Develop Bugs

Display Artefact/ghosting line on lowest brightness

I have a diagonal line that runs along the width of the display it runs at a slight angel, it can be only seen with the display set a its lowest setting and running a black image in a very dark room. I have taken the phone back to three (solihull) who after 3 goes of trying to see it are aware of the problem and acknowledged it. They checked their demo phone which didn't have the problem. They have contacted their Samsung rep who I am awaiting a call from.
Does anyone have a similar problem?

This is normal with AMOLED displays.

the thing is, my GS2 doesnt have this "problem" on the lowest screen brightness.
I compared them last night side by side and its very noticable on my Nexus
That said, i've already accepted the fact that everyone else has some variation of this "issue" but im more curious on what the Samsung rep has to say about it. I'm also curious if its more visible on some devices as opposed to others.
I put my brightness on a static settings so it doenst effect me much (I can see it a bit on dark grey backgrounds) but i'm just imagining people who use auto brightness cause there's NO way you can miss it on whites/greys

you must have a magic Galaxy S II then, because it is a known issue with AMOLED screens when running at low brightness.

ill try and take a picture tonight with my devices side by side
honestly, anyone would be able to spot it out if you saw them in person.
Either my GS2 doesnt have the issue, or its VERY hard to see. I took long hard looks because i was really debating if my Nexus was defective - if this is just how it is then im willing to accept it - i just want to make sure we're not part of some funky batch

i assume like this here
http://forum.xda-developers.com/showpost.php?p=19881421&postcount=87
And if you said they tested the demo units, thats also my observation. Some screens have it more than others (others being almost not visible) and some inbetween

oscillik said:
you must have a magic Galaxy S II then, because it is a known issue with AMOLED screens when running at low brightness.
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Click to collapse
It may be a known issue, but that doesn't mean it's acceptable. I've not experienced any issues like this on either of my Fascinates. I'd certainly return mine if there were any screen issues.

oscillik said:
This is normal with AMOLED displays.
Click to expand...
Click to collapse
I understand the artefacts you mean but this is a single bar about 3mm thick its not dead pixels like the three store suggested otherwise it wouldn't matter about the brightness it almost looks like something is pressing gently against the screen. I have tried to photograph it but my camera/me are not the best.

Thyrus said:
i assume like this here
http://forum.xda-developers.com/showpost.php?p=19881421&postcount=87
And if you said they tested the demo units, thats also my observation. Some screens have it more than others (others being almost not visible) and some inbetween
Click to expand...
Click to collapse
yeah its pretty much like that
it's like...grainy with weird colours. I wouldnt say i see any thick LINES, instead it reminds me of throwing paint on a wall and letting it slide down. I'll try and take a picture tonight with some high res camera so you guys can hopefully see what im talking about
unfortauntely its not so easy for me to get a return since im in canada and i bought mine through Handtec in the UK - im pretty sure RMA-ing is a huge hassle and wait, plus im not sure if i have to pay for the shipping

Thyrus said:
i assume like this here
http://forum.xda-developers.com/showpost.php?p=19881421&postcount=87
And if you said they tested the demo units, thats also my observation. Some screens have it more than others (others being almost not visible) and some inbetween
Click to expand...
Click to collapse
Its not like that on mine.

lol i took that pic with my G2x, its not as extreme as that in real life.

An OLED (organic light-emitting diode) is a light-emitting diode (LED) in which the emissive electroluminescent layer is a film of organic compounds which emit light in response to an electric current.
It;s Organic. Each row of organic pixels may have slightly different tolerances to voltage than the next, hence you get dark and lighter rows varying to different degrees on different screens.
By all means take a chance and see if a replacement is all the same tolerances with no darker or lighter lines or if it has lots of them and looks like a striped screen. I don't think its a "defect" as such, its just a "characteristic" of AMOLED. If they wanted Samsung could measure the tolerance of each OLED to a very accurate level and there would be no dark or light lines on any screen. It would be very expensive though, so they fall into a catagory of acceptable or not.
Thats just my opinion by the way.
edit: Im actual glad so many others are questioning this too. I feel less pedantic now. lol

