Develop Bugs

Screen streaking/unevenness?

I haven't seen this mentioned anywhere else. Does your ET show (mostly) vertical streaking/unevenness when displaying a solid, light color? Is this something related to AMOLED, or is my ET defective?
Edit: I just realized this is dependent on screen brightness...the streaks are only apparent at the lowest brightnesses.
Thanks.

Screenshots would help others see what you're referring to.
Sent on the run.

I get this when my screen goes off and on
Sent from my SPH-D710 using XDA App

I have to mention that the first one i had, was like this, but it showed like a dark spot in the center of the screen, btw screenshots wouldn't show this problem because is actually the hardware" Screen" In this case.
So i went ahead and brought it to the Sprint Store where i bought it from, and asked for a replacement due to the Screen hardware defect, they kept *****ing at me telling me, that they have to keep it for a whole day, to do "Tests" Im like... well its a hardware issue and i have taken the phone and hardreset it, making the phone as if just out of the box, and showed them the problem again"btw the phone comes with a Gray and Green pure colored background images that you can show to them, that it isn't an Image that you had Altered" , and they can see that it is the screen, and its what i showed to them, and thats when i got my replacement, When i got this one, i saw it again, and it had a white spot... also had various streaks coming from the Top of the screen, went int he second day and got me another replacement, but before i left the store, i stayed about 30 minutes in there, testing the phone out, and downloading all the apps that i had in the phone before. Also Good way to notice this problems( defects ) is dimming the screen all the way, and changing the background to gray, which is a default wallpaper.
This screen didn't have any of the defects that previous ones had, so im a happy camper .
So now what i'd recomend if you can, is replacing/exchanging the phone until you get one with a decent screen.

I get this too when my brightness is turned down. It's most visible on grays. Like the background of the market. It only appears when the brightness is turned down low. There is also this app in the market called "screen test" which cycles through different solid and colored backgrounds. that if you did take it in you could show them that. This issue doesnt really bother me but I have TEP plus there is a one year manufactures warranty so if it gets worse I'm not worried about it.

I finally got around to taking a quick set of comparison pictures. Sorry for the poor quality, I took them quickly with my phone. I also tried to purposely take them out of focus, so moire patterns from the actual pixel grid wouldn't confuse things. I have a feeling this is how all *LED based displays are.
I use the app "Colors" to quickly get a solid patch of color. I encourage a few people to download it, and browse through a few colors (grayish or dark tones - light or bright colors aren't affected as much) and see if they have it. "Grr-ey", "Mighty Slate", "Kind Giant" are good ones to test with.
Things are much more noticeable when the brightness is set low.
Brightness manually set to minimum:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Brightness manually set to maximum (streaks almost entirely gone):

ranchosteve said:
I get this when my screen goes off and on
Sent from my SPH-D710 using XDA App
Click to expand...
Click to collapse
same, i get white vertical streaks at times when i turn the phone on / off..
i exchanged the phone for another one, same issue, less frequent tho

ffolkes said:
I have a feeling this is how all *LED based displays are.
Click to expand...
Click to collapse
You may be right my screen has the same effect :-(
Sent from my Galaxy SII using XDA App.

[Q] Would this qualify as defective?

My screen shows banding on screens with gradients, like the call log screen, or screens with certain colors, like when I'm playing wordfeud. Even when I'm browsing the white background has faint horizontal and vertical lines.
All of this is only visible when on the lowest brightness setting. So when I'm browsing in bed at night etc it's really annoying.
I went to the (3) store here in denmark, but because it was a well lit room, the problem was barely visible and they said they'd have to send it in for "assesment", and best if i could come back in January and send it in (for 2-3 weeks). I'm just afraid they'll just return it with "problem not found"
I DID manage to report the problem to them on the 14th day after i bought it, their own DOA limit, but I've got a feeling I'm going to get screwed. Especially because the in store phone ALSO seemed to show the same color banding on the call log background.
I've tried taking some pictures that maximize the problem here: http://imgur.com/a/CbKYi#9
Are you guys seeing the same thing on any of your devices?
I love the phone to death otherwise, but it's like a scratch on a brand new car, it's annoying me a LOT.

unfortunately, that's just how they all are. has to do with the display type. both of the nexus' i've had were the same way, as was the display unit in my local verizon store.

vman81 said:
Even when I'm browsing the white background has faint horizontal and vertical lines.
All of this is only visible when on the lowest brightness setting. So when I'm browsing in bed at night etc it's really annoying.
Click to expand...
Click to collapse
You aren't seeing "banding" in the traditional screwed up screen sense, you're seeing the back of the display. I think it's just part of being SAMOLED and Pentile. I never noticed it until I started reading all the threads about people complaining over "banding" (and I don't think you're complaining LOL ).
Bump it up from the dimmest setting just a bit and most of it will go away. Our dimmest setting is REALLY good, at least compared to my old SGS. I also like how are screens don't have that SGS SAMOLED blue tint to them.

