yashsingh1/xdaforums huggingface dataset:
[HTC One X] BarryH_GEG:
This is interesting. I read somewhere that the One X display is sourced from Sony. The Experia S' display has been yellowing when exposed to high temperatures. I wonder if the One X's issue(s) are related?

Sony Xperia S yellow display issues 'limited', says Sony

By Luke Westaway on 2 April 2012

Sony has owned up to a problem with the Sony Xperia S' display, which causes the smart phone's screen to show an unsightly yellow tint if it gets too warm.

In a statement sent to CNET UK, the Japanese electronics giant acknowledged its newest mobile has a display problem, saying, "Sony Mobile Communications has identified that the display on a limited number of Xperia S smart phones may show a slight yellow tint if exposed to temperatires above 40 degrees Celsius."

That's not a good sign at all, though Sony promises that the fault is limited to a "small number of units" and that its manufacturing process has been corrected.

If you've noticed your Xperia S turning an eye-offending shade of yellow when it gets too warm, Sony's advice is to get in touch with your local customer service centre.

"Sony Mobile Communications will resolve this at no cost to the consumer."

That's good news, though it's a shame to see Sony's first smart phone since its split with long-time partner Ericsson marred by such a glitch.

Yellow-hued screens aside, the display on the Xperia S is probably the phone's best feature. My esteemed colleague Natasha called the 4.3-inch, 1,280x720-pixel panel "undeniably gorgeous" in her review, though the phone isn't so smart in other respects, rocking an old version of Android and a slightly clunky design.

http://crave.cnet.co.uk/mobiles/sony-xperia-s-yellow-display-issues-limited-says-sony-50007526/
[HTC One X] wai_lai416:
hmm.. i actually don't think there's anything wrong with the panel even though it's a bit yellowish.. reason being.. my option screen appears a little yellowish too.. but i looked at the play store icon on the yellowish background.. and it looks perfectly white to me.. so is it really a screen problem? coz it's certainly capable of displaying perfect white
[HTC One X] Rekoil:
Could someone with a "yellow-ish" screen please follow these steps so that we can see if there's actually another panel, or just bad quality control on the one panel we have.
[HTC One X] Tinderbox (UK):
LCD-TEST show horizontal banding for me as well, what is strange is if you rotate the screen the lines move as well.

I created a 720x1280 image, both gray and white in paint.net and sent them to my HOX, viewing them in galley i see no horizontal lines on the grey image, and the white is beautiful no sigh of any yellow.

John.
[HTC One X] wai_lai416:
hmm my serial number doesn't start with HT23 or HT24 it starts with SH23??? mine came in the premium pack bundle that came with the beat solo headset
[HTC One X] riz157:
Yes I have noticed that on my phone white, sent it back getting another.
[HTC One X] jonstatt:
I can't check mine at the moment...but I had 4 of these phones alongside each other. One was very white, one was quite yellow, one was very pink, and another one a bit pink. All of them had different maximum brightnesses and all had slightly different viewing angles. I have to say, I suspect they are actually all the same vendor and the variances are just rather large! The one that was very white, only looked so against the other phones. Held next to my calibrated monitor it was actually a bit greenish.

The variances come from variations in the colour temperature of the LED backlights, the filter and the micro-thickness variations in the panel sandwich.

The one that was very white had all sorts of problems including bad backlight flicker and absolutely insane screen corruption where the image would appear shifted to the left, so the left side of the image was wrapped over to the right of the screen!!
[HTC One X] myself11:
Thanks for the report, jonstatt. It seems picking a perfect one is playing on the lottery.
[HTC One X] hamdir:
posted this in the mega thread
[HTC One X] jonstatt:
Did you run your screen a lot on full brightness to get that change to happen? Mine looks a bit yellow when the screen is dim, but gets whiter the brighter it is. Unfortunately it is also slightly uneven, being a little more yellow towards the bottom of the screen than the top.
[HTC One X] hamdir:
autobrightness which i find to work perfect on firmware 1.26

you can notice it still has some very faint patch on the middle of the top part only obvious in the photo, but before it was very obvious more yellow at the top

now its gorgeous :D
[HTC One X] myself11:
Thanks, hamdir!

