yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Nexus] gaaa.awp:
Trinity kernel fixed purple issue for me.

Even I am sufring from the purple tint and grainy display issue of the display. I have tried various color control profiles and boosted the gamma however it only made the matter worse at low brightness.

I installed trinity kernel today and in the color control panel, there is a thing called contrast level. decreasing it all the way to -24 fixed the purple greys issue. This feature was not present in franco kernel. I believe, as perceived by my eyes, contrast levels and omap gamma are different things. So, all those who are effected by the purple tint issues, please try decreasing the contrast levels and see if this fixes it.
[Samsung Galaxy Nexus] arzbhatia:
Gonna try it out soon :)
[Samsung Galaxy Nexus] annie42:
have you tried it out? did it worked?
[Samsung Galaxy Nexus] gaara.awp:
hey, it worked for me. trust me ;)

omap gamma, i believe, increase the color saturation so it only makes the purple more saturated and the color multiplies change the purple to either dark blue or something else .but does not fix the issue. ill post some pictures showing the efect of contrast sliders in a while.
[Samsung Galaxy Nexus] gaara.awp:
Pcitures showing the effect of contrast slider

hey, here are some pictures taken at very low brightness. sorry for the camera shake.

the one's which show a purple tint in the keyboard and the power control widget are taken at o contrast level (default value, i believe) and the other 2 (that dont have the purple) with -24 value for the contrast slider. the effect is clearly visible, right ? all pics are taken at the same brightness.

p.s: thanks to arzbhatia for his awesome softkeys :)
[Samsung Galaxy Nexus] negrobembon:
I do have the purple stuff only at the very lowest brightness setting, but its barely noticeable

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] jackfrost3821:
I received my nexus and noticed it has grainy screen too. Really disappointed. Main thing is that GNex is not official here, we don't have warranty and can't replace it. :mad:
[Samsung Galaxy Nexus] gaara.awp:
its not faulty, i think its the nature of the screen technology. even if you get a replacement it will probably will be like that. if you hjave color issues then it can be improved by software tweaking but the grainy screen , i guess, is present in all Nexus phones.
[Samsung Galaxy Nexus] annie42:
That's really nice

How's the grainy effect?
[Samsung Galaxy Nexus] ÜBER™:
How do you manually change the screen contrast!???? I really don't want to have to switch kernels and buy an app.

Sent From My Sprint Galaxy Nexus
[Samsung Galaxy Nexus] arzbhatia:
This, is GREAT! Thank you so much for posting this! (Check PM)
[Samsung Galaxy Nexus] Drzfr3shboialex:
I had the purple screen when I got my white galaxy nexus from amazon. I rooted it and installed aokp build 39, and oddly and thankfully isn't there in the lowest setting. I also have trinity

Sent from my Aokp'd Nexus Prime
[Samsung Galaxy Nexus] gaara.awp:
Yea, heard B39 has some color settings that fixes the purple tint but in that case you'd have to use the kernel that comes with the rom. if one's planning to use custom kernel (myself) than that would be of no use unless the kernel has that option.

For me, The Spice Melange option in Trinity gives me the best colors. It was a little blue-ish in the beginning but got used to it and its amazing now. It does not fix the grainy issue although it can be improved by turning "content adaptive brightness"off in voodoo display app. the apk is free.

---------- Post added at 01:10 AM ---------- Previous post was at 01:01 AM ----------

The grain is still there. Guess its the screen technology and it cannot be fixed, not sure though. If you install voodoo dispaly and turn the "content adaptive display" off then you'll see a slight improvement but its still there. for white colors, the diplay dims a bit more showing more grains and the dimming of the display while showing white colors can be turned off with this app thus showing less grains. this is what i think. im not aware if there are such features in some custom roms.

---------- Post added at 01:35 AM ---------- Previous post was at 01:10 AM ----------

Some say they have a color profiles option in AOKP B39, if you are wiling to.
[Samsung Galaxy Nexus] annie42:
Where do you find the voodoo display app?
[Samsung Galaxy Nexus] :
Hi,

Here:http://xdaforums.com/showpost.php?p=24783215&postcount=110

:)
[Samsung Galaxy Nexus] koax88:
ive found a quick fix or should we call bandaid? for purple tint issue, can use this with franco kernel..on lowest brightness the purple greatly reduced..:)

1.flash this mod

http://xdaforums.com/showthread.php?t=1673920

2.using root explorer, go into trickster directory,and edit color.conf

3.set to trinity color, scroll on the bottom, gamma setting, set it to 4

4.profit??

its working with any color preset, but i like trinity color more, franco too warm, trickster too blue, trinity abit red but its more to white, anyway, we can adjust the multiplier to our liking..:)
[Samsung Galaxy Nexus] arzbhatia:
For me, it's too greenish using the Trinity options :(
[Samsung Galaxy Nexus] koax88:
yes, after a while i noticed that too, and the color less punchy too..but what else can we do to get rid of the purple..:crying:
[Samsung Galaxy Nexus] gaara.awp:
Did you change the color multipliers and see ? If you take a screenshot of it and see, the greys( say the power control widget) are not actually grey but kind of dark greenish- grey.

