yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] BarryH_GEG:
We're all just thinking out loud so there's really no right or wrong. Someone using KG1 posted pics of the LCD screen test to show that there was no color biasing on the left side. Since (on most phones) the yellow banding only appears on the left, to counteract it with software, there would have to be some sort of left color/temperature bias introduced. That's why I'm guessing the overall color temperature has a definite impact on the banding and color temperature can be changed by software. It would be fantastic if all along there was a wonky driver that was causing the screen to display incorrectly on the left side. If it's something as simple as that, a new driver and a new kernel would be able to fix it. It'll be fun when everybody gets on the release version of 2.3.4 to what display differences we notice. I'll take some before and after pics of my phone using identical conditions to see if I or anyone else can notice a difference.
[Galaxy S II General] Seabass1:
One thing I forgot to mention, was that the yellow left side was initially present after flashing KG1, turning the screen off then back on made the problem go away, no reboot or power off just literally screen off then on. To me that just makes the whole thing make even less sense but maybe someone will know why that would be the case.
[Galaxy S II General] xakarix84:
So it's not the screen itself having the problem, also weird that software can cause yellowish left.

is there a chance cause by any chip temperature laying under left screen? because sgs2 is too thin and maybe KG1 did tune the chip to run lower or cooler? just guess
[Galaxy S II General] mach0boi:
@barry

It is visible to me. Just look at the leftmost bottom side of the 1st and 2nd picture and compare the grey colors.
[Galaxy S II General] BarryH_GEG:
I know. I posted it for Earl. I think he wanted to see the comparison to his phone. Even looking at it in the dark with the naked eye it's still hard to see. It shows up in pics though.
[Galaxy S II General] EarlZ:
Thanks, your yellow tint has about the same coverage as mine, Maybe im just more sensitive to it but its great that KG1 alleviates this issue.
[Galaxy S II General] jlevy73:
But that's so minor I literally had to stare at it for a bit to really notice the tint. If that's the worst of the SGS2's issues we got it pretty good IMO :)
[Galaxy S II General] mach0boi:
No, there are units worse than that..
[Galaxy S II General] jlevy73:
Yeah I failed to realize this thread is 160 pages so I assume there are those that have it worse off.
[Galaxy S II General] mach0boi:
Im also assuming that units who have lesser tinting issue just uses a kg1 kernel to alleviates it without knowing it
[Galaxy S II General] jlevy73:
Yeah, I'm using KG1 kernel and hardly notice any tinting. Have you tried KG2 to see how it looks? Just curious
[Galaxy S II General] mach0boi:
Havent tested it yet, maybe will flash it after chainfire release cf-root kg2.
[Galaxy S II General] BarryH_GEG:
I'm on the KE7 ROM with the KF3 kernel.
[Galaxy S II General] mach0boi:
I envy you :p
[Galaxy S II General] sachilleas:
KG1 is the only kernel tha lessens the issue ?
[Galaxy S II General] gtda:
Seems better on kg1, I can hardly see it on the lowest brightness setting.
[Galaxy S II General] sachilleas:
So... KG1 fixes the yellow tint , KG2 fixes the pink spot ... i think it's a matter of choice which of these two someone prefers !

Is there a fix for both of these problems ?? :)
[Galaxy S II General] DrSlump76:
I'm waiting september for some news about the display issue and the camera issue. If the firmware will not address the problems i'll bring the phone to a samsung repair center.
[Galaxy S II General] gtda:
I never said it fixes it, only that its less noticeable
[Galaxy S II General] evox84:
I think the Cyano solves these problems...
[Galaxy S II General] briko78:
Hey,

hope it's not a stupid question, but what do you mean by 'Cyano'? :o

Bye

briko
[Galaxy S II General] lynxboy:
+1 on KG1 solving my tint! Didn't have it half as bad as some of the pictures in this thread but glad it has gone nonetheless.

