yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] Il_Tene:
I was on paranoid android, i flashed ak kernel and my Phone started to have sod and reboot without passing for the Google logo.

I dirty flashed pa again to come back to stock kernel, same reboot.

So i made a full wipe and flashed slim bean + ak kernel but the problem remains. Another full wipe and flashed only slim bean w/o a kernel. And again reboot.

I don't know What to do. The only thing is to flash stock image and root again but it's a bit annoying.

Someone has a better idea?
[Samsung Galaxy Nexus] moomingstarz:
Try using AK's kernel revert (back to stock kernel.)

It works for some people and for others, it doesn't though. I also had reboot problems with AK so I don't use it anymore, and also it sucks that I had to revert to stock when it happens. Hope it works for you, goodluck man.

4.2.2 - http://d-h.st/R7y

4.2.1 - http://d-h.st/2w6

From AK's thread
[Samsung Galaxy Nexus] Il_Tene:
I didn't use that "script" because i thaught it is needed only if you want to go back to stock kernel without reflashing the rom. If I reflash the rom the kernel will be overwritten, isn't it?

However now i'm no more with ak kernel so i don't think ak's kernel revert could do something.
[Samsung Galaxy Nexus] najaboy:
Yes. The kernel id's overwritten whenever you flash a rom.
[Galaxy S 4 Q&A, Help & Troubleshooting] AVF Jay:
Ok I picked up my new galaxy s4 today, I've owned all the galaxy s handsets and been pleased with them.

However I noticed some weird screen issue earlier, basically while scrolling dark greys on blacks smudge/smear purple.

A test for this is in settings, on anything grey if you slowly scroll up and down the grey bits go purple.

Does anyone's else phone suffer from this? I've never noticed this on previous phones, but not sure if my handset is faulty or whether it's just how the galaxy s4s are.

I know it sounds odd but I'd really appreciate if someone could test it for me, go to settings where the background is black and there are greyish bars, scroll up and down slowly and tell me if the grey bits have purple smearing/smudging.

Thanks

edit: I've added a picture and drew some arrows to point out what parts go purple/smudge when I scroll, this is just so you know what to look for. It isn't an image that shows my problem, it simply to point out what parts show the issue when I scroll

Thanks

Please report your HW Rev number at this thread and state if you do have teh smearing issue. You can do that by dialing *#12580*369# on your dialpad.
[Galaxy S 4 Q&A, Help & Troubleshooting] AMoosa:
Yes!!! Happens on mine too!!! :mad:
[Galaxy S 4 Q&A, Help & Troubleshooting] daisun:
Same thing here.
[Galaxy S 4 Q&A, Help & Troubleshooting] tuxonhtc:
So it's the issue with software right? I hope it's not intentional - given how retarded touchwiz design is, I wouldn't be shocked if it is.

Does it affect it somewhere else? Like videos or something? Or have you tried it in non stock apps? Say download poweramp, put a grey skin and try scrolling?
[Galaxy S 4 Q&A, Help & Troubleshooting] AVF Jay:
Thanks a lot for testing it.

Well it must just be the way it is.

I'm certain it didn't do it on the galaxy s3. I wonder if they're using a cheaper screen or something.

I was hoping it might be software related but I watched a youtube video with dark scenes and I could even see the smearing there :(

The more I think about it the more I'm convinced it's not a software thing, it just doesn't look right, and if you turn the brightness right down it looks even worse. And I mean really bad, honestly try turn the brightness right down and then do it. :(

I know some people might say "it's not a big deal" as I'm not going to spend all my time scrolling up and down in the settings menu lol, but that's just an easy test to show it. I can see smudging on dark colours in general, I'm really disappointed.
[Galaxy S 4 Q&A, Help & Troubleshooting] PLUG313:
can you make a video?

this is weird
[Galaxy S 4 Q&A, Help & Troubleshooting] AVF Jay:
I can't unfortunately as I don't have another phone or camera to video it with.
[Galaxy S 4 Q&A, Help & Troubleshooting] jbpf77:
Mine does this too. It's like the ghosting effects you get on cheap televisions with low refresh rates. Hope it's not a faulty screen, I'd imagine the wait for a replacement will be quite lengthy...
[Galaxy S 4 Q&A, Help & Troubleshooting] AVF Jay:
I went to a few stores to test demo units and they all do the same thing.

The s3 doesn't.

