, the screen dim to the extend u cannot see clearly under the bright hot sun. Using Samsung superb chip. Really lots of issue with note 20 ultra. Samsung taking customer for granted now!

angka8 said:
Anyone manage to get this issue resolved? When the phone get hot, the screen dim to the extend u cannot see clearly under the bright hot sun. Using Samsung superb chip. Really lots of issue with note 20 ultra. Samsung taking customer for granted now!
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When the screen is too bright it heats up then dims? Sounds like well thought out safety process implemented by samsung for people like you. ?

Limeybastard said:
When the screen is too bright it heats up then dims? Sounds like well thought out safety process implemented by samsung for people like you. ?
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That is a big problem. I am just using Chrome and not playing games. Why would it heat up so freaking fast!

angka8 said:
That is a big problem. I am just using Chrome and not playing games. Why would it heat up so freaking fast!
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Chrome? I stopped using that resources hungry POS browser years ago. I advice you do the same.

Limeybastard said:
Chrome? I stopped using that resources hungry POS browser years ago. I advice you do the same.
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Works well on all my phones, but our individual experience with chrome doesn't add much to the fact that Samsung's software might be limiting the user experience, which it is, more so than other manufacturers.
After all, we should be the ones to dictate what we want to use for web browser or any other app and not have to change it because samsung has buggy software managing it's hardware. Other manufacturers have it down, imy currently loving my xperia mark 2 and the way it's optimized.

Display Issue on two Note 20 Ultra

I bought myself a Note 20 Ultra Snapdragon Version (Hong Kong Version). After around 2 weeks right we’re the proximity sensor is, a dark discoloration started to appear. It’s not super good visible, but still it was there. I tried to overlook it but couldn’t. So i started a repair/exchange process. After a huge war to get a perfect device the shop where i bought the mobile exchanged it with a new one. But again after 1 week this weird dark spot started to appear. Sometimes the splotch is faintly visible, sometimes he is very visible. Now i have payed 1300 Dollars but can’t have a perfect display. Anyone having the same issue?

From0toHero said:
I bought myself a Note 20 Ultra Snapdragon Version (Hong Kong Version). After around 2 weeks right we’re the proximity sensor is, a dark discoloration started to appear. It’s not super good visible, but still it was there. I tried to overlook it but couldn’t. So i started a repair/exchange process. After a huge war to get a perfect device the shop where i bought the mobile exchanged it with a new one. But again after 1 week this weird dark spot started to appear. Sometimes the splotch is faintly visible, sometimes he is very visible. Now i have payed 1300 Dollars but can’t have a perfect display. Anyone having the same issue?
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Click to collapse
Ask yourself , what rogue apps are you heavily using that cause this issue. These things normally occur during using VoIP apps on high brightness with screen left ON for long durations. Heat , bright screen and VoIP apps that use the proximity sensor continuously degrade it.
User KURDking posted about similar issues on this forum a month or so back.

Limeybastard said:
Ask yourself , what rogue apps are you heavily using that cause this issue. These things normally occur during using VoIP apps on high brightness with screen left ON for long durations. Heat , bright screen and VoIP apps that use the proximity sensor continuously degrade it.
User KURDking posted about similar issues on this forum a month or so back.
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First i use the mobile on very low brightness since i got it. Secondly i used nothing like the apps you described. So i can’t see how i caused this. And I’m not the only one. There are other cases with exactly the same issue. It’s a design flaw.

I forgot to mention that i carefully checked the battery temperature and cpu temperature all the time to avoid unnecessary strain on the display and the internals. But still after a short time on both mobiles the same issue.

From0toHero said:
I forgot to mention that i carefully checked the battery temperature and cpu temperature all the time to avoid unnecessary strain on the display and the internals. But still after a short time on both mobiles the same issue.
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So what app are you using that is using the sensor all the time with display on? Let me guess none.

Limeybastard said:
So what app are you using that is using the sensor all the time with display on? Let me guess none.
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Lol i own the mobile max 2 weeks. In this two weeks i watched videos. I used whatsapp for texting (maybe 2-3 phone calls). I used a video player to watch download videos, but i used nothing that would have left the display on for a long time with the proximity sensor working. I used the phone more for media, because i still own my iPhone 11 pro max for phone calls and alike. Hence i can’t explain why this is happening. I’m the first one who would say yeah i used the apps you mentioned on high brightness all the time, but that’s not the case.