Regards.
[Galaxy S II General] EarlZ:
This means they already have the source code for KG1?
[Galaxy S II General] ram3n:
I find the yellow tint is more visible in KG2 (with ROM light'ning 3.0) than KG1 !! WTF ?

anyone has this same "issue" ?
[Galaxy S II General] sachilleas:
I'm sorry in advance for the noob question . Can i use KG1 (or every other kernel) with whichever ROM i like ? Or there are some limitations ?
[Galaxy S II General] BarryH_GEG:
If each dev is playing with the color temperature in their ROM, then each ROM could be warmer or cooler depending on the dev's choice of settings. If Samsung's official releases are now pushing blue to counteract yellow, than those of us that had cooler screens to begin with are going to start to notice a stronger blue tint. Since the problem is most likely hardware (they all come out of the box with the exact same s/w), trying to counteract it with software is going to make some happy and others that might have been happy not. I guess we'll see when the official XEU release comes out.
[Galaxy S II General] ram3n:
Back to KG1 kernel CF : yellow tint has gone.
[Galaxy S II General] sachilleas:
KG1 no yellow tint or at least a little bit ! Does cyanogen use the same colour temperature which eliminates the yellow left side ?
[Galaxy S II General] robydue:
Hello, I am sorry to reopen the "displaygate", but today

I uploaded a gray screen from the gallery in full screen

and unfortunately I noticed that the top of the display,

usually occupied by the notification bar,shows burn-in

alarm caused by the persistence of the icons, battery time etc..

a similar effect to that of plasma with stationary images for

long time in the same position.

The phone has only 15 days old

You can also do a test on your own?

I attach a screen shot gray

....

and photographed the results, although not in the picture

looks very good ..

.....

I tried it on my Nexus one year and used an AMOLED screen

and 'perfect yet .. Plus the super AMOLED seems too

delicate and imprecise ..

thanks

Roby
[Galaxy S II General] bruflot:
Noticed that with mine to. If I let the keyboard be shown for 15 sec and drag down the notification bar, I can still see the lines/shape of the keyboard Button.
[Galaxy S II General] BarryH_GEG:
Are you talking about artifacts and ghosting? If so, in a previous thread, it was attributed to app incompatibility. Sorry, I don't remember the thread. Do a search.
[Galaxy S II General] EarlZ:
Is it just me or latest 2.3.4 KG2 release makes the left side even more darker compared to KG1?
[Galaxy S II General] robydue:
Ghosting, image impressed in notify bar position when you show a screen all gray (but also other solid colors) but at low brightness.
[Galaxy S II General] EarlZ:
I initially said that I got a solid black screen but after a close and extended inspection I do see the horizontal lines, viewing the same all solid black wallpaper on the gallery or even setting it up in the home screen does not show any red lines.

Can anyone else test this properly, you need total darkness to actually see this and a solid all black lockscreen wallpaper, I believe this is a SW issue and its present in 2.3.3 and 2.3.4

Post your finding guys.
[Galaxy S II General] mrcatini:
Guys,

I'm with my SGS2 by 3 days and i realized that he have some vertical lines on the screen. I can see these lines at lower brightness.. I looked some photos here and some devices appears to have the same "problem".

Anyone else have this? It's easily to see in the market, on the green portion.
[Galaxy S II General] djase:
i have these lines too !

it sucks !!
[Galaxy S II General] mrcatini:
Woah.. anyone else?

It's normal?
[Galaxy S II General] robydue:
mee too!

these lines are not visible in display with cold colors

Ther're 2 types of displays, first more warm, white=yellowish

another tending to blue
[Galaxy S II General] BarryH_GEG:
No lines. Black background, dark room, different brightness settings (down to zero). Are those with lines stock or flashed? I'm stock on KF3. And don't snap at me for saying this, but why are you guys spending so much time trying to find things that you wouldn't notice if you weren't digging for them? The phone's been out over two months and until the last couple of posts no one's mentioned lines (except some QC issues but those you can see no matter what's on the display).
[Galaxy S II General] mrcatini:
Flashed with stock firmware (to remove carrier branded firmware).

On black background, no lines too. The most visible is in gray backgrounds, like in bottom of energy buttons in notification bar.

I'm not digging things.. I realized this lines and then start search, just now i heard about the yellowish problem (that's doesn't bother me)..
[Galaxy S II General] nomnompie:
I can see the lines they are talking about (not red lines on a black background, more like, bands of the screen that vary in brightness a bit, in fact, black background would be impossible to see these lines on). However, I suspect this is indeed an effect of the manufacturing process with SAMOLED + but I can't see the lines unless I look for them.. I suppose they could be kind of bothersome on a mono-colored background or something, but they don't bother me like the yellowing did.
[Galaxy S II General] BarryH_GEG:
Is there a way to take a pic of it? I'm curious to see what it looks like.
[Galaxy S II General] EarlZ:
I believe this is just sa SW issue as when you start to drag the lock screen the lines stick to the lock screen, some sort of compression bug i think. I noticed this with the stock rom that came with my phone which is KF1, this is also noitceable in KG1 and 2.