I wonder if they're just using a cheaper screen.
[Galaxy S 4 Q&A, Help & Troubleshooting] ste1164:
It may be the new pixel arrangement in the device. It makes whites look different colours if you look at the phone from an angle.
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
I too noticed this issue on my new SGS4 today and I´m glad I found a thread with people having the same issue. I also found another thread about the same issue: http://xdaforums.com/showthread.php?t=2253881
[Galaxy S 4 Q&A, Help & Troubleshooting] squshy 7:
I'm gonna guess it's probably due to "adapt display"..try going into display and change to movie mode
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
Tried it, but no matter which mode I choose, it doesn´t change anything about the problem.
[Galaxy S 4 Q&A, Help & Troubleshooting] Obagleyfreer:
Mine does it too. It's most noticeable for me scrolling through contacts, the grey bars with the letters on seem to shrink then grow with purple edges. Very weird!

UPDATE- Seems like it only happens in TouchWiz. I have Rom Toolbox which has grey bars on dark background and it doesn't happen.
[Galaxy S 4 Q&A, Help & Troubleshooting] JustSueMe:
Static I have no issues with display but scrolling in stock apps I get purple according to direct I scroll byt tge colour stays within its border. Tbh I have no issue with that, kinda seems like a theme lol
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
Samsung should fix this fast via software update, this is emberassing for a 700$ phone.
[Galaxy S 4 Q&A, Help & Troubleshooting] PLUG313:
so it's for sure software related?

can anyone make a video so I can see what it's like?
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
I am pretty sure its the software, for the screen works perfectly when watching a vid of sth white moving on a black background. The smearing only occurs inside the os and apps. I can´t upload a vid of it atm, but I will as soon as I can.

Edit: I made a vid of it with my SGS2, the quality aint that good, but you can see the ghosting on the grey setting bars: /watch?v=iNwCuufJuLM&feature=youtu.be
[Galaxy S 4 Q&A, Help & Troubleshooting] bsch3r:
It does not smear in toolbox or video because the background is not absolutely black. I am pretty shure this is an inherent amoled problem. I guess its either no absolute black level like the s3 or smearing on s4.

It seams the pixels on s4 get turned off completely on black areas of the screen and react slowly when turned on again. On s3 the pixels are never completely turned off to probably avoid this artefact. Thats why s3 blackest black is deep gray.

---------- Post added at 01:17 PM ---------- Previous post was at 01:11 PM ----------

Titanium backup does smear... its not the software, unfortunately.
[Galaxy S 4 Q&A, Help & Troubleshooting] jinsiik:
i agree with you, i've tried scrolling a page with a black background with grey text, same thing happens, its got that purple hazy ghosting issue
[Galaxy S 4 Q&A, Help & Troubleshooting] simacca:
Although the note 2 does get some form of smearing as with all amoled displays, there is no colour change.
[Galaxy S 4 Q&A, Help & Troubleshooting] bouzoubaa:
Guys what version are you using. In the i9500 I m trying hard to reproduce the same thing but can't see any color distortion or change in the grays over blacks. Weird. Is it specific to i9505.
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
It's there in 9500 as well
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
Could you please post a video of it. It makes things easier for everyone :)
[Galaxy S 4 Q&A, Help & Troubleshooting] Mantis64:
I made some macro shots to try and pinpoint the problem.

I took one pic of the grey bar in the settings menu (My Device - Input and Control) while it was stationary, then again while scrolling up.

Brightness is on very low.

I took the pics with 1/80 shutter speed.

I hope someone can analyze it better, but to me it looks like the top line creates a gap with only blue pixels...

https://www.dropbox.com/sh/ldwxw6kazdq94jz/RDu53BmLZ5

I tried to make a video with my macro lens but the movement is too fast, it's just a pixel blur at 24fps...
[Galaxy S 4 Q&A, Help & Troubleshooting] Mittaa:
http://xdaforums.com/showpost.php?p=40826259&postcount=10 :good:
[Galaxy S 4 Q&A, Help & Troubleshooting] αкαѕнα:
ohh.. thank you all for the information... from what i can see after reading all the post in this tread its most likely the screen controller that’s not fast enough (pixel on/off) and it will most likely be fixed in an update or in a ROM...

My phone is ordered but not received yet so i can’t say what i personally feel about it....
[Galaxy S 4 Q&A, Help & Troubleshooting] tylose:
Pentile isn't necessarily crap. Galaxy S3 doesn't seem to have any serious issues. It's really shocking to see a disgusting display that is inferior to both S3 and Note 2. I wish they did a 720p display without issues instead of a 1080p display that is a piece of ****.
[Galaxy S 4 Q&A, Help & Troubleshooting] Orical:
If its a software issue I'm sure an update will soon follow officially after the device has been out a few weeks.
[Galaxy S 4 Q&A, Help & Troubleshooting] bob13bob:
so I just went to the store and reproduced it.The screen leads with purple shadow before the gray bar slides there. e.g., if you scroll the gray bars in the up direction, slighly above the bar will be a purple shadow. it is harder to see at max brightness.