mcgon1979 said:
By all means take a chance and see if a replacement is all the same tolerances with no darker or lighter lines or if it has lots of them and looks like a striped screen.
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Click to collapse
Bear in mind that any replacement you get may in fact have a worse screen. I was lucky when I got my replacement phone (replaced due to volume bug, nothing to do with the screen) and my screen was luckily better. You may not be so lucky.
mcgon1979 said:
I don't think its a "defect" as such, its just a "characteristic" of AMOLED.
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Click to collapse
Indeed

well i just got my nexus today and as expected noticed a small transparant line running down with screen with auto brightness / low brightness. So i turned it of and manualy set to around 55 60% defintly cant notice it now just bummer cant use auto brightness .... will have to see how battery holds out like this as i luv this phone

1.29 update and yellow tint

Reports have been floating around that the 1.29 update fixes the yellow tint and improves screen accuracy, can anybody confirm this with the yellow tin tint displays at all ???.

It may be just psychological but the white balance on my phone after the 1.29 update seems to have changed. Not that my screen was overly yellow, but there was a yellow tinge to the whites, now the whites seem real white, in fact even whiter than my new Toshiba laptop screen. Also the battery is holding up very well, easily getting a day of moderate use including gaming, so we will have to see if others confirm the same findings.

Radiognome said:
It may be just psychological but the white balance on my phone after the 1.29 update seems to have changed. Not that my screen was overly yellow, but there was a yellow tinge to the whites, now the whites seem real white, in fact even whiter than my new Toshiba laptop screen. Also the battery is holding up very well, easily getting a day of moderate use including gaming, so we will have to see if others confirm the same findings.
Click to expand...
Click to collapse
I appreciate your response, thanks a heap.
Anymore would be much appreciated ...

The user AH64-D posted the difference in facts because he measured the screen before and after with a colorimeter. You have to search the 1.29 update thread for this.
But i am a little worried about the update. What will happen to the devices which already have a really great white? Will this change too? Will the color adjustments only work with one of the panel vendors?

I found the post you were referring too.
AH64-D said:
The Screen is now better.
Here are some measurements on my european HOX with a colorimeter.
Max brightness with a white Background.
Shipped HOX
RGB in %
100 101 78
Temperature
5684
Brightness in cd/m²
370
HOX with 1.29.401.7
RGB in %
100 100 91
Temperature
6148
Brightness in cd/m²
362
HD2
RGB in %
97 101 95
Temperature
6390
Brightness in cd/m²
302
Click to expand...
Click to collapse
If this is true then that means the people with yellow screens would get a more white look and accurate color output and that the people with white would get a even more blue screen unless they somehow managed to filter out the screen types to avoid this misinterpretation.

most likely the warm screen was recalibrated, the colder screen has a different id so the changes should only appply to the warm one

That's why I'm really looking forward to this update. It was my only complaint about the phone.
Now that I know how the S3 looks, I'm all the more happy

DANOFDANGER said:
I found the post you were referring too.
If this is true then that means the people with yellow screens would get a more white look and accurate color output and that the people with white would get a even more blue screen unless they somehow managed to filter out the screen types to avoid this misinterpretation.
Click to expand...
Click to collapse
He ALSO said that he measured the 1.28 screen when the phone was brand new out of the box, NOT immediately before the upgrade. That's to say it could have changed over time as it 'settled' in. Just something to bear in mind.

ewok666 said:
He ALSO said that he measured the 1.28 screen when the phone was brand new out of the box, NOT immediately before the upgrade. That's to say it could have changed over time as it 'settled' in. Just something to bear in mind.
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Click to collapse
Is this 1.29 update software side so any rom based with this should have the tint fix if it does exist ??.