Imagine it as a very very faint beam of red light/bars thats horizontal. I tried taking a picture of it but its so faint that my camera cant pick it up. bit its noticeable if you have an all black lockscreen which led me to see the issue properly compared to when I was testing for it before.

This is only in the LOCK screen, having a black wallpaper on the home screen or viewing an all black image on the gallery does not show the lines. So yeah, SW bug.
[Galaxy S II General] BarryH_GEG:
Samsung should hire you as head of quality control. ;)
[Galaxy S II General] mrcatini:
h--p://imageshack.us/photo/my-images/801/20072011437.jpg/

h--p://images/hack.us/photo/my-images/69/20072011439.jpg/

h--p://imageshack.us/photo/my-images/39/20072011441.jpg/

They doesn't look nice, but it's what i coud shoot..

I entered in the h--p://fiddle.jshell.net/qFxsC/1/show/ and take the pics.

See the vertical lines, a little bit clearer than gray? You can easily see on the phone, in the pics it's a little harsh..
[Galaxy S II General] sachilleas:
Same lines here guys....
[Galaxy S II General] BarryH_GEG:
Wow, that's pretty noticeable. Has it been that way since you got the phone or did it appear when you started using different ROMs? I'd guess though as noticeable as it is if more of us had it we'd have heard by now. I'd also guess because of the number of screenshots posted trying to show the banding using a grey background it would have been seen in those too. Does it show on any of the LCD screen test pages?
[Galaxy S II General] sachilleas:
I'm afraid it's not a software issue (although i hope it is) because these lines are visible using both KE2 and KG1 ROMS. You can't see them in any of the LCD screen test pages. They are visible in the dropdown list and in any grey background (like sms messages background).
[Galaxy S II General] mrcatini:
I put the Ligtn'ing ROM and the lines still there.. i think that's a hardware issue.

Tomorrow i'm going to my brand store check out if others SGS2 have the same issue, or it's just mine.
[Galaxy S II General] djpianz:
No...Samsung should hire me first...because I'm the one who found the lockscreen bug first...haha, just joking.:D

BTW, after installing stock KG1 firmware, what I can say is that the yellowish tint on the left side was basically gone. For the horizontal faint red stripes on the lockscreen (when using solid black image), I just change my lockscreen to another picture...I think it's still there but It won't matter much to me because I'm quite confident that it is a software problem.
[Galaxy S II General] EarlZ:
+1 to you!

Yeah its there on all units, its a software problem, some ppl cant see it. A friend of mine came over ( he lives just across the street ) he cant see the red lines on mine or on his phone.
[Galaxy S II General] robydue:
Displays with no problems seem to be those with dominant cold, with white to blue.

Those with yellow cast who all have the problem! more 'or less...
[Galaxy S II General] sachilleas:
Does cyanogenmod lessen the yellow tint issue like KG1 ??
[Galaxy S II General] EarlZ:
Actually it has nothing to do with the color temperatures or severe yellow tinting on the screen because when you move the lock screen the red lines move along with the image as if its actually part of the image. SW glitch all phones are affected not everyone can tell. Initially I thought I never had it till I did proper inspection.
[Galaxy S II General] beppez82:
Nope it have the yellow tint and bis worse than any other sams kernel in my opinion... Kg1 is the only one that remove it... Btw with cm7 no banding colour

Sent from my Cognitive SGS2 with CF KG1 kernel
[Galaxy S II General] EarlZ:
Can you take a picture of that no color banding in CM7 ?
[Galaxy S II General] borgermeister:
My first S2 had this yellow tint on the left side of the screen. Got a DOA swap. Should never had done that, the second S2 I got has both the yellow tint issue AND a bright circle appearing in my top right corner of the screen. I would say the circle is the worst, because that one is visible nearly at every level of brightness AND color.