For me "The Spice Melange"option gives me an amazing display i.e

contrast: -24

red: 135

green: 135

blue: 215

Its a little blue in the beginning but give it some time and you'll get used to it. Its amazing.

---------- Post added at 10:56 AM ---------- Previous post was at 10:47 AM ----------

A question:

It says:

"Following features are dependent on kernel features:

- Color (applied by default), contrast and gamma tweaks"

So if it depends on kernel features, can we still change the contrast using franco, because there's no such option in franco's app.
[Samsung Galaxy Nexus] arzbhatia:
I'm too used to the settings I use on franco.

Go to settings > ROM Control / Your ROMs panel > Color Settings > Set everything on default but set the blue multiplier to 0.1 value less then red and green.

Then get into franco > Set multipliers as -

R : 200

G : 200

B : 250

OMAP Gamma : 1.4

The screen is SO outstanding above 30% in this.
[Samsung Galaxy Nexus] arzbhatia:
Fixed my screen :)

See, the trick is. Do a fresh install of whatever ROM you're using. (I'm on LiquidSmooth) Don't mess with the color options available in the ROM control settings or whatever.

Then download the latest Franco kernel. Get into franco's app (buy it if you dont have it, its worth it), get into color control tab and set the values to this -

Color multipliers -

Red - 200

Green - 200

Blue - 265

Gamma -

Red - 6

Green - 0

Blue - 8

OMAP4 Gamma Interface -

1.0

These values are AMAZING. All thanks to morfic for encouraging franco to add the contrast *something* option into his ROM.

OH AND ALSO, FLASH THIS - http://xdaforums.com/showthread.php?t=1588613

Best of luck!
[Samsung Galaxy Nexus] gaara.awp:
These values work for me as well. For the gamma, i'm using 4 for red and 6 for blue though. All seems good. :) Trinity options also worked for me, but it makes the whole screen a bit dimmer due to the low multiplier values (135). Trinity doesnt give the option to go beyong 214 for color multipliers.

200, 200 and 280 works for me, no purple tint (if there, ever so slightly, much better than before, i must say) and overall a bright display.
[Samsung Galaxy Nexus] osm0sis:
200 200 280, 10 0 10, -24 contrast, 0 omap for me. Looks damn near perfect! FINALLY!

Now to install Script Manager and see if turning off adaptive content brightness helps the graininess :D

Edit: And so it does, a bit!:good: Also, 10 0 10 is starting to feel a little too reddish, trying 2 0 10 now.

Edit 2: VERY happy with 2 0 10. Looks great on Automatic, low and half brightness. Full reveals a little bit of a blue tint where the purple used to be, but otherwise it's perfect. Yellowing is virtually gone, nice looking gradients and with ACB off whites are brilliant and text is crisp at all brightness levels! I'm ecstatic! :laugh:
[Samsung Galaxy Nexus] penskyc:
New Nexus

Got a new nexus today from play store, cracked the screen on my old one. It had a purple tint right out of the box, I was used to the grainy look i had with the old one, but did not really have any kind of purple, i took some pics, on the phone with google right now he is putting it in as a DOA and samsung is going to advance me a new one. he was shocked by the pics, as was I. I am running jellybean, so asside from running francos kernel (which I am) i cannot try anything but those color controls.. which have not worked, even with all the different number options in the forum

https://plus.google.com/photos/109141499688656742016/albums/5759500601816653793
[Samsung Galaxy Nexus] pl3nty:
Very nice comparison pics.. but damn. I had been thinking of upgrading to a GNex so I can stay on top of Android updates, but I really don't know if I'm prepared to take the risk given the high percentage of bad screens coming out of the factory - and it's not like they haven't had months since the launch to try and get it right.

