yashsingh1/xdaforums huggingface dataset:
[Galaxy Tab S Q&A, Help & Troubleshooting] Armpowered:
It's daytime for me at the moment but yes from memory, if you display an actual black image then it will appear as black, you see this effect when trying to display an image that is almost black, at very low levels of light output the (my!) panel isn't even.

The attached image is R0 G10 B20 and on my PC looks black - it isn't I just used "ColorPic" to check the screen colour and it shows those values.

It's not a big issue but does appear when using in fully dark room with brightness turned down, I notice it in some apps that have very dark background colours (which you'd assume were black and see as such in daylight, but aren't).

Obviously under these circumstances an LCD would appear as a (relatively) bright grey !
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
OK I'm a bit confused. The image you attached looks either black or very very dark gray on my screen. No color variation at all. Oh well :)
[Galaxy Tab S Q&A, Help & Troubleshooting] Armpowered:
Same on my tab in daylight, it only appears patchy when in a very dark room with brightness turned right down. Maybe amongst the variations some will be perfect?
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
Still beats LCD light bleed :)
[Galaxy Tab S Q&A, Help & Troubleshooting] Ty_Bower:
My Tab S 8.4 was purchased three or four weeks ago. I understand exactly the issue you describe. I believe mine is the same. Google the phrase "mura effect" to see more. I expect this is an unfortunate side effect of the otherwise lovely AMOLED display.

I would have returned mine, but Best Buy has only a 14 day return period.
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
I'd call samsung and get a replacement... Here's mine. I just viewed a black wallpaper thru Maxthon browser, as you can see its all black.
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
This "mura" effect is NOT a normal side effect of the amoled screen on the Tab S. This may have been an issue with prior amoled screens but the one on the Tab S is of dramatically better quality than prior versions. If your screen has this significant mura effect there is something wrong with it.

The super amoled screen on the Tab S is basically identical to the S5. Here is an excellent article discussing the major advancements.

http://www.displaymate.com/Galaxy_S5_ShootOut_1.htm
[Galaxy Tab S Q&A, Help & Troubleshooting] rey_1178:
This may be a dumb question but do any of you think the screen issues leaning a little bit more towards the 8.4 version have anything to do with the 8.4 using diamond pentile subpixels in comparison to the 10.5 using RGB stripe pixels? Should we be able to even see the difference?
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
It does seem most of the complaints are from 8.4 users.... I was reading a thread the other day and thought I was happy I got the 10.5
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
You nailed it down, and thank you for posting a suitable picture for testing purpose.

The issue is mostly noticeable in the darkness, and on dark backgrounds. However, it is visible no matter what backlight setting I use, even the brightest.

I also notice a slight yellow tint on the affected areas on white background, that is what got me suspiscious at first, while reading e-books.

If the background color is black, pixels are turned off leading with a perfect black that beats any LCD screen. Extreme dark colors are the ones that reveal the issue.
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
Just to make sure, could you test with the dark blue background instead of the black one ?

As the screen technology on the 8.4" tab is different from the one on the 10.5, it sounds quite possible that your wouldn't be affected, when all 8.4" ones would.

I will keep investigating the issue and read more about the Mura Effect. Thanks guys!
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
Post a picture you want me to test it on so we are looking at the same pic
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
If the white on your screen appears yellow then you likely have a defective screen. A number of users here have reported this, returned their tablets and found that there was no longer a yellow cast. White should be white. There have been users of the 10.5 tablet which reported the yellow cast to their screen as well.

People. These things are expensive. Get one that works and makes you happy.
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
Just curious did you get the 32gb 10.5 or the 16? I got the 32
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
Got the 16 because the 32 only came in bronze and I don't care for that color personally (although I do have the bronze book cover which I do like - yeah weird).
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
For some reason I think the 32gb phones/tabs run smoother. I know it's probably not true but just a perception I've developed over the years and now live by lol. I got the bronze 32 but covered it with this:
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
Nice case. I need a kickstand for watching Hulu so I got the book cover.
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
Ya I got that too lol. I'll switch them out from time to time. The book cover is very nice as well.
[Galaxy Tab S Q&A, Help & Troubleshooting] rey_1178:
I love my book cover but that is a nice one .
[Galaxy Tab S Q&A, Help & Troubleshooting] rockbastard:
3 I work with all have the 8.4 version they all have an area where the Mura Effect is visible and not only if you goes to an extreme to see it which is a bit worrisome, this being a premium product. I wounder if anyone have a 8.4 version completely with no Mura effect?
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
It seems to be a global issue on Tab S 8.4, while 10.1 seems to be flawless.