KWKSLVR said:
You aren't seeing "banding" in the traditional screwed up screen sense, you're seeing the back of the display. I think it's just part of being SAMOLED and Pentile. I never noticed it until I started reading all the threads about people complaining over "banding" (and I don't think you're complaining LOL ).
Click to expand...
Click to collapse
This image clearly shows banding and not the grainy display BG:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

go to that call log screen again and press vol down + power. then look at the screen shot on the computer.
it looks the same
the background is ment to look like that

All 4 phones and 7 models that I've gotten to use from Samsung have this problem.
SAMOLED just isn't very good yet.
Sent from my SGH-I897

happy to hear my phone is not defective, but then again im very disappointed that this is a quality issue with the phone.
I read tons off aritcles discussing the difference between Super AMOLED and Super AMOLED plus (pentile and RGB) and this forum probably did the best job of explaining it
now is this also the reason why whites arent really white while having hte phone in auto brighntess? is the screen is dim, my "people" app is not white, actually far from it. but when the brightness is maxed out it looks magnificent

danibravo said:
happy to hear my phone is not defective, but then again im very disappointed that this is a quality issue with the phone.
I read tons off aritcles discussing the difference between Super AMOLED and Super AMOLED plus (pentile and RGB) and this forum probably did the best job of explaining it
now is this also the reason why whites arent really white while having hte phone in auto brighntess? is the screen is dim, my "people" app is not white, actually far from it. but when the brightness is maxed out it looks magnificent
Click to expand...
Click to collapse
I was disappointed by the screen quality at first too, but the more I use the phone the less I notice it. I've even started to really like other aspects of the display that were lacking in other phones with a "clean" screen. Colors are much more vibrant for one, this is very visible when watching videos on the phone when I'm at the gym.

DARK vs LIGHT Theme Battery Stats on SAMOLED

As most of us already know, Samsung's SAMOLED displays are more efficient than LED-backlit LCD displays (HTC One X, Moto Razor, etc), because backlit displays are always on even when showing a black image (no local dimming yet?), whereas AMOLED only uses energy when individual pixels actually need to emit light. What I didn't know until today, though, is precisely how much battery you could save with AMOLED by using dark-themes instead of bright light-themes & wallpapers, etc. I had assumed the difference was in the low single-digit percentage range, and I assumed wrong
I simply timed how long it took the battery to drain 5% with the screen always on at various brightness levels and while viewing an all white or all black 720p image fullscreen in QuickPic. All tests were performed on a freshly-rebooted AT&T SGS3 running CM10 Nightly (20120911) with a 2.5-month old stock battery. 4G, WiFi, & sync were enabled. No CPU hogs were running.
I used the following to log the phone's battery level every 10 seconds via adb over wireless. (If I were to do this over again, I'd instead spend a few hours writing a simple app to automate the process for hands-free accuracy, instead of doing it manually):
Code:
$ while true; do printf "%s\t%s\n" "$(adb shell dumpsys battery|grep level|awk '{print $2}')" "$(date)"; sleep 10; done
98 Mon Sep 11 15:59:30 EDT 2012
CONCLUSION:
In the best-case scenario, a SGS3 with its SAMOLED display showing dark content instead of light content gains about an extra 3 hours of screen-on battery time, no matter what your brightness is set to. A backlit LCD display would show no difference. So, in order to squeeze a couple more hours out of your battery, it's smart to use DARK wallpapers, DARK ROM themes, DARK App settings, and DARK-themed Google Apps (like JustinBean's Inverted GAPPS package :highfive: )
And here's a screenshot my spreadsheet just so you can see the data:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Experiment over. HTH.
Feel free to verify my results yourself...

zmore said:
As most of us already know, Samsung's SAMOLED displays are more efficient than LED-backlit LCD displays (HTC One X, Moto Razor, etc), because backlit displays are always on even when showing a black image (no local dimming yet?), whereas AMOLED only uses energy when individual pixels actually need to emit light. What I didn't know until today, though, is precisely how much battery you could save with AMOLED by using dark-themes instead of bright light-themes & wallpapers, etc.
Click to expand...
Click to collapse
Your first sentence I bolded is probably not true.
See:
http://www.anandtech.com/show/6022/samsung-galaxy-s-iii-review-att-and-tmobile-usa-variants/3 - One X with 4.7" LCD and smaller battery capacity lasts longer than Galaxy S III 4.8" SAMOLED with larger battery capacity in an internet test that is constrained by the power drain of the screens.