Honestly, It doesn't make a difference to me. It only appears in menu settings, not to my eyes using the net browser. I will be spending very little time in the menus on this phone.
[Galaxy S 4 Q&A, Help & Troubleshooting] sebmw:
This kind of problems are usually from the screen an update will not fix it, I remember back when the first Galaxy SII came out everybody was reporting screen issues where you can see black ink spots/blotches when watching movies in a dark room, so the best is to wait for couple of months and see if they fixed the problem on the new shipments.
[Galaxy S 4 Q&A, Help & Troubleshooting] sam2c:
Can you please check whether a totally black screen in a dark room has a red tint to it as well?

I dont see smearing, but i got a red tint in black in a dark room. I have the ATT variant. I found something interesting while checking fir black clipping. Using the gamma charts on Supercurios Voodoo project site, I can se that the red hue chart is messed up in several ways. When the chart is being rendered, there are white outlines around the black numbers. They disappear in a second or so. Also boxes 20 and 21 are disproportionately whiter. There is something up with the red subpixels and its probably related to the smearing. I think Samsung tried to fix the smear but introduced redish blacks, or vice versa

People with and without the smear/ redish black, please check this out and report back. Download the bottom 4 files and view them full screen in gallery app:

http://dl.project-voodoo.org/screen-tests/
[Galaxy S 4 Q&A, Help & Troubleshooting] themissionimpossible:
Yes, I can confirm that when showing a completely black computer generated image I see a black screen with a very, very, very low reddish uniform background.

Maybe this thread is about the same findings:

http://xdaforums.com/showthread.php?t=2256651
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
I dont have the red issue, only the smearing. Could it be that everyone without the smearing has the red issue and vice versa?
[Galaxy S 4 Q&A, Help & Troubleshooting] sam2c:
Since you dont have a red blacks, Can you check out the bottom 4 files on this site and give us a subjective overview of what you see?

http://dl.project-voodoo.org/screen-tests/

See any big jumps in shading or weird artifacts while the image is being rendered, especially with the red hue gamma chart?

thanks
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
The weird artifacts and tearing is clearly there in gamma testing in display tester app.
[Galaxy S 4 Q&A, Help & Troubleshooting] simacca:
This problem still exists in nearly all amoled devices under certain conditions.
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
What I see when looking at the numbers on the coloured fields: Red and Blue numbers are ok, white ones have the purple edges when scrolling the page and green is an absolute catastrophe: the smearing/ghosting of the numbers on green is so strong, its like the pixels took 100 ms to react. This also supports my theory that the smearing is created by slow green pixels and fast red and blue ones, since red + blue = purple/violet.
[Galaxy S 4 Q&A, Help & Troubleshooting] sam2c:
ideally you should download the image and look at it full screen in the Gallery app. Im sorry, I should have mentioned that in my original post.
[Galaxy S 4 Q&A, Help & Troubleshooting] Hoggles:
I'm sorry if this has been mentioned before...

Other than brightness....does turning off all animations in Developer Settings do anything to help the smearing?
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
Not much of a difference, the pics are a bit blurry and some fields change their colour intensity until they are fully loaded (if thats what you mean by artifacts). Green goes down to 3, blue to 5, red to 7 and white to 3. White is blurry before being loaded fully, but doesnt change the colour of any field, while red, blue and green do both.
[Galaxy S 4 Q&A, Help & Troubleshooting] Nankov:
Sorry if this has been answered already but does anyone know if this issue is also present in the Canadian version i337? Or any of the US versions?

Edit: I just checked my SGS III scrolling in the Settings>About and i do see the small grey lines dim when i scroll up and down but they are not changing color just kind of dimming... Is this what everyone is talking about?
[Galaxy S 4 Q&A, Help & Troubleshooting] ilabs:
Currently, it seems to be present on all models and variants. When you scroll quickly up and down, the text does blur instead of staying clear.
[Galaxy S 4 Q&A, Help & Troubleshooting] Nankov:
I just tested my GS3 and the lines also go darker but i dont see any of the writing smudging or changing colors.
[Galaxy S 4 Q&A, Help & Troubleshooting] PolishDude:
I can confirm my USA T-Mobile version does it too
[Galaxy S 4 Q&A, Help & Troubleshooting] Nankov:
Can you say what exactly does it do? Does it change color or only dims?
[Galaxy S 4 Q&A, Help & Troubleshooting] v-b-n:
I think its just the screen design and hardware ...