The technology being different, it's not too surprising. Yet it remains annoying from a premium product, considering that newer technologies now allow to resolve this issue.
[Galaxy Tab S Q&A, Help & Troubleshooting] mitchellvii:
Just stopped by my local bestbuy and was looking at the 8.4 unit. If anything its colors were better than on the 10.5. Black blacks, white whites, no yellow, no mura. This has to be related to a bad batch.
[Galaxy Tab S Q&A, Help & Troubleshooting] AZBoomer:
This is not how you would check for the Mura effect on these screens. A black background like you're viewing will make the pixels turn completely off (should appear completely black/OFF). To test for this problem you need be viewing colors that are very close to, but not actually black...

Use the files that I have made in my other thread. Image 1 should be completely black. Images 2, 3 or possibly 4 should be where you see the Mura effect.

http://xdaforums.com/galaxy-tab-s/help/galaxy-tab-s-backlight-bleeding-problem-t2838337

I wish I saw this thread a few weeks ago....
[Galaxy Tab S Q&A, Help & Troubleshooting] Inkedadrenaline:
OK thanks. Just viewed your link and I guess I'm lucky not to get one out of the bad batch. Mine looks perfect. [emoji2]
[Galaxy Tab S Q&A, Help & Troubleshooting] rockbastard:
Is your version a 10,5 or 8.4?
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
I just purchase it yesterday, mine is 8.4 LTE edition, also got the "mura effect" when viewing in dark room without light. (just view the notification pull down). My white is still pure white no issue but I do have this "mura effect" in dark color background.

I not sure want to return and replace or not, during normal condition, it is display perfectly well.

I am also Note 4 owner and my Note 4 don't have this issue.
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
This is my current screen look. I am waiting stock arrival for replacement.
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
This is unfortunately pretty much what the screen looked like on the 3 different Tab S 8.4 I tried. Please keep us updated if you manage to get a flawless one, this issue is pretty much ruining my experience of the tablet. Well, that along with the red smudge and the stuttering issues. So sad considering how the tablet is perfect on most every other aspects !
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
Finally I change my tab S but i decide switch to 10.5" edition by top up little. :)

Now no more halo effect. :) I had check 8.4" demo set also no issue.
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
Damn, you decided to go big. I wish you would have taken another 8.4 just to be sure it is not affected by the same issue. I checked two of the 8.4" I went thrugh in stores as well before bringing taking them, but couldn't detect the issue before I was home in the darkness.

10.5 uses a different AMOLED technology, the same as the one on Galaxy S5, and doesn't seem to be affected by mura effects afaik. I am tempted to contact samsung and return the unit for repair/exchange, but I already traded it twice at the store without improvements. I'm not even sure Samsung would consider it a flaw, and am worried they would charge me the transport fees before returning the same tab.
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
The 8.4" demo set don't have this issue because i checking inside their store room by switching off all the light.

The shop had no idea what is this mura effect are, after they check the demo set and notice no issue, they just let me one to one exchange.
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
The shop exchanged mine twice as well, but all had the issue (and with different mura layouts). I guess I'll try my luck with Samsung now, thanks for your feedback !
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
Why don't you test first before take.

I believe as long is a shop, they sure have store room, request them check inside store room with all light off, then you can get a proper unit.
[Galaxy Tab S Q&A, Help & Troubleshooting] DUHAsianSKILLZ:
Where are you guys getting these screen issues? Like which shop and country/state.
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
Mine from Malaysia Samsung Store.
[Galaxy Tab S Q&A, Help & Troubleshooting] DUHAsianSKILLZ:
Wow inside the Samsung store? Dang. I got mine from Walmart a few weeks after launched. No issues so far. My country is USA.
[Galaxy Tab S Q&A, Help & Troubleshooting] ukael:
Mine was in France, FNAC store
[Galaxy Tab S Q&A, Help & Troubleshooting] Andrewtst:
That unit is probably lemon set. Lucky now my unit is in great condition.
[Galaxy Tab S Q&A, Help & Troubleshooting] Darkdiver83:
Mine's is a 8.4 from staple Canada and I can notice a small purple shift in the dark grey tone on the bottom of the screen when the room is dark. When the black is really black I have no issues. I used SwiftKey with material dark theme an the issue is there, again, only when the room is dark, tab luminosity low and the color are plain, not noticeable on photos and videos.
[Galaxy Tab S Q&A, Help & Troubleshooting] H:S:
So I'm not the only one..