I trully hope your glue theory proves right. I'm gonna copy/paste your entire post to a portuguese forum (with your username). Hope you don't mind!
[HTC One X] hamdir:
ofcourse mate
[HTC One X] myself11:
I've took 2 new photos, which I think are more accurate and show a less yellow "myself11"'s One X :) . On 2nd photo I used Screen Adjuster (blue +15). I think a slight improvement is noticeable.

Autobrightness

Autobrigthness with Screen Adjuster (blue +15)
[HTC One X] jonstatt:
I am familiar with screen adjuster, but I read there was evidence that it causes a slow-down as every pixel has to be translated through this process. Has anyone noticed slow-down as a result, particularly with games?
[HTC One X] myself11:
I've tested it a little bit with Reckless Racing HD and failed to notice any slowdown, but picture got better.

Of course this shouldn't be a permanent solution.
[HTC One X] hamdir:
thanks, i didnt know when can adjust!
[HTC One X] Dacoco:
My first one was great white, the 2nd one was great white too but they had pixel defects and on the 2nd the power switch was slightly defect.

The 3rd one is quite yellow and has dust under the screen and i can put a fingernail between display and chassis.

I am really annoyed from htc. What the f.... is this? Never got any of these problems with other phones!
[HTC One X] wai_lai416:
Mine started off a little yellow.. used for a day now its perfectly white now :)
[HTC One X] joora:
has anybody with the noticable yellow screen checked their panel vendor and is it different than those of the white screen?
[HTC One X] Dave Trouser:
Uneven backlight?

Has anyone else noticed their screen being slightly dimmer toward the top? Mine was ok in the first few hours, but after a day or two of proper use, the top half is really quite dim like a smudge - really noticeable when displaying the Google homepage. It's not that noticeable on mixed colour screens - just uniform white and grey, and blue and less so with red and green.

See my photo of the screen here: http://xdaforums.com/showpost.php?p=25075567&postcount=116

---------- Post added at 04:38 AM ---------- Previous post was at 04:18 AM ----------

That adb command gives a file not found error for me. Listing the content of /proc/ there is a "kmsg" file. Permission denied in accessing that though. Do I need root?
[HTC One X] myself11:
I have mine for 5 days now and it's the same yellow :(

---------- Post added at 12:06 PM ---------- Previous post was at 11:19 AM ----------

A photo posted by a XDA fellow user:

Mine after 4 days of moderate use (auto-brightness):

hadmir's photo
[HTC One X] joora:
To be honest, both screens in hadmir's photo seem to have yellowish tint, while the left one on the first picture has pure white (even a hint of blueish) screen.

The only question remains are there two different panels, or there is only one panel with quality problems, or there is problem with the glue, light, ...
[HTC One X] LadFromWales85:
I ordered two One X's at the same time, white and grey, from the same place.

Opened the grey one first. Settings looked white to me, until I opened the white one, which was whiter and made my grey look yellowish.

The White X had really bad distortion when applying just a small amount of pressure to the capacitive buttons or the screen edges. It was so bad I'd be afraid of cracking the screen with it in my pocket!

The Grey X requires a fair amount of pressure to cause distortion, same as with any LCD display.

I installed a display tester on both.

The White X when displaying pure white appeared to be very white.

The Grey X appeared very slightly yellow in comparison.

The Grey X looks white until I hold it next to the White X and look at them both at the same time.

Non-issue, IMHO.
[HTC One X] kruppin:
I have now checked last_kmsg on both phones, and there are indeed two different panels! The warmer one have panel_id=0x294000f while the colder one have the same as you guys, panel_id=0x4940014... Panel vendor is same as panel_id. So, there you go! :p

Edit: Attached kmsg from both phones.
[HTC One X] Tiersten:
Thanks for doing that. It is useful to know there is a difference and its not just manufacturing variance.

On a side note, do you have 1.26 or 1.28? Your kernel logs are slightly different to mine and the other One X I've looked at.
[HTC One X] kruppin:
They are both 1.28
[HTC One X] joora:
Thank you for the confirmation.

Now all that is left is to examine do the panels have similar performance (besides difference in tint) - viewing angles, ghosting/refresh rate and so on...