Questions for a second-hand XL

Hey guys, just bought a used 2XL off eBay. Everything seems as advertised but I had a couple questions. I'm coming from using an LG G7
1) the screen is a bit warm in hue, is this something normal after presumably 1 year of use?
2) does the Cam have the same features as on the 3 or is there a port I should download?
3) I haven't put my SIM into this. Any call issues or people? (I'm on Freedom in Canada and the phone was purchased from a seller in Canada)
4) anything else you might recommend or that I should be aware of coming from another Android phone?
Thanks for any replies!
Cheers

Not an owner yet, but I can say most phones screens can get warm because of the processor/battery at times. I would not worry about that. Also, you can check Kimovil or willmyphonework to see if it'll get full band support for Freedom. The only thing to be weary of from what I hear is the OLED burn in, which is a danger with any oled phone if you are careless

Are you comfortable with rooting your phone? If so you can put a custom kernel on the device and use a KCAL profile to cool the screens colors, that's what I do.
Sent from my Pixel 2 XL using XDA Labs

@Koray_: Wrong definition of "warm". In this case the OP is asking whether the overall color of the screen is reddish (warm) or bluish (cold).
@VCan25:
P2XL screens seem to vary greatly. After 1 year of use however this might be normal. The blue OLEDs fade more quickly than the red or green.
Top Shot is not available for the P2XL. TBH I haven't checked to see if the camera app ports have it, but Top Shot supposedly requires an AI upgrade that the P2XL doesn't have.
No call issues I am aware of.
The blue shift phenomenon widely reported on these devices is overblown. All OLED screens have blue shift to varying degrees. The screen itself on a new device is set with a color palette closer to the real world. This can be changed in the device settings to give the color palette a bit more punch, or you can set it so it looks a lot like a Samsung display. I personally use the natural color palette, the lowest setting. But people's tastes vary which is why Google added the settings in an early update to the firmware.

Strephon Alkhalikoi said:
@Koray_: Wrong definition of "warm". In this case the OP is asking whether the overall color of the screen is reddish (warm) or bluish (cold).
@VCan25:
P2XL screens seem to vary greatly. After 1 year of use however this might be normal. The blue OLEDs fade more quickly than the red or green.
Top Shot is not available for the P2XL. TBH I haven't checked to see if the camera app ports have it, but Top Shot supposedly requires an AI upgrade that the P2XL doesn't have.
No call issues I am aware of.
The blue shift phenomenon widely reported on these devices is overblown. All OLED screens have blue shift to varying degrees. The screen itself on a new device is set with a color palette closer to the real world. This can be changed in the device settings to give the color palette a bit more punch, or you can set it so it looks a lot like a Samsung display. I personally use the natural color palette, the lowest setting. But people's tastes vary which is why Google added the settings in an early update to the firmware.
Click to expand...
Click to collapse
Thanks for the detailed response! Been using it on and off for the day and it seems to verify your points. Actually I had tried a Pixel 3 before but call quality was terrible. Dropped calls and receivers couldn't hear me but had no issue today on the 2XL so that was a relief. I found the palette options and I guess it was set to a more saturated level which I didn't like but on natural it seems much better. And I was looking for Top Shot and Super Res Zoom, so I'll check out the ports to see what developers have been able to cook up. Photos have been great so far and I can see why people love the camera. The LG G7 was so saturated it lacked details on zooming in.

Green tint on dark background low brightness

Man I hate OLED lottery.
Does anyone else have this issue? It's something similar to this:
https://forum.xda-developers.com/oneplus-7t/help/green-tint-issue-oneplus-7t-t3986231
I'm debating if I should exchange it or just keep it, it's only noticeable at low brightness

vwite said:
Man I hate OLED lottery.
Does anyone else have this issue? It's something similar to this:
https://forum.xda-developers.com/oneplus-7t/help/green-tint-issue-oneplus-7t-t3986231
I'm debating if I should exchange it or just keep it, it's only noticeable at leow brightness
Click to expand...
Click to collapse
I have the same effect in original Youtube app. It is just a bad background gradient in the application. Don´t blame the phone....
When I open Messenger with black background and grey status bar at the top of the app in the same brightness level, there is no greenish effect.