Hi there!

Thank you, ukael, for starting this thread. I bought this tablet mainly because I like to read in the bed and the no-lightbleed-possible OLED display was the single most important thing that made me go for it. So, yes, I was also a bit disappointed when I noticed that the text (white on black background) has kind of blue / red tint to it in one corner, and green-ish in the other.

I'm still wondering about whether I should get a replacement, but since I see that many others here report the same issue with their S 8.4, this is probably due to the limits of the manufacturing technology used and the new unit could possibly be even worse. And considering that the world is not overflowing with OLED display wielding devices yet, it is probably not an easy task to manufacture one without any flaw, so I can't really hold any grudge against Samsung -- it is still an amazing screen in many ways.

That said, it _is_ kind of annoying at times and I'm still thinking whether this could be corrected in software -- there are probably some differences between any two devices, but the main part of this problem is that the screen is too bright in the top-left corner and / or too dark in the bottom-right one* and each channel behaves differently (see attached pictures**). It could be possible to simply apply gradual gamma correction for each channel so that the dark areas get a "boost" and show up brighter as they should be.

There are already programs doing some color filtering magic, like CF.lumen, but I'm worried whether it would be possible to apply a correction in the form of a gradient -- uniform filtering of one color is one thing, but applying a gamma correction and deciding for each pixel what is the right value could be too GPU-intensive to make it a viable option. But I'm not an expert, so I keep wondering... Any ideas in this respect, anyone?

--

* My guess is that the display data connections are in the top-left corner (portrait mode) and the signal voltage simply drops too low before it reaches the bottom-right area. Since LEDs have a non-linear output dependence on the applied voltage, getting a precise light output level when it is nearly switched off is very difficult -- it reacts "wildly" to even slightest change in voltage, so it is not much of a surprise that the unevenness becomes worst at the lowest brightness setting / when using dark colors..

** First three photos are displaying R: 10, G: 0, B: 0 etc. at maximum brightness; the last one is G: 10, B: 20 or the other way around, I kind of forgot. All are using the same exposure 5 seconds and ISO 400. (The bright points are in fact white (menu buttons in ArtFlow used for testing), the green tint is likely just some weird effect of the lens in my camera.) The blue channel is obviously not affected nearly as much as the green and red channels and that's where all the color differences come from..
[Galaxy Tab S Q&A, Help & Troubleshooting] DUHAsianSKILLZ:
Deleted
[Galaxy Tab S Q&A, Help & Troubleshooting] Shriker:
I had my 10.5 replaced this week partly because of a yellow tint on pure white screens but the replacement is just the same :(

On pure white screens i find that, in landscape mode, about 75% of the middle horizontal has a slight yellow cast and if i tilt the top or bottom by an inch it makes that cast disappear by moving it mostly off to the top or bottom. I can't quite work out if i'm just being picky and can't actually tell what white should look like. I know i prefer a colder tone to a warm one on my TV and monitors as they look far more accurate to me so maybe my vision of a perfect white is moving into the blue and is just different from Samsungs? My current Tab tested with the "R0 G10 B20" dark image shows the absolute mildest mura effect at lowest brightness while the previous one was a bit more prominent. Also the yellow cast is the same in greyscale ultra power-saving mode. I think that's something people could check to remove colour calibration issues.
[Galaxy Tab S Q&A, Help & Troubleshooting] wacky26:
:mad::mad::mad::mad::mad::mad::mad::mad:

Samsung is probably the worst investment I have had since smartphone began. I have a Galaxy Tab S 8.4 T705 which was bought April 2015 from a gadget store inside a mall here in the Philippines. In which later I found out was also one of their authorized service center. Just this February 2016, it just suddenly started running into problems with the LCD. It suddenly had the yellow tint on the whole display that you almost could not read anything unless you manually set the brightness to max.