The phone is otherwise great, but I can't help being disappointed with Samsung for acting like they've never heard of it (when they have actually heard it twice, just from me!).
[Galaxy S II General] EarlZ:
Get another replacement, it still falls under DOA.
[Galaxy S II General] borgermeister:
They told me to remember the next time I returned the phone it would not be a DOA swap, but treated as a standard warranty issue.

But I'm not sure what to do,

From what I've seen, every super amoled+ display has extreme individual differences, making it hard to compare images when they are of one phone's screen at a time. My new S2 is a lot darker and with much higher contrast than my first.

A friend of mine got his S2 from the same store as me, at the same time (prob from the exact same batch), and his screen is less affected than the two I've had (though he has these bright horizontal AND vertical lines some people have mentioned further up in the thread).

All three of the phones mentioned here have been running the exact same firmware, and all were compared under the same conditions running on the same settings.

I think this is clearly a hardware fault. One that Samsung probably never will acknowledge.
[Galaxy S II General] EarlZ:
Thats a pretty shoddy policy, they must be aware that the SGS2 has a high return rate for making such claims.

On the store where I got my phone they also have a single return specific for the SGS2 only regardless of what defect there is found, other stores dont have this though and process it promptly instead of putting the burden on customers.
[Galaxy S II General] beppez82:
No I can't.

I'm back to stock now, I don't want to wipe all again ;)

Btw also MIUI don't have the banding.

Sent from my Cognitive SGS2 with CF KG1 kernel
[Galaxy S II General] sachilleas:
I suppose i will stay with KG1 forever then ! Even when ice cream sandwich arrives ! :)
[Galaxy S II General] beppez82:
I think that when sams will release the source the devs can look better at the kg1 and patch all other kernels.

In my little opinion is related with the colour temperature, like someone already posted.

With icecream sandwich I think we will have more yellow tint banding due to the cream :D jk

Sent from my Cognitive SGS2 with CF KG1 kernel
[Galaxy S II General] borgermeister:
Samsung support

After speaking with samsung support several times it is SO clear that each operator has been told to avoid questions about Samsung's awareness to this subject.

After some hesitating the samsung support employee always denies having heard of anything like this before.

To all of you who has noticed either yellow tinting, the strange circle or the horizontal/vertical bright stripes, I would recommend you to demand a swap/repair. If it isn't so bad that it's bothering your, then leave it like it is.

Because, you just might get a phone/display that's way more affected than the one you already had. Just like me.

I was allowed one swap, but when I went to complain about my second phone, I was told there was nothing else to do other than sending the phone to a service point to have the phone "fixed".
[Galaxy S II General] robydue:
I have had several confirmations that displays tending toblue

does not have problems. Gray image are perfectly displayed

try this test too, and tell me how many squares can

see

Thanks!

h--p://VVV.lagom.nl/lcd-test/black.php

my result compared with nexus one amoled

h--p://imageshack.us/photo/my-images/405/dscn6830av.jpg/
[Galaxy S II General] BarryH_GEG:
3MM phones have been sold. We on this forum have no idea what percentage have been effected. If it's less than 5% (150,000 phones), an acceptable defect rate in electronics, then Samsung support is just telling you what they know; there isn't a widespread issue. I doubt it's some big conspiracy. Looking at the number of posts in the SGS2 forum vs. the number of posts in this thread, it represents 3% of the SGS2 audience. If a large number of phones were defective, or the left side yellow banding bothered more people, that wouldn't be the case.

Again, there's two separate issues:

1) The left side banding which is the topic of this thread.

2) QC issues which can include:

a) Variances in color temperature (warm/yellow seems to exaggerate the left side banding)

b) Suction cup circles on the inside of the display

c) Fingerprints on the inside of the display

d) Dead pixels

e) Blotches

f) Vertical or horizontal lines

There's other random stuff like artifacting but so far that seems to be due to app conflicts on individual phones. There's also a 16bit vs. 24bit color display thread but that only has 16 pages. The QC issues suck, but again, we don't know what percentage of phones are effected or if the issues are random (EG: one display out of every 10,000) or come in batches (EG: every phone in a batch of 10,000). If its the latter, and you and your friends are exchanging at the same store, it makes sense that each phone would be effected. The display is the most visible part of the phone and in the SGS2's case a big selling point. If more than a small percentage had bad displays this would be a much bigger topic.
[Galaxy S II General] BarryH_GEG:
I can clearly see 17 and faintly see the other three.
[Galaxy S II General] BarryH_GEG:
Which is the SGS2? Mine looks like the one on the left.
[Galaxy S II General] mbevc1:
Did not see this problem ...
[Galaxy S II General] Metalucifer:
Hi guys, just got my S2 yesterday and suddenly realize in dark room a strange light on the left side of the screen, even if i turn off the s2, this issue continues...only become completly black when I remove battery.Wonder if this is the same yellowish problem!