Milk Tea said:
Your first sentence I bolded is probably not true.
See:
http://www.anandtech.com/show/6022/samsung-galaxy-s-iii-review-att-and-tmobile-usa-variants/3 - One X with 4.7" LCD and smaller battery capacity lasts longer than Galaxy S III 4.8" SAMOLED with larger battery capacity in an internet test that is constrained by the power drain of the screens.
Click to expand...
Click to collapse
Here I was testing apples to apples by only changing ONE variable at a time on the same device, and not apples to oranges (different CPU & h/w components, different Android OS, amount of RAM, etc...).

Cool scientific research! Write a paper on it! Yay!
---------- Post added at 11:19 AM ---------- Previous post was at 11:17 AM ----------
Browser test should be done in dark Opera browser. There is usercss.css file available which makes Opera dark. Anandtech tests stock nonmodified phones - so it suxxx.

very interesting information.
i've used devices with lcd screen and the gs3 is my first amoled screen. my impression was that i noticed the display wasn't always the number 1 battery drainer on my old atrix like it is on my gs3. even though oled based screens don't use as much battery to display blacks, during average screen usage most apps use lighter colors apposed to darker colors so this really can't be taken to its full advantage. fortunately there are some apps that i use very often like tapatalk where you can apply a dark theme and save some juice.
mabey in the future as oled screens become more popular, mobile developers will take advantage of darker themes.

Nice I added this to my op
Sent from my SGH-I747 using Tapatalk 2

Thanks for the information...

Awesome post man. Makes total sense and nice to see data on this subject. Cheers!

Does the nougat update fix the youtube lip sync issue?

Also does nougat allow you to calibrate the color of the screen?

Yes it fixes the sync. No unfortunately no calibration of screen just the regular two modes. I also want color control as I want to make my screen a little cooler. We can just hope for a custom kernel in the future that allows this. ElementalX dev has stated he won't make anything for the P2.

dannejanne said:
Yes it fixes the sync. No unfortunately no calibration of screen just the regular two modes. I also want color control as I want to make my screen a little cooler. We can just hope for a custom kernel in the future that allows this. ElementalX dev has stated he won't make anything for the P2.
Click to expand...
Click to collapse
Good to know the YouTube issue is fixed. God damn it I ****ing hate amoled screen, my screen has an annoying yellow tint, I might want to return it

linkzex said:
Good to know the YouTube issue is fixed. God damn it I ****ing hate amoled screen, my screen has an annoying yellow tint, I might want to return it
Click to expand...
Click to collapse
If mine would had been just a tad warmer I would have thought about doing the same. But in "vibrance" mode it's good enough (barely). I can stand it as the eye gets a little used to it.
There are ways to make it a little cooler anyway. Check the app Screen Balance. It will mess with your blacks but not very much if you keep the opacity <50%. It's a tradeoff but it can help.

dannejanne said:
If mine would had been just a tad warmer I would have thought about doing the same. But in "vibrance" mode it's good enough (barely). I can stand it as the eye gets a little used to it.
There are ways to make it a little cooler anyway. Check Screen Balance. It will mess with your blacks but not very much if you keep the opacity <50%. It's a tradeoff but it can help.
Click to expand...
Click to collapse
Actually that's what I've been using, it makes the black looks like dark blue...
The screen just isn't that good, not sure why so many people jump on the amoled bandwagon
LCD is more color accurate, no risk of burn in, the white looks so much better and the quality of LCD is always consistent unlike amoled which varies everytime.

linkzex said:
Actually that's what I've been using, it makes the black looks like dark blue...
The screen just isn't that good, not sure why so many people jump on the amoled bandwagon
LCD is more color accurate, no risk of burn in, the white looks so much better and the quality of LCD is always consistent unlike amoled which varies everytime.
Click to expand...
Click to collapse
I completely agree with you on every point. I'm an LCD person too for the same reasons.
Though I have to say I'm happy overall with this screen because of one reason, it's the most uniform screen I've ever had including all LCD phones I've had and they are a lot. My screen is pretty much perfect i never get this lucky certainly not with Amoled.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my LG-H960 using Tapatalk

The sync issue is fixed and I don't have any problems with the screen. For many years everybody was loving the oversaturated amoled Samsung screens, but now there are opinions that some prefer lcd. Well it's a personal preference, lcd screens have bad black color and also drain more battery regardless what you're doing on your phone.