The Samsung logo coming on and same logo in the Download mode show up on screen line by line from top to bottom ...

It feels that its not a style thing (my initial thoughts) but thats just how the screen switches on black pixel to show color and it may be damn slow in that respect ... :(
[Galaxy S 4 Q&A, Help & Troubleshooting] tuxonhtc:
+1. Pentile in S4 is not "crap", but RGB does look superior to my eyes. That said, S4 has superior brightness and outdoor visibility. Note II without perseus has black clipping too. It's some stupid thing Samsung does, for god knows what reason. Just like the green tint on white.

Andrei has confirmed the pink smear to be a software issue, so that's good news for all S4 users :)
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
Wanna hear some shocking news?

Made some full side by side comparison with 2 more s4's in a Samsung cafe here.

Case1

1.mine had smearing.

2.demo unit in cafe didn't had smearing

Case2

1.mine is pitch black in a completely dark room

2.demo unit has red pixels turned on in a completely dark room

Mine has a slight pinkish tint in 0 brightness(manual).

Demo unit didn't had pinkish tint on 0 brightness.

None of the unit seems to be perfect it seems , all units has either of the above symptoms. But it's clear it can be fixed via software. The question bugging me is if in case it's fixed via update will that bring the red pixels glowing issue instead of smearing ?

Damn....

Edit here are the pictures, left side is mine, right side is demi unit
[Galaxy S 4 Q&A, Help & Troubleshooting] Obagleyfreer:
[MENTION=3877923]bala_gamer[/MENTION]

Don't suppose you noticed if demo unit was running different firmware version to you?

If the 2 were different then it's obviously a software issue. If they were both the same firmware then it could be hardware.
[Galaxy S 4 Q&A, Help & Troubleshooting] bob13bob:
Don't see how u draw that conclusion. Maybe every.screen.is different and therefor os calibrated differently. Eg Those that have red may need it for colors to look right
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
Both running same firmware and same hw version, only the rf cal is different, mine is one day newer than the demo unit.(19.4.2013)
[Galaxy S 4 Q&A, Help & Troubleshooting] gypsy214:
I have read online about the S4 is made is South Korea, Here in the US T-Mobile is the only carrier that have the S4 made in China.

Also they changed the released date from May 1st to May 8th I wonder if T-Mobile noticed this issue too and they decided to get new

batch of phones and Samsung decided to make it in China. Just a thought
[Galaxy S 4 Q&A, Help & Troubleshooting] worrum:
So you are saying this definitely is a hardware issue? One guy reported he had it fixed by upgrading his firmware. I don't have the smearing, but I do have the red pixels in a black screen. I also have a lot of black clipping. I'm not sure of what to do, I might return it and get another one.

https://www.dropbox.com/s/yjw6jvasbvd9l32/CIMG1199.JPG
[Galaxy S 4 Q&A, Help & Troubleshooting] inolvidable:
If I returned mine I would ask for the money and keep an eye on the forum until we know for sure what's going on.

¡¡So say we all!! from my GT-I9505
[Galaxy S 4 Q&A, Help & Troubleshooting] daisun:
I did a test between my S3 and S4 ,when viewing a completely black picture in a dark room the S4's screen is completely off, the S3 is still illuminated. I then tested smearing which is almost imperceivable on the S3 but visible on the S4.

My guess is the same as someone else mentioned earlier, some of the sub pixels don't turn on fast enough. Hopefully the driver can be tweaked.
[Galaxy S 4 Q&A, Help & Troubleshooting] sam2c:
I've found that the black clipping might be fixable in software too. Check it out:

http://xdaforums.com/showthread.php?t=2259192
[Galaxy S 4 Q&A, Help & Troubleshooting] nadalzeal:
My #1 reason why I am buying s4 is because of the AMOLED screen that black, is black and it's 0 power consumption. I am about to receive my s4 on May 3 and I now starting to think of canceling the order and just get HTC One. Whew
[Galaxy S 4 Q&A, Help & Troubleshooting] daisun:
It is black, when viewing a black image its the same as having the screen off. TBH, the smearing isn't really that big an issue.
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
the black is full black in s4.. the best i have seen so far in amoled, but thats not the issue now, its the smearing people are concerned about ,some people can live with it but samsung shouldnt have done this blunder in a flagship device
[Galaxy S 4 Q&A, Help & Troubleshooting] inolvidable:
I could not bear the "red spotted" blackness since true black matters to me. Luckily my screen has pure black with purple/ghosting. I am worried though since that could change with the next firmware..