Limeybastard said:
So what app are you using that is using the sensor all the time with display on? Let me guess none.
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Btw your sarcastic questions are unnecessary. If you think your clever and everyone else is a moron, nice for you. But the Note 20 Ultra is not my first mobile, and i know what to avoid, and what to do in most cases. But when i get the same issue two times in less than 2 weeks without doing anything maybe causing this, i think it’s ok to ask if anyone else is having the same issue.

From0toHero said:
Btw your sarcastic questions are unnecessary. If you think your clever and everyone else is a moron, nice for you. But the Note 20 Ultra is not my first mobile, and i know what to avoid, and what to do in most cases. But when i get the same issue two times in less than 2 weeks without doing anything maybe causing this, i think it’s ok to ask if anyone else is having the same issue.
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I can respond however I wish.
Now going back to your question, is the attached what you are talking about ?

Limeybastard said:
I can respond however I wish.
Now going back to your question, is the attached what you are talking about ?
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Oh gosh it’s not that severe. It’s much more faint. But still its there

From0toHero said:
Oh gosh it’s not that severe. It’s much more faint. But still its there
Click to expand...
Click to collapse
Here's the thread I was referring to from KURDking. Not sure it will help or not.
Screen Issue!
So the other day i got a call on viber (a calling app) and when you get a call the status bars not transparent so it was still black anyway after the phone call i noticed a black dark pixel on my status bar and it annoyed me it was on my home...
forum.xda-developers.com

Limeybastard said:
Here's the thread I was referring to from KURDking. Not sure it will help or not.
Screen Issue!
So the other day i got a call on viber (a calling app) and when you get a call the status bars not transparent so it was still black anyway after the phone call i noticed a black dark pixel on my status bar and it annoyed me it was on my home...
forum.xda-developers.com
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Click to collapse
Exactly this thread i found before. It’s exactly the same issue. And i was in contact with a other guy over Reddit who also exchanged 3 mobiles with the very sane issue.

Limeybastard said:
Here's the thread I was referring to from KURDking. Not sure it will help or not.
Screen Issue!
So the other day i got a call on viber (a calling app) and when you get a call the status bars not transparent so it was still black anyway after the phone call i noticed a black dark pixel on my status bar and it annoyed me it was on my home...
forum.xda-developers.com
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Click to collapse
Thank you for your constructive help

From0toHero said:
Thank you for your constructive help
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Click to collapse
No worries bubba. I hope you find an amicable solution soon.

Yeah every n20u has it. Some people just don't have the eyes to see it or choose not to / conditioned to ignore it.
I can see it on demand but I forgot it was even there till this thread. No way around it, it's a design flaw of this generation.
My n10+ isn't visible unless it's being used but what can we do, Nothing.

My US Note 20 Ultra has that as well. I didn't notice it for 3 months, then there it was. It is from the proximity sensor, and it's only visible in dark environments, and on days when I've had long calls. Other times, it's not visible at all and I'm guessing the sensor is under the screen and that the visible flashing causes it to slightly offset the AMOLED pixels. Every Note 20 Ultra I've seen also has image retention issue (not to the point of burn in) but high contrast images fade off the screen for about 5-10 seconds and this is only visible on gray backgrounds. Looking for a "perfect" one may be a waste of time.

Question How to fix pwm on this device?

It has pwm even on full brightness. I tried the pwmfree app https://forum.xda-developers.com/t/app-amoled-pwmfree.3898070/ but it still hasn't fixed the problem.
Doesn't it bother you? My eyes hurt while looking at the screen.

I've read a bit about it on the link you've provided. How did you know if our phones have it? I am quite interested in this!

You use the camera from another smartphone or another device to look at the screen of the a52. And you change the shutter speed or exposure in the camera until you will see the bars pulsating on the screen of the a52.

Oh well then it seems like most of my phones since 2015 or so have had that, and I've never really suffered from headaches from it, not that I've noticed.

You can't notice it consciously, but some people, including me, are affected by it. The thing is this could easily fixed by samsung, but they wont do it. Other companies have removed the pwm effects on their amoled screens.

dragon.. said:
You can't notice it consciously, but some people, including me, are affected by it. The thing is this could easily fixed by samsung, but they wont do it. Other companies have removed the pwm effects on their amoled screens.
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Damn that sucks, especially when you know its an easy fix from the OEM to implement.
One thing though, from what I've read off the PWM Free apk page, it uses a transparent black overlay and increases its opacity as you decrease brightness. If that's the case then you could use Twilight to acheive the same goal, right? Just max out the brightness and turn off auto brightness, then use Twilight as your brightness adjuster, turning the bluelight option down. Could that work?