Samsung really needs to either tighten up its quality assurance level or just stop making these flawed screens altogether. If this phone had an IPS panel like my Optimus2x I'd already own one.
[Samsung Galaxy Nexus] penskyc:
Hmm, yess I am quoting my self, Just wanted to mention wiht the update of franco kernel update app, he added Trinity contrast interface, put mine on -24 and it looks beautiful, all purple is gone!
[Samsung Galaxy Nexus] alangrig:
Please advise release date of ur Gnexus? (FYI:under battery 4th and 5th letters in serial number, like C1 or C2...)

thanx
[Samsung Galaxy Nexus] penskyc:
it is a c2
[Samsung Galaxy Nexus] alangrig:
Thnx.

Gnexus user from 4pda.ru already seen and tested C5 May 2012 Gnexus release and seems that all issues regarding screen quality:color calibration, tint uniformity and graininess were resolved. However mine is C1 and no issues were detected with screen: no purple, no graininess or black spots. Screen is just awesome.
[Samsung Galaxy Nexus] coldrazor:
-24 contrast simple stunning

Enviado desde mi Galaxy Nexus usando Tapatalk 2
[Samsung Galaxy Nexus] arzbhatia:
Wow! yours condition is PATHETIC.
[Samsung Galaxy Nexus] ÜBER™:
In fixed my purple tint finally with the screen contrast deal.

Just a little comparison

the one before screen contrast

And after
[Samsung Galaxy Nexus] marcusva79:
Uber share your settings man. I can get good.
[Samsung Galaxy Nexus] ÜBER™:
Screen contrast is as low as it will go.

Oh and trinity is different than Franco colors... just so you know.
[Samsung Galaxy Nexus] badsubby:
Hi,

I got my nexus today and notice slight tint only at 1% brightness. I called Google and they said that that's the screen technology. That's their version but when I'm at 5% everything looks grey like it should be. My main concern is the graininess. I have no way to gauge how sharp the screen must be. Mine looks fine but a person with keen eyes like mine can spot pixels of Gmail app logo for example. Is that normal from a distance of 5-6 inches? The reason I ask is that is this the graininess everyone keeps talking about? Also I understand that its not as sharp as iPhone given that it is 1 inch bigger with a few hundred additional pixels. Thanks.

Also the white background feels like there is a redness to it in the upper part of the screen. Any input will be greatly appreciated.
[Samsung Galaxy Nexus] arzbhatia:
Your screen is 80% fine but the redness you're talking about doesn't sound good. Is it just on the upper part? If yes, your screen is bleeding :O
[Samsung Galaxy Nexus] Toad858:
So whats the general consensus on the screen graininess? I just got my gnex from the play store on Friday and the display looks great except the graininess on whites and greys. The pics from uber show exactly what I am talking about. Is this the norm for pentile superAMOLED HD displays? Any thoughts?
[Samsung Galaxy Nexus] badsubby:
It feels like its in the top middle and not from the edges or anything. Graininess is what im trying to figure out now. Looking at the verizon gnex on display today mine is fairly similar but it had a more smooth feel to the eyes. I dont know. Only if there was an easy way to compare the graininess.
[Samsung Galaxy Nexus] Arcadia310:
I just got a Nexus from the Play Store and I noticed the purple immediately on the first set up screen. This is utterly ridiculous, but what do you expect from a $350 phone? They have to cut corners somewhere.
[Samsung Galaxy Nexus] arzbhatia:
Can someone who got a replacement forward me what you wrote to convince them (google/samsung) for a replacement?
[Samsung Galaxy Nexus] frankied22:
I just got my Nexus today and when I tilt the screen even the slightest there is a horrendous blue tint across the whole screen. Its really disappointing :(
[Samsung Galaxy Nexus] arzbhatia:
I'm trying to convince Samsung to get me a replacement >.<
[Samsung Galaxy Nexus] alexkelly:
I called samsung and they said kogan (website i bought it) could replace it.

I accidentely mentioned something to kogan about franco colours now they wont replace it because they have guessed I rooted it. Great. I got this less than a week ago and my greys are absolutely horrible. -24 contrast doesn't even fix the purple crap.
[Samsung Galaxy Nexus] arzbhatia:
Umm, say I used franco kernel on my friend's device or something blah blah.