So I brought it immediately to the store where I bought it from since it still has a warranty. But alas, to my dismay, my warranty only covers the service. Nothing I could do so I just let them check my tablet. Initially, the technician said it could be the motherboard. I was told to leave my tablet for further testing and it would take about less than a month till I get it back. So I obliged, filled up some forms and they took my contact number. A week after, the technician I have spoken to called me and told me that the problem was with the lcd display itself and not the motherboard that they have to replace it which would cost me Php8,500 for the lcd display alone. I gave him the go signal because I was really anxious to get my tablet back. Almost half of the time, everyday, I do my work from that tablet. But what could be worse? The technician called me the next day (today) and told me that my tablet originated from Singapore and that they had to order the lcd from Samsung Singapore that might take a month before they would receive the part they will order! This is really infuriating!! How low quality Samsung's product is. Despite how well I had taken care of my tablet. Never been dropped, installed with tempered glass, and encased on an Otterbox defender series ballistic case since day one! I'm never recommending any Samsung product to everyone I know or to anyone!
[Galaxy Tab S Q&A, Help & Troubleshooting] prssdghrzmhmd:
yes. for me too.

"ukael" is right.

I had this problem too. on my both two Samsung Tab S 8.4 LTE T705.

on first I thought it is related to that one, but after purchased my 2nd Tab S 8.4 T705, I noticed screen going yellowish.

specially in middle screen while in horizontal rotate specially reading something that has white background.

I completely disappointed.

Is anyone here whom tried Samsung Tab S II 8inch and experienced this same problem on Tab S2 ?
[One (M8) Q&A, Help & Troubleshooting] DJ_Casper:
Hello people,

Recently I bough HTC One M8 Dual Sim version and Unlocked it via bootloader + installed TWRP recovery 2.7.1.0 and I can't install ViperOneM8 v1.7.1

1) Is there any custom ROMs out there for using on this beauty?

2) If there are any people who can provide me Stock Kernel/ROM/Recovery > Please share with me so I could turn back to Stock ones while there is no support for Dual Sim version via ROMs

Best Regards,

Igor B.
[One (M8) Q&A, Help & Troubleshooting] guidogsbn:
Hi, I haven´t unpacked yet, it arrived today. If I find announcements for ROM / Recovery, I will tell.

In this Thread, post 2 is a link to stock recovery:

http://xdaforums.com/htc-one-m8/help/htc-one-m8-dual-sim-european-version-t2816991:cool:
[One (M8) Q&A, Help & Troubleshooting] DJ_Casper:
Ty for your reply. Would be great to have a Custom Recovery cause stock ones sux hard :cowboy:
[One (M8) Q&A, Help & Troubleshooting] htarrada:
From where i can buy the device online?
[One (M8) Q&A, Help & Troubleshooting] guidogsbn:
In Germany it's "mediamarkt.de"
[One (M8) Q&A, Help & Troubleshooting] lge73:
Custom ROM

Is there any custom ROM for M8DualSIM? It-s a great phone, there is no one who make a good ROM?:confused:
[One (M8) Q&A, Help & Troubleshooting] DaKyy:
I also recently ordered a M8 dual sim. No roms seem to be around. What is the situation for M7 dual sim? If there is none by now for M7, I doubt M8 will receive a custom rom. Don't know how hard would it be to make a rom compatible with dual sim version.

Maybe we should collect a donation for someone willing to make a port of their custom rom for dual sim version :)
[One (M8) Q&A, Help & Troubleshooting] Buerschi:
4036

I would donate as well..

Are there any news to Custom Roms for the HTC One M8 Dual Sim?

Maybe the Pros could help here :o

Regards
[One (M8) Q&A, Help & Troubleshooting] guidogsbn:
What about that, posted today via twitter:

LlabTooFeR [MENTION=494185]LlabTooFeR[/MENTION] · 1 Std. Vor 1 Stunde

HTC One M8 Dual SIM receives 4.4.4 update. ROM Version is 3.33.401.6 (645.83 MB)

:good::good::good::cool::cool:

If LLabToofer will cook a ROM on that base, he surely will receive a nice pre Christmas donation, promised!!:cool:
[One (M8) Q&A, Help & Troubleshooting] DerBobo:
Yes Maximus HD 2.0.0 (KK 4.4.4 Base) is the only custom ROM I know. :) ;)

sent from my HTC One M8_DUGL with rooted Stock 4.4.4 and s-off
[One (M8) Q&A, Help & Troubleshooting] JoostA:
Cyanogenmod ROM for HTC One M8 Dual Sim available !