The weird thing about the a52 is that it has pwm even on max brightness, so probably twilight wont work as well. I will try it later though. Same problem on the premium samsung range: https://eu.community.samsung.com/t5...been-addressed-on-the-s21-series/td-p/2641628

dragon.. said:
The weird thing about the a52 is that it has pwm even on max brightness, so probably twilight wont work as well. I will try it later though. Same problem on the premium samsung range: https://eu.community.samsung.com/t5...been-addressed-on-the-s21-series/td-p/2641628
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Yeah, it still flickers even at full brightness. Maybe setting it at 60hz could fix that? I'll try it later to see if that could work. My previous phone doesn't have that issue at full brightness, so I'll gauge the difference based on the difference between the two.

I use mine only on 60hz and it still flickers.

Yeah, I've tested it and there is a difference between 60hz and 90hz, but the flicker is still present.
Edit: I also re did the test on my old device, a J7 Pro, and it stops to flicker altogether at peak brightness. So yeah, this phone has very prominent PWM.

ashraftheboss said:
Edit: I also re did the test on my old device, a J7 Pro, and it stops to flicker altogether at peak brightness. So yeah, this phone has very prominent PWM.
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Yeah, that's why samsung should do something about it. Because we still have flickering at max brightness, we can't use other software to correct the issue.

dragon.. said:
The weird thing about the a52 is that it has pwm even on max brightness, ...
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Click to collapse
I suspect you didn't actually have the brightness set to maximum. This cannot be set manually, but is only set when the ambient brightness sensor (front camera) is illuminated by a very bright light - the sun, or a very bright flashlight. The brightness of the display is then visibly increased above the normal maximum.

Well, if the max brightness can't be controlled then it's not relevant. In this review https://www.notebookcheck.net/Samsu...ntly-more-affordable-without-5G.539956.0.html they tested the pwm on the display with an osciloscope and it shows that when you manually set the display at 100% brightness it still has pwm. This is one of the worst pwm out there, and a shame for samsung to do something like this.

is a shame unless samsung make a change in the firmaware the a52 is a pain in the eyes i need to sell mine now i cant play any video game unless i want a eyestrain

Pwm sensitive here.
Samsung A71 was OK pwm 240 hz.
Samsung 21fe was OK pwm 240 hz.
Samsung s6 edge was OK pwm 240hz
Mi 11 ultra not OK pwm 480hz. Not OK even with anti-flickering or pwm_free / oledsaver app. Mi 11 ultra has Samsung display E4.
I really don't understand. Maybe is the highs and Bottoms in the amplitudes.

Works well on my galaxy s8

ashraftheboss said:
I've read a bit about it on the link you've provided. How did you know if our phones have it? I am quite interested in this!
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Click to collapse
Hi. I realised the negative effects last year after a year of using amoled display on redmi note 10. It gave me headaches and also my eye power changed from 0.5 to 1.5 for both the eyes in just less than a year. I do 3 hours of use a day. That's how I learnt about PWM and the headache it gives to people.
edit - REDMI NOTE 10 died a week ago and I am searching for a phone which doesn't have PWM issue in it. For past 7 days I am using LCD screen and my eyes feels a lot better.

Question Adaptive refresh rate

The first day I had my GS22U I noticed what I thought was some sort of odd screen adjustments but thought it may be adaptive brightness learning my habits. As I've used the phone I was able to reliably replicate my issue. Anytime I'm using adaptive refresh rate and I'm using a text field I can see what appears to be very subtle gradient shifts or flickering both when I start typing and when I stop typing. This is especially noticable in Google chromes search bar, Facebook messenger and reddit text fields. If you use a camera to look at the display it almost appears as an old school crt monitor when you see it through a camera. I was able to replicate this issue on my wife's device as well and the issue can be resolved by lowering the refresh rate to 60hz.
Has anyone else noticed this issue, or would car to try to replicate the issue? It is extremely subtle and easiest to detect using a camera to record it. Is there anyway to lock my refresh rate to a higher frequency with root permission?

Update, I happened to scroll down and see the galaxy max hz app that allowed me control over the refresh rate and I noticed that certain frequency would create the aforementioned issue and certain frequencies wouldn't. It seems as if seeing the min to 60 and max to 120 has resolved my flicker issue. Edit: never mind. It seems that different frequencies or the changing of frequencies tends to make the issue worse.

i turned it off, phone is very laggy with it. my screen is flickering

Now it seems as if I'm having a hard time noticing it with my naked eye but it seems to be getting worse when I look at it through a camera. I'm wondering if I should trade this in as a defective device.

yourself88xbl said:
Now it seems as if I'm having a hard time noticing it with my naked eye but it seems to be getting worse when I look at it through a camera. I'm wondering if I should trade this in as a defective device.
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do you look at your phone through a camera often?