I really hate it when a manufacturer puts two different screens on one phone model. Some might say that difference in color reproduction is a non issue, but I say it does have an impact on user experience. And on a flagship phone like HOX you can't have such difference in quality (not only screen tint, but flicker, flex and so on...)
[HTC One X] myself11:
I have a yellowish one and I'm really angry with HTC. I was a fan of the brand, but no more. I could stand the gap between screen and body better thant this.

It's still a fine screen, but not as good reproducing color as the units with white panels and it's not acceptable such discrepance.
[HTC One X] BarryH_GEG:
Then you should definately get a Samsung product...

Or perhaps the Xperia S?

While it shouldn't be, when producing displays in the millions there are bound to be deviations. No matter what phone or manufacturer.
[HTC One X] myself11:
It's not because Samsung is worst, that this is an acceptable situation. And this is not a deviation like, for instance, gap between frame and screen, that can happen. It is not something random and unpredictable: Acer panels are visibly whiter than Sharp ones. HTC knew this.
[HTC One X] joora:
This is not a quality control/production problem, HOX uses two different screens from two different manufacturers in the exactly same model.
[HTC One X] kruppin:
From my personal experience the colder (whiter) one does have better white and also for me better colors (but not by much), and that about it. The other one is better in every other way. Specially viewing angels, the picture almost don't darken at all with the warmer (yellow'er) and it's noticeable brighter too. The cold on actually gets alot darker in wide angels, not like a TN-panel ofc, but it's enough to be annoying. And with the cold one you don't have to press that hard to press the actual screen while the warmer don't have that problem. But this probably doesn't have anything to do with what panel there is, unless it's thicker ofc.

Haven't had the chance to a proper test if there is a difference in battery just yet, but it feels like the wamer one get yet another point here (specially with it being brighter on the same brightness and therefore can be set lower). But I dunno. Same with refresh rate and ghosting, haven't tested. But this usually isn't really a problem on phones. Atleast not on the ones I've had.
[HTC One X] BarryH_GEG:
Yes and no. There are two panels, one's warmer. But, both panels deviate. I've seen good examples of both the warm and cool panel side-by-side. Had I not, I would have been perfectly fine with the warmer panel. I prefer cooler whites so I kept the cool one. Some people prefer warmer displays; that may have chosen otherwise. I've seen pics of cool panels that are cooler than mine and warm panels that were noticeably yellow. I think the latter is what bothers people the most.

Google "iPad yellow displays" and you'll see that LG sourced displays are warm. This isn't something new and it's not unique to HTC. And from the pics I posted earlier both Samsung and Sony have similar issues. It’s the nature of the beast.

I'd bet you that 95% of people walking in to a carrier store to buy the phone wouldn't notice or care (except where there's noticeable deviation or defects). HTC's been using two panel vendors since the Sensation and it was never discussed anywhere other than XDA.
[HTC One X] Tiersten:
I have to push harder than I would normally on the edge of the screen for that to happen with mine. The center is completely fine with the pressure I put on it. This is with the colder looking screen according to your tests.
[HTC One X] BarryH_GEG:
You're not pressing on the actual display, you're pressing on an overlay. If there's an issue with it or with the digitizers it doesn't matter what display is underneath it. And it doesn't matter whether the outer casing is grey or white; the phone's pre-assembled and put in a case at the end of production.
[HTC One X] joora:
I agree with everything what you've said. But what bothers me is the inconsistency in the quality of an expensive product - I'm not talking about only HOX, but also Sony's, Samsung's and Apple's offerings. Devices that are the best and most expensive offerings from the respective manufacturers should have strict quality control to eliminate any deviations - especially when the part in question is the display - the most important HCI part of a touchscreen phone.
[HTC One X] BarryH_GEG:
I totally agree with you. But using myself as an example. If Motorola spent 10% more than everybody else creating consistent and nearly flawless products I probably still wouldn't buy them because I don't like their designs or s/w. In reverse, I had a LG G2X that was so putrid I’d never buy another product (even a toaster) from them again. That phone makes the One X look six sigma. If quality and consistency was the number one driver in consumers purchasing decisions manufacturers would pay more attention to it. It comes down to getting what we’re willing to tolerate. And since all the phone manufacturers have issues to some degree there's not a lot of places we can turn.
[HTC One X] Tiersten:
I know. I'm just curious as to what kruppin means by "the cold one you don't have to press that hard to press the actual screen while the warmer don't have that problem." I've no experienced any issues at all with the "cold" screen in my One X.
[HTC One X] BarryH_GEG:
When he says "cold" he's comparing a phone with a cool display against one with a warm display saying they respond differently. Whether it's a Sharp or Acer panel, warm or cool, in-spec our out of spec, the behavior of the display is controlled by the overlay and digitizer(s) which are the same (or should be) in every phone. So there's no relationship between what the panel itself looks like and how it behaves.
[HTC One X] Tiersten:
As I said earlier I know. "you don't have to press that hard to press the actual screen while the warmer don't have that problem" <--- You see the part that says "press that hard to press the actual screen"? I'm asking about that part.