Question edge bleeding at low brightness

Hello, tonight i was configuring my youtube app and i noticed very bad colors at the edge of the display, when the background is grey. I was in a complete dark room, the problem is most noticable when brightness is about 15%. And no, its not only the app. The bad colors are visible at a brightness from 0% to 50%.
Do you guys also have this problem?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Cryptonizer said:
Hello, tonight i was configuring my youtube app and i noticed very bad colors at the edge of the display, when the background is grey. I was in a complete dark room, the problem is most noticable when brightness is about 15%. And no, its not only the app. The bad colors are visible at a brightness from 0% to 50%.
Do you guys also have this problem?
View attachment 5275759
Click to expand...
Click to collapse
The Mi 8 has it also, that is screen uniformity. It is hardware and it seems very common the last few years. I don't have it on my Oneplus 7 pro but it is also present on the Oneplus 8, Xiaomi Mi 9 etc.
Some folks say it is normal on oled but it isn't.
Why are the no problems with oled on Oneplus 7 pro, Samsung s10+?

I have same in low brightness don't worry.

basongwe said:
I have same in low brightness don't worry.
Click to expand...
Click to collapse
LOL, send the device back it is not normal. Don't pay for broken hardware.

bassbounce said:
LOL, send the device back it is not normal. Don't pay for broken hardware.
Click to expand...
Click to collapse
so your unit doesnt have this issue?

i have the same problem,always visible when you have a dark(not black) background,note i had before 1 samsung s2,s4,a5 (the a5 when i was watching a movie in dark scene i could see a yellow brightness in one corner,it was awfull)and a tablet from the same manufacturer and all had the same probleme but at different level,my last Mi9t was parfect and screen didnt show that but my new F3 has it ,one side is clearer than the other one

As far as I know it is because of the AMOLED manufacturing tolerances, it seems to be really hard to get a perfect uniform display.
It shows at low brightness with grey screen especially.
Discussion also happend with the Mi 8 here:
https://forum.xda-developers.com/t/...moled-uniformity-issues-etc-for-mi-8.3843180/

Lol, I was just about to start a topic about this when I saw yours. Only dark gray backgrounds and top left is brighter then bottom right. Disappears at about 25% brightness. On the photo it seems green but not to the eye...
So if I send the phone back I'll most likely receive a new one with the same issue?

PatricB said:
Lol, I was just about to start a topic about this when I saw yours. Only dark gray backgrounds and top left is brighter then bottom right. Disappears at about 25% brightness. On the photo it seems green but not to the eye...
So if I send the phone back I'll most likely receive a new one with the same issue?
Click to expand...
Click to collapse
you have a chance to get another F3 with same issue or less visible or worse

PatricB said:
Lol, I was just about to start a topic about this when I saw yours. Only dark gray backgrounds and top left is brighter then bottom right. Disappears at about 25% brightness. On the photo it seems green but not to the eye...
So if I send the phone back I'll most likely receive a new one with the same issue?
Click to expand...
Click to collapse
Lol, as u can see, my issue is in the same area, but mirrored.
I think, if u send the phone back, maybe u will get one with the same issue on diffrent corners. Only if u r lucky, u will get a good screen but then maybe the vibration motor starts crackling xD
I will keep my phone, cuz everything is fine for now

Well, yes, I'm a nitpicker really and there's always a small problem with a device it seems. I can't find anything else so I guess I'll settle for a small uniformaty of the screen. After all it's only with gray and in a dark surrounding. When watching a dark scene in a movie in inperceptable and maybe I can switch more elements to black using a custom rom (hope lineageOS will show up).
And maybe when there's a way to do DC dinning and not PWM it'll be better....

PatricB said:
Well, yes, I'm a nitpicker really and there's always a small problem with a device it seems. I can't find anything else so I guess I'll settle for a small uniformaty of the screen. After all it's only with gray and in a dark surrounding. When watching a dark scene in a movie in inperceptable and maybe I can switch more elements to black using a custom rom (hope lineageOS will show up).
And maybe when there's a way to do DC dinning and not PWM it'll be better....
Click to expand...
Click to collapse
It is in general really hard to get a perfect display, be it on phones or on PC monitors.
Also TN and IPS panels show their weaknesses at "grey" colors, it makes the uniformity visible to the human eye.
Additionally trails and overshoot of moving objects on a grey background are most noticeable.
Not sure why "grey" is so devastating

I don't know. I'm from NL and here we have a lot of "grey areas" so guess I'll have to get used to it

Mine has a similar grey gradient visible at low brightness and solid colors, but it doesn't seem to be discernible in anything but settings. My old phone has a "perfect" oled though, so it's definitely possible.

Solid colors seems fine, or my eyes don't perceive it...
Probably the same case as processor cores: bins. Maybe they pay less for getting screens that are not 100% uniform?