Did anyone manage to fix the grain?
[Samsung Galaxy Nexus] ÜBER™:
Lol I just realized this grain.... After fixing the purple tint.... What kind of sick joke is this huh samsung.
[Samsung Galaxy Nexus] badsubby:
What is this graininess everyone keeps talking about? The only graininess taht I would consider graininess is when in settings there is that gradient and the bottom it is grainy due to that color gradient. Is that it?
[Samsung Galaxy Nexus] ÜBER™:
No on lowest setting of brightness open the browser and load the Google page and look at the grain on the white background.
[Samsung Galaxy Nexus] Toad858:
The pics that uber posted a few pages back show what we are talking about. The graininess is perfectly visible in those pics
[Samsung Galaxy Nexus] osm0sis:
I haven't seen graininess since I disabled Content Adaptive Brightness. :D:good:
[Samsung Galaxy Nexus] badsubby:
Oh yeah I've seen that. But i'm never gonna be at the absolute lowest because i'm going to use the power widget and that never brings it down to 1%. Purple tint is a big deal for me but that doesnt bother me as much. I do agree that when paying almost as much as for a laptop the quality should be higher. As far as I know Samsung's argument is that at the lowest brightness the technology is built that way to conserve power.
[Samsung Galaxy Nexus] arzbhatia:
What did you do to turn it off? Did you use Franco's app?

Well that's lame :-/

Arz
[Samsung Galaxy Nexus] ÜBER™:
Trinity kernel app has it. Also the voodoo color experiment has it.
[Samsung Galaxy Nexus] negrobembon:
Actually i can only see that grayniness and a little bit of purple on the very lowest brightness settings any other and the screen is perfect

Though the auto brightness is very aggresive so its always at the lowest in my case but i dont mind it

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] alexkelly:
So what's the best way to fix purple tint right now?

I'm on -34 contrast using trinity toolbox and it's still there -.-

hulpppp

cheapest screen repair i found was $250 ugh.
[Samsung Galaxy Nexus] osm0sis:
Franco's app has it since 5.6 as well. Or you could just do an init.d script with

echo 0 > /sys/class/backlight/s6e8aa0/acl_set

:D
[Samsung Galaxy Nexus] ÜBER™:
Wow really? Should have gone away maybe you need to up the contrast? I dunno you must have a really bad one.
[Samsung Galaxy Nexus] ÜBER™:
I didn't see when I used... either way.. ;)
[Samsung Galaxy Nexus] marcusva79:
Tried out the Trinity kernel and I still get the ugly grain. My screen is bad. They only kernel that has helped me out has been Francos. thanks for the UBER
[Samsung Galaxy Nexus] penskyc:
Just got my Advanced replacement, apprears to be a brand new phone still with the seal sticker on it. I opened the back up and noticed it is again a C2, I have not turned it on, but im not really that hopeful, though I am sure it will be better than what I had.

Update, only starts to get purple below 30% its not purple at 100 like the other one, so Ill take it.!
[Samsung Galaxy Nexus] Serious_Beans:
I'm upset Samsung isn't using their better fabrication/calibrating process on the Galaxy Nexus like they did on the S3. Just got an S3 and the whites aren't grainy even at really low brightness and no purple tint at all. Also the text and icons look a little more sharp. Wish they would do that for the GNex so I can switch back :/
[Samsung Galaxy Nexus] ste1164:
I got a nexus today and it has horrible grain and horizontal & vertical banding. :(
[Samsung Galaxy Nexus] electronixgimp:
just got my nexus omfg awesome phone its got just a tad tad purple and no graininess but it don't bother me looks way better then my vivid and skyrocket also got asked for a ota update and its already on 4.0.4 ??
[Samsung Galaxy Nexus] alexkelly:
I'm just going to replace my whole screen.

It sucks that this is so common. Buy a cheap screen from ebay if you know how to do it yourself.
[Samsung Galaxy Nexus] jfroehlich:
While it is still under warranty? Why?
[Samsung Galaxy Nexus] vkamicht:
Add another one to the list... ordered mine on June 29th, got it yesterday, already have my UPS return label waiting for me in my inbox. Even at full brightness, the top of menus (settings, etc) is purple instead of dark grey/black. At minimum brightness the entire screen suddenly takes on a disgusting tint. I think I know why the phone costs $350. :rolleyes:

I didn't even bother trying to get a replacement from Samsung, but I am willing to try it again after they start selling the ones preloaded with Jelly Bean. Really wanted this phone. Still do!

Also I did notice the "grain" effect, but that didn't bother me nearly as much as the color.
[Samsung Galaxy Nexus] alexkelly:
Well people are saying they can't convince samsung it's broken.