I know I'm pushing on a piece of glass which has the digitizer on it and that is then pressing on the LCD which is underneath. I don't particularly care that I've got the same panel that kruppin calls "cold" as it looks great to me and I've not experienced any problems with it or the rest of the phone. I'm just curious as to what kruppin means about pressing on the screen as I've not experienced this fault.
[HTC One X] Eggcake:
Aaah, I suspected something like this! I also noticed a small yellow tint on my device, but didn't matter that much. The whites weren't the problem, but the greys were! Like in the notification area or in the app drawer.

Now it's clear... :)

I had to return it anyway since it doesn't respond anymore, but I will be okay with both screen in the end, as long as the damn thing works properly :D
[HTC One X] bobmarsh72:
My screen is very half and half. It is white on the top half and gets a yellow tint on the bottom half the more I use the phone and it heats up. I think it may be the glue.

Regardless I have just rung up for it to be replaced.

I'm not really bothered which screen I get, but just want it to be the same colour through out.
[HTC One X] jonstatt:
Having seen about 7 of these phones now, I noticed that most (not all) had an uneven tint across the whole screen. But it is fairly slight. If it is more yellow anywhere on the screen it is always towards the bottom.
[HTC One X] louis.b:
This is EPIC !!!! lol I wish all the people who say **** like "I hate HTC now I'll just buy Samsung", "Samsung is the best" "the One X sucks" or anything to the same effect, will see these pictures and shut their trap.
[HTC One X] Dacoco:
Can i check my display vendor without root?

I tried to get last_kmsg from the phone but in the ~900k file there is no display_vendor entry...

Could someone with the colder / whiter display please install "Android System Info" and check the value Display on Buildinfos?

I have a IML74K here...
[HTC One X] Tiersten:
Doesn't need root. Reboot twice. First time clears the log and starts a new one. Second time will retrieve the previous log.
[HTC One X] Dacoco:
Okay, this is strange!

Currently i have 2 One X here.

No 1:

panel_vendor 294000f

(Supposed to be warmer one)

No 2:

panel_vendor 4940014

(Supposed to be colder one with better white)

In fact, both are yellow when i compare them with a absolute white one in the local electronic store and No 2 (!) is not so bright as No 1.

WTF!?

I checked on maximum brightness and No1 is about 5 days old, No 2 absolutely new and the one in the store minimum 3 weeks old.
[HTC One X] Tiersten:
Guess the panel vendor makes no difference. It is just you and kruppin who have actually checked and have more than one handset. It is only a sample set of 2 so can't draw any really big conclusions from it.

Interesting that there are two different panels but it is beginning to look likely that it doesn't directly affect the actual display e.g. colour temperature, saturation and brightness.
[HTC One X] Eggcake:
hamdiir,

Did yours white the yellow tint have the "yellow" panel? And it got whiter?

I hope this is also the case for me. Actually, I didn't really notice it (I saw a slight yellow tint, but could live with it). Until I compared it with a phone in a local store. Wow...the whites are really beautiful there and the colors in general look way better.

I'm not sure, wheter I should get it replaced or not. I think I can live with it, but I hope it's getting better over time.

As the phones in the shops are on nonstop (the displays too, they show some kind of demo), it's possible that every one of them was also yellow in the beginning.
[HTC One X] myself11:
If it's that much yellower, probably you have a yellow panel. If you can get another One X, get it. Believe me, I have a "yellow One X" and I'm always thinking about it.
[HTC One X] Eggcake:
Well, it's already my second one and otherwise it's working perfectly. The next one will probably again be yellow, I know it...