Lennyuk said:
do you look at your phone through a camera often?
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No but worried it's going to get worse and become even more noticable with the naked eye. I wouldn't have thought to look at it through a camera if I wasn't noticing something I noticed with my naked eye.

yourself88xbl said:
Update, I happened to scroll down and see the galaxy max hz app that allowed me control over the refresh rate and I noticed that certain frequency would create the aforementioned issue and certain frequencies wouldn't. It seems as if seeing the min to 60 and max to 120 has resolved my flicker issue. Edit: never mind. It seems that different frequencies or the changing of frequencies tends to make the issue worse.
Click to expand...
Click to collapse
Hey bro , did you fix that issue ??

Question Video Flickering at 60fps

Anyone else notice this? I did find a small thread on Samsung.com so not sure if its a hardware issue or if all of them have it. - https://us.community.samsung.com/t5...t-flickering-on-video-recordings/td-p/2209967
Seems to only do it at 60fps options 1080p60 and 4K60.
Except its just not flash light related or LED light related. It'll do it outside as well Highly annoying!

I tested it and don't have this issue.

Monipeev said:
I tested it and don't have this issue.
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Its not a 100% all the time issue. Its under certain lighting specific lighting conditons. Usually lower light for me

for low light always use auto fps. it was tested to show its actually better and brighter and clearer

chillsen said:
for low light always use auto fps. it was tested to show its actually better and brighter and clearer
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Last year on the 12 Pro Max Auto FPS ruined a video that couldnt be remade. It for some reason switched despite being in the bright outside, on top of that it recorded 24fps and made the clip choppy. Not saying samsung would do this but its not worth the risk keeping that enabled.
But the weird flickering has happened with it being bright outside as well

hyelton said:
Last year on the 12 Pro Max Auto FPS ruined a video that couldnt be remade. It for some reason switched despite being in the bright outside, on top of that it recorded 24fps and made the clip choppy. Not saying samsung would do this but its not worth the risk keeping that enabled.
But the weird flickering has happened with it being bright outside as well
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something doesn't seem to be syncing. i would say the flickering is due to hardware more than software. but yea i only switch on auto fps in low light and its been impressive. i forget where but there's a video of the s22u side by side and auto fps was much more preferable since it could slow down frames meaning it would be brighter with less artificial noise reduction

Looks like a PWM frequency issue depending on the brightness of the (flash LED).

Literally just made a thread about this. The exact same problem. Glad to see i'm not the only one, because I wasn't able to find any other person experiencing this. You can see my example videos here:
Is it normal that my camera flickers on videos when the lighting level changes ? Does it happen on you too ?
It's not happening because of the lamps above, it happens on natural lighting too. It happens when camera focuses to a new area where the lighting level is different. Is this a defect, or is it the same for everyone ? Here are 2 example videos...
forum.xda-developers.com
Hope it's not a hardware problem and they fix it with an update

I'm so happy to say that May update I just received (S908EXXU2AVDA) fixed this problem. Can you check if it's fixed for you too ? @hyelton I tried every specific condition that it flickered before and it doesn't flicker anymore, made me happy that it wasn't a hardware problem and they were aware of the issue.

wholelottared said:
I'm so happy to say that May update I just received (S908EXXU2AVDA) fixed this problem. Can you check if it's fixed for you too ? @hyelton I tried every specific condition that it flickered before and it doesn't flicker anymore, made me happy that it wasn't a hardware problem and they were aware of the issue.
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The US model doesn't have the update. I have the U/U1 model which we just got an update not long ago. So I'm sure it'll he awhile.
Glad it was fixed in an update!

hyelton said:
The US model doesn't have the update. I have the U/U1 model which we just got an update not long ago. So I'm sure it'll he awhile.
Glad it was fixed in an update!
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Alright, tell me when you receive the update and check please, you're the only one I can ask this since nobody else was realizing about this problem lol. Hope it gets fixed for you too!

wholelottared said:
Alright, tell me when you receive the update and check please, you're the only one I can ask this since nobody else was realizing about this problem lol. Hope it gets fixed for you too!
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I'll post here if it ever gets fixed. Yeah I'm sure it's just people don't notice it.
Example
I can hand my phone to my mom and set it to 60hz. And low power mode. She will think it's crazy fast and no lag. When it most certainly is not LOL
She does now find her old S10 slow after using a S21 FE the past few weeks.