And people like me who have voided it. Which is most
[Samsung Galaxy Nexus] jfroehlich:
Actually for $350 I think the screen should be perfect. At $200 my Galaxy Exhibit (Exhibit II) had excellent color at all brightness levels.
[Samsung Galaxy Nexus] jfroehlich:
Strange. I had no problem. Just told them grays were showing as purple, overall was very grainy, and contrast was poor. Told them I took screen captures and viewed them on my laptop to confirm the colors were wrong. I figured I would have to send them my images and pics of the phone, but they just set me up with an advanced replacement. I called on the 4th... not sure whether that would make a difference.
[Samsung Galaxy Nexus] alexkelly:
Hmm yeah, where did you buy it? I bought it from kogan.com and they are telling me they won't replace it because earlier i hadn't really noticed the purple and asked them what the unlock code was and mentioned i was running franco and asked if it would have anything to do with it ahh stupid mistake. Do you think I could go straight to samsung and get them to replace it?
[Samsung Galaxy Nexus] jfroehlich:
I got it on the play store.

If you just got it kogan must have a return/exchange policy. Perhaps if you talk to a different rep and leave out the other stuff they will help you.

Otherwise, Samsung is the one providing the 1 year warranty so you should be able to call them. Don't tell what you've tried to fix it, and be sure it has the factory reset stock ROM when you ship it. You'll have to do without it for a couple of weeks while they repair it. Apparently they only provide advanced replacement for play store purchases within 14 days of its arrival.
[Samsung Galaxy Nexus] scoobdude:
Read the Magnuson moss act ;)

Sent from my Galaxy Nexus
[Samsung Galaxy Nexus] svtfmook:
My colors are fine, I just have streaks running vertically that are about 1/2" in width.
[Samsung Galaxy Nexus] LancerEVA06:
I had the purple issue too. But after about 2 weeks of using the phone it started looking better. Here it is almost 3 months later and I have no purple/blue tint at all.
[Samsung Galaxy Nexus] masterkamon842:
I don't think that they're gone,i just think you got used to it :P

When i first got my gn i was coming from an HTC one s, and i gotta say the screen difference was the worst part getting used to. This phone looks terrible with low brightness...

What helped a lot for me was trinity kernel which fixes colors and avoiding low brightness settings.
[Samsung Galaxy Nexus] vkamicht:
Agree with this, unless you've taken before & after pictures with the same camera in the same setting/light.
[Samsung Galaxy Nexus] arzbhatia:
Can someone who supposedly fixed the issue please post their CC values?

Arz
[Samsung Galaxy Nexus] alexkelly:
So you couldn't convince samsung?
[Samsung Galaxy Nexus] arzbhatia:
Lol no.

Arz
[Samsung Galaxy Nexus] jfroehlich:
Thanks, but what am I looking for? I'm looking at it now and not seeing what directly relates to my post. Perhaps you could elaborate?
[Samsung Galaxy Nexus] chrisjs81:
Mine was delivered yesterday and of course I have the purple tint issue as well.

I just called the Play Store and they said the purple tint is a known issue but if it's only noticeable below 1/3 brightness it's within manufacturing tolerances.

My screen is worse than that... so they transferred me to Samsung support but unfortunately I ran out of time and couldn't wait on hold, so I'll have to call back.

Those who have gotten an exchange within the 15 days, did you deal only with Google or did you also have to talk to Samsung?

This is kind of ridiculous that the current Nexus-branded flagship device has an acceptable tolerance of purple grays when the screen isn't set to burn your retinas.

My wife has a first gen Galaxy and while its AMOLED has some quirks it's nothing like this.
[Samsung Galaxy Nexus] jfroehlich:
I didn't even call Google. On their support page for the Galaxy Nexus they direct to contact Samsung. I called the number on that page (888) 987-4357 and got immediate assistance from US personnel (on 7/4 no less), and they were very accommodating. Be sure to mention that you purchased it on Google Play store and it is within the first 14 days of delivery so that they give you advanced replacement (they put a hold on your credit card & send a new phone to you, then you send yours back to them, all on their dime). After the 14 day period you have to send them your phone for repair, but they still pay for shipping.
[Samsung Galaxy Nexus] chrisjs81:
Thanks I'll call them in the morning. How did your replacement turn out? Arrive yet? Still purple?
[Samsung Galaxy Nexus] jfroehlich:
Just got the tracking number today... it will arrive Monday.
[Samsung Galaxy Nexus] Geo411m:
I just got my new Nexus today and my screen doesn't have any of these problems everyone keeps talking about or perhaps I'm a bit color blind. Either way ignorance is bliss.
[Samsung Galaxy Nexus] fineazbro:
got mine today there is a big line on the bottom right on the of the soft key they do not go away no matter what i do.im sending it back i wont even bother ask for replacement since i see all of you guys have problems with this phone, ill just the money to buy a different phone
[Samsung Galaxy Nexus] frankied22:
Mine looks alright unless I don't look at it straight on. Then it looks like a blue world.