Help!
[Galaxy S II General] EarlZ:
This is a totally different yet funny issue if its even for real!
[Galaxy S II General] BarryH_GEG:
The left side banding, on most phones, is only visible on a grey background, with the display at 20% brightness, in a dark room, and potentially only by taking a pic of it. I can't tell from your description what you're seeing.
[Galaxy S II General] EarlZ:
The last 20+ phones I've seen tells me a different story.

The band is more obvious with grey colors and on whites ( provided that the entire image is NOT white ), menu boxes with white colors also show its effect. No specific brightness requirements but 90% makes the issue invisible due to the sheer brightness of the screen. No dark room required.

Then again, a lot of people use under 20% brightness and a lot of people also use their phones at night time or in a dark place.

Your comments on the issue is somewhat erratic, I've read some of your responses explaining the issue well and it clearly points to a case to case basis for each phones but some of your responses are also biased towards defending the issue that only special requirements need to be met in order for this issue to be visible. Nothing against you but you need to give it a rest since your NOT affected by the issue, theres really nothing much to contribute on the thread and I dont mean this in a hostile way.
[Galaxy S II General] robydue:
Unfortunately, my galaxy is one on the right!

I bet that your display tends to blue!
[Galaxy S II General] BarryH_GEG:
Neither of us can say what the majority of phones are experiencing. A sample size of 20 out of 3MM isn't statistically relevant. Based on logic and statistics (% of people participating in this thread, number of posts about QC, 3MM phones sold), I believe the vast majority of phones are more like mine than what you've seen. There's also personal expectations which again, neither yours or mine can be declared representative of the universe of users. I don't dismiss the issue but I don't scream like a tree monkey about it either. I've posted pics, even some at your request, so people can make their own determination. This issue bothers the crap out of some people and others are happily oblivious. Let's let everyone decide for themselves.
[Galaxy S II General] BarryH_GEG:
Wow. Mine is cool/blue. The difference between the phones in your pic are shocking. How warm/yellow does your display look doing every day stuff?
[Galaxy S II General] EarlZ:
Neither of us can say its a majority but thats what you just said, on your earlier posts.

With XXKG1 and XXKG2, the issue is not bothering me anymore, Just waiting for a dev to look at the source codes and determine what sammy has done to alleviate this issue, maybe they can even out both sides.

Are those displaying the same image? Theres like a massive difference between both..
[Galaxy S II General] Sp1tfire:
Subjective much ? You need the special requirements on some phones. If you can't agree that the yellow tint is less or more visible from one phone to another, then this whole thread is pointless if all you understood up till now is that the issue is the same on every phone and it can be seen no matter the brightness settings, no matter the colors shown on the phone and no matter what the ambient light is.
[Galaxy S II General] BarryH_GEG:
Here's some pics of mine...
[Galaxy S II General] EarlZ:
0% Brightness

About 50-60%

100%

My TN monitor seems to produce better greys upto box #20 , 25,30,40 seems better on the Galaxy S2, black levels are superb on the phone though.
[Galaxy S II General] BarryH_GEG:
I'm pretty sure the majority is fine for reasons I've stated a dozen times. If that weren't true, this is what happens...

http://www.tmonews.com/2011/07/class-action-lawsuit-filed-against-lg-for-g2x-troubles/

What makes you think the majority of phones are like yours or the majority of people share your expectations? And if the majority is experiencing what you are, why do you think this isn't a bigger issue? People on this forum aren't shy, look at the level of participation in the battery life threads. Again, the issue(s) exists. Based on pics posted and your and my representation of different sides of the spectrum people can decide where their expectations are most likely to fall.
[Galaxy S II General] BarryH_GEG:
Mine looks more yellow than yours yet your screen (based on your description) tends more toward yellow. The pics make mine look more yellow than looking at the display directly though.