I think it's idiotic from HTC that they promote their screen, also the reviews and in the end half of the customers get a much worse experience. I bought this device also because of the (supposedly) awesome screen! Damn, seriously... :(
[HTC One X] vegetaleb:
Could a HT23X have the whiter screen?

I checked one this morning and was not sure
[HTC One X] Dacoco:
I asked HTC on their Facebook page why they always use two different panels. I really don't think i will get an answer but if yes, I'll ill post it here.
[HTC One X] schriss:
Isn't this really down to individual panel calibration or some color temperature setting somewhere? build prop or whatever or maybe even an app from Play
[HTC One X] Eggcake:
If you know an app where I can change color temperature or something, please let me know.
[HTC One X] Dacoco:
I dont think so because I compared 2 factory reseted phones with the same software. They should be identical.
[HTC One X] kruppin:
Nah, the both I checked were HT23X, and they had 2 different panels. As far I know the only way you'll really know is to pull last_kmsg and check for panel_id.. Or having two beside each other, but even that isn't that reliable since there seem to be variations between panels with same manufacturer. Maybe glue it's the glue, or maybe they just skip calibrating them.

Looking at the screens by themself the all look kind of ok. What annoys me the most is that the viewing angels are way worse on the cold one when it's better at almost everything else.
[HTC One X] myself11:
I use screen adjuster and I tweak "blue" between +5 and +15. More than that it just gets artificially blue.

Many users are complaining about flickering and other issues, and although very displeasant, at least it will be recognized as a problem. Yellowish panel won't be recognized by HTC as a flaw, though clearly one panel is inferior to another. It's just not acceptable that, due to luck in picking your unit, somes users have a worst experience and device than other.

We should start making more noise. HTC was not honest.
[HTC One X] schriss:
It probably won't work on One X, but at least you can see that there are such apps. It mentions that adjusting LCD color can fix yellow:

http://xdaforums.com/showthread.php?t=909801&highlight=color+temperature

Maybe someone can make it work on One X.
[HTC One X] Dacoco:
Here are my four One X... I take the 3rd one

(All on stock 1.26, full brightness)

I am a little annoyed from the yellow part of the 3rd down on the right side but i am sick of this and i don't want to buy another one.
[HTC One X] DANOFDANGER:
is the white one better or does the warmer one have advantages over the whiter one ??.
[HTC One X] Dacoco:
I'm not sure but i got the flickering problem only on the white screen so far...
[HTC One X] hamdir:
i had both panels, the warmer one is more flawless just badly calibrated some people are saying latest 1.29 improved this

now im on the colder one and honestly i prefer the warmer one had better pixel density (ie grid) and better contrast

the American that anandtech test is different to both sony panel, id, 0x18103

http://www.anandtech.com/show/5779/htc-one-x-for-att-review/6
[HTC One X] Tiersten:
It isn't the same phone. AT&T markets the One XL which is a dual core Qualcomm Snapdragon S4 with LTE.
[HTC One X] brent8577:
i don't see any yellowish or blueish tint on my white colors. it looks amazing to me with no bad pixels. it was sitting around for a few weeks before i bought it and started using it, so maybe this glue thing had time to dry or i just got lucky. i'm not playing games and heating it up real bad, so maybe it changes color when you do.
[HTC One X] Tiersten:
I've got a replacement One X because of GPS issues and it has the other 294000f panel in it. They both looked exactly the same to me when I had them side by side for a brief moment.
[HTC One X] jonstatt:
Yes that's great now. An other poster also mentioned this change with 1.29. Unfortunately this version is not out yet in the UK so we couldn't see that. Both phones were running 1.28
[HTC One X] HOX User:
Cannot Open Last_kmsg

I ve treid all file managers & text editors to open last_kmsg but it says cannot open file,,

Anybody Help Please

Stock 4.2.2 Sense 5

Unrooted

S OFF & Unlocked Bootloader
[HTC One X] thecueball:
Did you ever find out how to identify the panel? Also on 4.2.2 and there is no /proc/last_kmsg
[Eee Pad Transformer Q&A, Help & Troubleshooting] alvero:
Anyone with a TF101 had success using Amazon VOD with any of the ICS ROM's available in the dev section? I've tried a few ICS ROM's but the video is always unwatchable.