I am also having uniformity issues. Very noticeable, unfortunately. As there are no 512GB Ultras available anyway ATM, O will just have to live with it for the moment. Maybe I get used to it...

buddy66 said:
I have the same effect in original Youtube app. It is just a bad background gradient in the application. Don´t blame the phone....
When I open Messenger with black background and grey status bar at the top of the app in the same brightness level, there is no greenish effect.
Click to expand...
Click to collapse
mm weird, I see it in every single app with dark grey background, even in settings (w/Dark mode on), the bleeding is a lot bigger from the top right corner.
EDIT: Just checked the messenger app (FB messenger) and background is completely black so most pixels are off except for the letters and gray search bar but bleeding wouldn't be noticeable.

vwite said:
mm weird, I see it in every single app with dark grey background, even in settings (w/Dark mode on), the bleeding is a lot bigger from the top right corner.
EDIT: Just checked the messenger app (FB messenger) and background is completely black so most pixels are off except for the letters and gray search bar but bleeding wouldn't be noticeable.
Click to expand...
Click to collapse
I've just checked it with Gmail since it is also a Google application and you can notice the bleed when the lights in the room are turned on and I try to cover the top of the phone to see it. After turning the lights off, whole app is equally gray so in my opinion it is just an optical illusion. If I recall well the AMOLED displays use some kind of dimming (tinkering with the frequency) in order to reach a lower point of the brightness that is not noticeable for human eye. Probably this can be seen when covering a gray part of Google apps in a room that has another not so bright light source.

buddy66 said:
I've just checked it with Gmail since it is also a Google application and you can notice the bleed when the lights in the room are turned on and I try to cover the top of the phone to see it. After turning the lights off, whole app is equally gray so in my opinion it is just an optical illusion. If I recall well the AMOLED displays use some kind of dimming (tinkering with the frequency) in order to reach a lower point of the brightness that is not noticeable for human eye. Probably this can be seen when covering a gray part of Google apps in a room that has another not so bright light source.
Click to expand...
Click to collapse
I made a picture. It is showing a 5% gray test pic and supposed to be uniform. It is easy to see and I was kind of shocked when instantly noticing it the first time I was using it in the dark. Settings and many parts of the dark one UI are using grays in that range.
Anybody else? If it is rare, it will be worth pushing for an exchange.

corwin_amber said:
I made a picture. It is showing a 5% gray test pic and supposed to be uniform. It is easy to see and I was kind of shocked when instantly noticing it the first time I was using it in the dark. Settings and many parts of the dark one UI are using grays in that range.
Anybody else? If it is rare, it will be worth pushing for an exchange.
Click to expand...
Click to collapse
I did the same test, I'm attaching a picture of my Note 10+ and the S20 Ultra side by side. Uniformity seems a lot better on the note 10+, however on white background the Note 10+ turns more red when I slightly tilt it while the S20 Ultra seems to shift colors a lot less and still white overall.
Still not sure if it's worth the hassle to return.

Ok, the fact, that it looks very much like mine can be good and bad ?
Could you please check, if is different at 60Hz? For me, it is clearly different.

corwin_amber said:
Ok, the fact, that it looks very much like mine can be good and bad
Could you please check, if is different at 60Hz? For me, it is clearly different.
Click to expand...
Click to collapse
Oh wow, you're right! I set it to 60 hz and QHD+ and uniformity on the gray test got noticeable better, still some green on top right corner and around the punch hole but noticeable less. I love reaaally 120 hz during normal use though.

Thanks for confirming, same here. I wonder, if this is something, that can be fixed in software... And if the rumoured 'dynamic refresh raze' update might change things.
Could please note people check their Ultras displays?

Same here with my s20 more visible at 12hz refresh rate with dark theme

Damn it, ok, then I really hope that it is fixable... Weird.
I am using smiled displays since Symbian Nokias, never had one, where I noticed it so much.