It would be a dirty move from Samsung if it was a hardware or non modifiable driver matter and next batches of screens were free of it without giving a free change option to all the affected ones

¡¡So say we all!! from my GT-I9505
[Galaxy S 4 Q&A, Help & Troubleshooting] Quasar83:
I have now e-mailed the website I ordered my S4 from and canceled my order :( I am not willing to take the chance of getting a faulty screen.
[Galaxy S 4 Q&A, Help & Troubleshooting] nadalzeal:
I will just wait for my s4 to arrive. As long as the screen has no dead pixels and can go black, as in BLACK, then I am good. Otherwise, I will switch to HTC One. :(
[Galaxy S 4 Q&A, Help & Troubleshooting] bouzoubaa:
Sorry guys. Tested all the four files but still don't get anything of what you re describing on my unit. No smearing and no pinky blacks here. Just pure blacks and no smearing over here.

Fingers crossed!!!!
[Galaxy S 4 Q&A, Help & Troubleshooting] _Variable:
Yo all

-.-.-.-.-.-.-.-.-

Sent from a dark and unknown place

Galaxy Tab 2 7.0 P3100
[Galaxy S 4 Q&A, Help & Troubleshooting] akrontomaz:
Guys, I'm just watching all this fuss about the S4, people canceling pre-orders because some people say X, other say Y, other say screen is smearing, screen has a red dot (pixel), he phone gets hot, touchwiz lag etc.

Man is not possible to have a perfect phone, for me is working great, receive my emails, nice apps, browsing well. OK maybe touchwiz hangs a little bit in the "morning", its OK.

The idea is people seems to want to kill them self's because of a phone, I can enjoy life even with a non perfect S4. :)

Peace for Humanity :good:
[Galaxy S 4 Q&A, Help & Troubleshooting] topcat07:
Mine arrives today how can I test the screen to let you know results in best possible way?
[Galaxy S 4 Q&A, Help & Troubleshooting] Quasar83:
When you are buying such an expensive phone mainly because of the screen, you want everything to be ok with it.
[Galaxy S 4 Q&A, Help & Troubleshooting] akrontomaz:
Ok I'm not discussing that, I just wish people to be happy with their new S4.

Peace bro :good:
[Galaxy S 4 Q&A, Help & Troubleshooting] themissionimpossible:
It may be of no significance at all, but my S4 is behaving just like the demo unit you tested, and moreover my RF CAL is curiously 2013.04.19.

Maybe RF CAL is the matter somehow!
[Galaxy S 4 Q&A, Help & Troubleshooting] Mittaa:
No screen is perfect and IMO S4 Amoled Screen is the best :good:

Went to a second shop today in order to review the "problem".

Yes there is some smear in some occasions and it might be a bit more than S3, but only if you focus on it you will see it. In daily usage this wouldn't be an issue for me at all :)

When my i9505 arrives I'ill try it out and only return it if it's different/worse from what I have been seen in the shops.
[Galaxy S 4 Q&A, Help & Troubleshooting] bala_gamer:
Where this smearing will bug us more is during the night reading or using it in a dark environment, people know about apps like screen filter. So during nights setting brightness to 0 and using screen filter makes this issue so bad
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
The easiest way to test if your S4 has smearing, is to open this http://dl.project-voodoo.org/screen-tests/near-black-green.png in your browser, zoom in, and move around. If you have smearing, the numbers will show it.

If you want to test if you have red instead of true black, go into a dark room and pull down the status bar. If its a bit red and not completely black, you have the red issue.
[Galaxy S 4 Q&A, Help & Troubleshooting] Mittaa:
You might be right.

I tested on low brightness but in a light room...
[Galaxy S 4 Q&A, Help & Troubleshooting] worrum:
Guys I'm totally bummed out: Samsung allowed me to swap the phone. My red pixel problem is gone, but you guessed it right... now i have the smearing problem which i didnt have with the red screen.
[Galaxy S 4 Q&A, Help & Troubleshooting] Quasar83:
Anyone with Nordic phones who also have this problem?
[Galaxy S 4 Q&A, Help & Troubleshooting] simacca:
So basically there are two different batches of screens made by the same company. Very strange.
[Galaxy S 4 Q&A, Help & Troubleshooting] DanteSSS333:
I wouldnt be sure about this, since sb reported earlier that his issue switched after performing a software update. It seems like Samsung tried to fix one problem and created a different one by doing so.