Since a couple of days there is a Cyanogenmod version available for the HTC One M8 Dual SIM. I wrote a message about it:

See : forum.cyanogenmod.org/topic/99803-dual-sim

(Well, I have to cut out the hhtp part, to be able to post the link, please put it in front yourself.)

Probably best to continue there, to avoid different threads on this. To cut short: even though there is only an alpha version, it is so much better than LLabtoofer 's version (and HTC's stock ROM) , I strongly recommend switching to it immediately.
[One (M8) Q&A, Help & Troubleshooting] fightduck:
nope. now only maximus hd 3.0.1 and i find it the best rom. what you need? sweet graphics for girls? =)

if you need it than go for CGM with some tools, as wrote above.

if you need STABLE rom for man use maximus hd 3.0.1 =)

or just buy new phone))
[One (M8) Q&A, Help & Troubleshooting] gazzacbr:
Hi, or LineageOS. I am on Nougat 7.1.2,, everything working fine. It's official so gets updated weekly :D
[Android Q&A, Help & Troubleshooting] viperML:
Does input text command exist? Shell needed?

I mean like the input tap command:

input text <text to be tried to place>

Thanks -
[Android Q&A, Help & Troubleshooting] gkillershots:
a chommand like "echo"?

in terminal you can use echo + your text and it types your text
[Android Q&A, Help & Troubleshooting] viperML:
No, I want a commanf to be run from Tasker that will input text (where the cursor is)
[Nexus 7 Themes and Apps] snely:
No credits necessary... I don't have a cell yet so I'm doing best I can do get my tablet to suffice as of right now.

Thoughts?

Love

Snely
[Nexus 7 Themes and Apps] furious84:
Skype need credits, so maybe whatsapp or similar..?

Inviato dal mio Nexus 7 utilizzando Tapatalk
[Nexus 7 Themes and Apps] snely:
Well I'm using a tablet so WhatsApp is not compatible.

Regards

Snely
[Nexus 7 Themes and Apps] Carlyle_f:
It is, sideload it. I have my WhatsApp and BBM running on my nexus 7.
[Nexus 7 Themes and Apps] SMR-DINO313:
How do you side load it
[Nexus 7 Themes and Apps] Carlyle_f:
Download the apk. Google it. Or extract it from another device then browse to where you saved it and click on it.
[Sprint HTC One (M7)] haq.adnan:
I am using the sense 5.3.651.3 odexed one with modified firmware in india but i am unable to use 3g....any help will be appreciated..
[Sprint HTC One (M7)] haq.adnan:
Despite getting full 3g network reception its speed is soo slow....plz help
[Sprint HTC One (M7)] Devilish_Angel:
... do you get 3g or H on your signal bars or its stuck at 2g or E ? ...
[Sprint HTC One (M7)] haq.adnan:
I get full 3g or h network reception but the speed belongs to 2g...its verry annoying...
[Sprint HTC One (M7)] indy1811:
I'm using 3G in Bangalore. Works just like any other phone bought locally i.e. in areas where there is good 3G coverage my speed crosses 10Mbps and in areas where the signal is bad it barely connects.
[Samsung Galaxy W I8150] biofaust:
DSP manager is not affecting bass or audio equalization neither for earphones nor for the speaker.

I have a rooted GT-i8150 with [MENTION=3044346]arco68[/MENTION] CM 11.0 ROM installed.

Dunno if it is meant to, but DSP manager doesn't seem to be requesting root access.

Anyone can help?
[Samsung Galaxy W I8150] dec0der:
I don't think DSP manager need root access to work. Just look for other audio enhancement if it doesn't work.
[Samsung Galaxy W I8150] biofaust:
Any suggestions?
[Samsung Galaxy W I8150] dec0der:
Try AC!D Audio Engine 8.3. Kindly read user comments 4-5 pages from last.
[G3 Q&A, Help & Troubleshooting] B4rnzEE:
Hi All,

My quick circle case came today and the clock is not central in the circle?

IS there any way to fix this? Im not sure if it is to do with the fact im on a custom DPI, but its really annoying.

The case is an official LG Case, but its the korean variant which replaces the backplate (has wrong wireless charging pins but otherwise fits pefectly)

Any pointers?