I remember all the Mate 20 Pros with LG screen had this issue buy way worse in some cases
https://www.google.com/search?q=mat...JtXpfSDsL9sQXomrbgDQ&rlz=1C1CHBF_enUS731US731
In some cases they were normal during the first days but the problem evolved until the display was unsusable in low light conditions, hope the same won't happen to our phone during the next weeks.

yeah I don`t have this issue I did the screen test in Gmail and download the app that does all the different colors including gray, at the lowest brightness and at other levels of brightness at 120hz its all uniform.

2003vstrom said:
yeah I don`t have this issue I did the screen test in Gmail and download the app that does all the different colors including gray, at the lowest brightness and at other levels of brightness at 120hz its all uniform.
Click to expand...
Click to collapse
Mine is most noticeable at around 35-40% brightness and with 120 hz but still noticeable with 60 hz while on the note 10+ I can't see any green at all at any level of brightness. I think it's a quality issue and variation of OLED screens but not sure if it would count as "defective". Samsung doesn't do exchanges so it would be a pain to return everything and recorder without the promotions and reservation/pre-order credits. Ugh not sure what to do yet.
EDIT: Btw I tested with gmail and didn't notice the green in the app since it's light gray but as soon as I drop down the notification panel (w/dark mode on) the green is immediately noticeable. It's only with very dark gray that lookd almost black which is what Samsung use for all their apps (settings, calculator, messages, etc.) when dark mode is on. I wish they used true black so pixels were completely off like with facebook messenger.

I am also unsure what to do. I have to say, however, that this is the device that gives me the most uncertainty ever. For this opportunity price I want a good to perfect display. @vwite Don't you think that the dark grays are too bright as well? It wouldn't be so visible otherwhise. I also sent my picture to the 'write the CEO' address and a pledge to be aware of the issue:
https://www.samsung.com/uk/info/contactus/email-the-ceo/ (example: UK)
I will try checking in a store, which will be totally hard because of the light there. Maybe I will just order another one... Or a plus ?

Made another picture 'for the CEO' :silly: and will also attach the source image I showed on screen. To replicate:
- 25% brightness
- Show 5% picture in a dark room
- made picture with an S10+ on full auto

corwin_amber said:
Made another picture 'for the CEO' :silly: and will also attach the source image I showed on screen. To replicate:
- 25% brightness
- Show 5% picture in a dark room
- made picture with an S10+ on full auto
Click to expand...
Click to collapse
Thanks! Please let me know what they say.

Actually I ordered an S20+ now and will most likely just give the Ultra back in the first 2 weeks. Yes, it is a pain, but I really can not stand the screen as is. I am even putting it in its box before I have the plus and using my S10+ in the meantime - the green tint is driving me a little nuts.
I am having a hard time justifying the thickness and weight for a feature I hardly use (amazing zoom) while having an inferior main camera at the same time (focus issues).

i noticed this issue too on my 20+
it seems to be worse some days less bad other days
it also is very dependable on how much ambient light is around - eg is much more noticeable in dark rooms
and yes is an issue with Samsung dark mode that isn't true black but some dark greyish
other then this - all other colours look amazing = so not sure if the screen itself is defective
I do hope there will be a software update that will fix this or make it less visible

Screen Problem

Hello, I've noticed that when I use my phone in night mode I can see green areas on the screen. Are there other people in my case?

No on mine so far. Black is black no greenish.

is see this too sometimes esp at night when its dark in the room with no other lights - in the day when its brighter is not visible
it does seem to be an issue with some backgrounds as i noticed in apps where the background is black (not dark grey or greysh) this isnt visible
so not sure whats going on - but i didnt had this issue with the s10 .....

tim2london said:
is see this too sometimes esp at night when its dark in the room with no other lights - in the day when its brighter is not visible
it does seem to be an issue with some backgrounds as i noticed in apps where the background is black (not dark grey or greysh) this isnt visible
so not sure whats going on - but i didnt had this issue with the s10 .....
Click to expand...
Click to collapse
Yes, I have the same problem, it comes from the screen according to what I read on some forums. Some OLED screen have problems. I think I'm going to get it exchanged.

no issues so far with mine s20+ (exynos variant), however if i were you i would seek to get replacement

slabs?

tim2london said:
slabs?
Click to expand...
Click to collapse
Screen sorry ^^

ok but how do you explain that its only visible sometimes and then sometimes is not?
and is only showing on grey backgrounds etc
like now i have the phone in my hand and is looking ok
the best place to test is in the samsung daily or SMS app - the top part of the app thats meant to be black was sometimes showing more like greyish - now is proper black again?
like i said it seems to be dependent on the ambient light - i wouldnt want to replace the phone if its not an actual issue esp since it took me a whole day to get my stuff transferred and setup

tim2london said:
ok but how do you explain that its only visible sometimes and then sometimes is not?
and is only showing on grey backgrounds etc
like now i have the phone in my hand and is looking ok
the best place to test is in the samsung daily or SMS app - the top part of the app thats meant to be black was sometimes showing more like greyish - now is proper black again?
like i said it seems to be dependent on the ambient light - i wouldnt want to replace the phone if its not an actual issue esp since it took me a whole day to get my stuff transferred and setup
Click to expand...
Click to collapse
Oled is known for reduced quality the lower brightness you go.
But all units will have varied levels of tints etc

In my case..

Unfortunately, yes. Also, it is more noticeable at 120Hz.
There is a thread about that in the Ultra section:
https://forum.xda-developers.com/galaxy-s20-ultra/help/green-tint-dark-background-low-t4065621
I also tried to get people with that problem in the S20+ section:
https://forum.xda-developers.com/galaxy-s20-plus/help/s20-ultra-oled-bad-uniformity-bright-t4067051
It is rather horrible and i noticed it right away the first time I used it in the dark. I think it can not really be fixed in Software, but it can be probably made less noticeable, as 120Hz is making it worse.
I wrote an 'email to the CEO' about that here:
https://www.samsung.com/uk/info/cont...email-the-ceo/ (example: UK)

If its same as below thread...Welcome to OLED!
Colour blending (blacks) problem
https://forum.xda-developers.com/galaxy-s9-plus/help/colour-blending-blacks-problem-t3765385
Had this on my S9+ and S10. Nothing can be done about it.

Using OLED since 2010. Starting with Symbian Nokias, Windows Phone Nokias and switching over with the S8+ - OLED only.
I suppose - never had a display that bad in this regard. At least never noticed it that bad right away. The upper right corner is almost always showing a green tint.
But I am glad, if it is not too widespread - then the S20+ I ordered will probably be fine.

in your case what?

Pardon me?

kaktus_78 said:
In my case..
Click to expand...
Click to collapse
corwin_amber said:
Pardon me?
Click to expand...
Click to collapse
sorry it was for an earlier post with a screenshot of a call in russian

Hi,
Just attached a picture of my screen with adaptive brightness with low light with screen at 120Hz.
At 60Hz the screen is even, at least almost even.
What is your opinion?
Thank you in advance.

Report it to Samsung, probably get it exchanged, if possible and it really bugs you.
I gave back the ultra because it was too much green tint. The plus has it as well, not as bad as the ultra.

no.one.writeme said:
Hi,
Just attached a picture of my screen with adaptive brightness with low light with screen at 120Hz.
At 60Hz the screen is even, at least almost even.
What is your opinion?
Thank you in advance.
Click to expand...
Click to collapse
Bottom right corner is way darker and reddish.

corwin_amber said:
Report it to Samsung, probably get it exchanged, if possible and it really bugs you.
I gave back the ultra because it was too much green tint. The plus has it as well, not as bad as the ultra.
Click to expand...
Click to collapse
Hi,
Return it and seller ordered another device to replace this one. Hope that the new device is ok
Best regards.