Develop Bugs

Gradient Banding on my G2 - need help!

A while back I opened my phone to fix a few other things which was actually successful (power button, touch digitizer, in ear speaker volume).
But when I reassembled my phone, I powered it on and I noticed that the colors were dull on my lcd, with noticable banding in gradients that were black grey white. This occurs in everything that appears on my screen including videos; even pictures that I take on the phones camera after they are tranferred onto my mac - still have banding!
So I thought that it must be something to do with the phones lcd screen? And its not able to transition from gradient to gradient in objects, which is causing the banding.
Anyone ever heard of this being a problem? Any solutions? Even ideas that can help me figure out how this whole thing works.
Appreciate it.
The first two pics, you can see how they have a blue tone to them, and that's the same thing I see on my homescreen/videos.
The second pic is a normal gradient. If this were to be viewed on my phone, in the white/lighter areas of the gradient there would be pink/blue banding. Only the black to white gradient shows the banding, but other colors are still quite vivid such as reds, oranges, yellows, even green. But I do know that it has something to do with light and shading with respect to lcd coloring.
By the way, screenshots of my home screen or any other screen using ShootMe are normal without banding.
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bump...ahhhhhh

Guess taking it apart didn't work as well as you thought
Sent from my T-Mobile G2 using XDA Premium App

I get banding in wallpapers with gradients on my G2, regardless of color. Although it's much easier to see on black/white/gray type gradients. I figure it's just a limitation of the LCD to accurately reproduce said gradients because if I view the same images on my PC monitor the banding isn't present.

dhilberg said:
I get banding in wallpapers with gradients on my G2, regardless of color. Although it's much easier to see on black/white/gray type gradients. I figure it's just a limitation of the LCD to accurately reproduce said gradients because if I view the same images on my PC monitor the banding isn't present.
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Hmm yeah, I get it in everything. Themes, videos, pictures, etc. It seems like there is a color limitation, its annoying.

TheToiletSpaula said:
Hmm yeah, I get it in everything. Themes, videos, pictures, etc. It seems like there is a color limitation, its annoying.
Click to expand...
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Did a bunch of Googling, came up with this:
http://www.reddit.com/r/Android/com...rs/?utm_source=twitterfeed&utm_medium=twitter
Long story short, use the Wallpaper Set and Save app from the Market to apply your wallpapers. For some reason it fixes the banding. Tried it myself, it works. Doesn't solve the problems with your video, etc. though.
So obviously the LCD is perfectly capable of displaying images without the gradient banding. My guess is when the gallery is used to set wallpapers the images go through some sort of compression process.
EDIT: Looks like the gallery (Gallery 3D in my case) is the cause of the problem. I tried QuickPic too but it displays banding as well.
EDIT 2: Actually I was mistaken. QuickPic doesn't display banding.
What seems to happen is that when you select an image to set as a wallpaper with Gallery 3D, it saves a copy of it and sets that copy as the actual wallpaper. The copy is compressed, which is what causes the banding. Both QuickPic and Wallpaper Set and Save do not create a copy of the wallpaper, hence why there's no banding. Looks like it's bye bye Gallery 3D.
Thanks for bringing this up, something that's bothered me for a while but never bothered to deal with it.

Yeah im going to continue to try and figure this out. If the Wallpaper Set and Save app can fix the wallpapers that means there must be some sort of calibration that can be done to draw out normal colors from your lcd.
The thing is...the black and white gradients that are affected are part of most images especially videos since gradients are transitioning all the time as the image moves.
There has to be sometihng that can fix this gradient transitioning problem for the black and white shades.
Thats where im at. :S.

Update:
I applied the above black to white gradient pic as my background using Wallpaper Set and Save to use as a test to whether it would get rid of the banding and...
IT DID NOT WORK.
My LCD still displays pink/blue banding along the transition from black to white. It must be some sort of damage that my phone sustained possibly though the 1. LCD screen connections to PCB, 2. The PCB circuits (under the shields), 3. Or the Flex Cable.
****, I need some ideas on how I can fix this...

Indeed, you might have some damage.
I downloaded your black to white gradient image and set it as my wallpaper with both Wallpaper Set and Save and QuickPic. Both times no gradients or color banding was present.
Sent from my G2 using XDA Premium App

Pink stripe down middle of screen

On my E4GT, when I turn the display brightness really low with my ScreenDim app, and then look at something (e.g., a PDF file) which fills the screen with a white background (and black text), while being in a dark room, I can see that the middle third of the screen is slightly pinkish, forming a pinkish vertical stripe, instead of white.
Does anyone else have the issue? If you want to try to see if yours has the issue, you can use ScreenFilter and turn the brightness really low, or you can use the free ScreenDim Trial and set to 25% or a bit lower (in Easy Mode). I'm wondering if I should return the phone to the store, or if they're all like this.

Does the lack of replies mean that I am the only one having the problem?

arpruss said:
Does the lack of replies mean that I am the only one having the problem?
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LOL, good for you for being persistent AR.
I tested this for you on mine and I'd say mine is a little over half on the left side as what you described.
Edit: Title is a little misleading but your initial comment about the whole left side of the screen seems to be correct.

Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.

eeeeeeeeek said:
Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.
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This is something you wouldn't normally see in a stock scenario. The lighting app allows for drawing the screen down below 25% and the discoloration is very faint. I wouldn't probably have even noticed it unless I was asked specifically to look for it.
I don't think AR was pointing it out as a problem. He was probably just curious if anyone else could duplicate it using the same setup (well, and to make sure he wasn't really having an issue too I suppose ).

ee[LEFT said:
[/LEFT]eeeeeeek;26299088]Sounds like a symptom of the application. I have not seen a single et4g with a pink line/screen come through my service and repair centers.
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Click to collapse
No, I don't think it's a software problem. The app lowers screen brightness to the lowest level allowed by the OS and then draws a light gray overlay over the screen. The device isn't rooted and the app uses standard documented apis. None of this should produce a nonuniform effect like this stripe. In theory, the same issue should come up if one turns the brightness to a minimum with the OS settings and them loads a light gray image. I'll see if I can produce it.
Also, you only see the effect well if you are in a quite dark room. But since I like to read in the dark, this matters to me. If all units have this, I'll live with it. But if it's only mine, I want it to be fixed.
This issue is one of the reasons I haven't rooted: I may need to return the unit.

You are right. I would want to know if it is my phone or not before I make a decision to have it replaced. What if the replacement phone not only has the same issue, but a couple of new ones as well?

Here's a test that doesn't require any special app.
Turn off automatic brightness and set brightness to minimum.
Then view this test image with the browser
http://pruss.mobi/test/A0.jpg
Zoom until it fills the screen. Go into a dark closet or other windowless room without lights. View the screen from different angles. To me, the discoloration is most visible if I view it in portrait mode, straight on. It disappears if I tilt the screen side-to-side a bit. Here is an attached copy:
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Here are some other test images. For me, the above one showed the discoloration best, but it might be different for different people.
http://pruss.mobi/test/70.jpg
http://pruss.mobi/test/80.jpg
http://pruss.mobi/test/90.jpg
http://pruss.mobi/test/B0.jpg
http://pruss.mobi/test/C0.jpg
http://pruss.mobi/test/D0.jpg
http://pruss.mobi/test/E0.jpg
The images are all solid gray.
Here's a QR code for the A0 image:

Hi AR. I tried it out again but I still do not have a line down the screen. I tried several screen brightness levels all the way to 0% where I could barely see the grey and still no line for me. Hope this helps and hopefully someone else will try it for you too.

tdunham said:
Hi AR. I tried it out again but I still do not have a line down the screen. I tried several screen brightness levels all the way to 0% where I could barely see the grey and still no line for me. Hope this helps and hopefully someone else will try it for you too.
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The other issue my screen has is that if I view a 100% black image, and go into a very dark area (when I tested this most thoroughly, I was in a closed, windowless garage at night), and let my eyes get adjusted to the dark, eventually (after a bit of dark adaptation) I see an gray glow from the screen, with many irregular small patches that are completely black peeking out of the grayness. This is a very small aberration, but it is noticeable when outside at night running an astronomy app.

Interestingly, after a couple of months the problem seems to have decreased. Or my brain is screening it out.

Camera issues: Circle-Ring in the middle - anyone came accross this?

So I have few issues with the camera. All in this album. Sorry if its already
reported.
2. This I noticed by accident. It actually doesn't show well on the original picture 7 picture in the above posted album. But I noticed that circle to be present in the preview everywhere even if very very very difficult to spot. And you need to have really good eyes to see it. However when saving the pic, the circle vanishes a little, but with little tinkering I was able to make it show. In the album is the original also to see. I tried another applications like ZoomFx or Camera ICS, and they didnt show this circle in the preview. I do not want to experiment with the pics taken from them so I can think this is just the original camera issue.
HOW TO: Just open the HTC Camera app, and look on the screen, right in the middle, and focus on near objects, hand, wall, 10-20-30-40 cm away, the ring shape should reveal itself when moving the phone. You should notice the shape always the same.
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1. I had no effect on. And I wasn't reproduce this since (also didn't do so many pics since as well) Is this some effect or an issue?
3.
How to get rid of the pinkish, violet hue? When changing it to daylight its too much yellow. You can see how it should look like in the picture nr. 2 in the album. I took that picture (2), I focused on the tree/sun up , moved the cam quickly down and took the picture before it changed to the pink like you can see on this pic.
Thanks for any help.

I have seen that also on a few occasions, I have except once noticed the problem and closed the camera app and reloaded it and it solved the issue. Only once has the image saved like that.

noisy_lightning said:
I have seen that also on a few occasions, I have except once noticed the problem and closed the camera app and reloaded it and it solved the issue. Only once has the image saved like that.
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Which of the issues ? 1.2.3 ?
That 1. might be temporary 3. might be solved by settings I hope
but the 2. seems to be strange. Also I have the feeling its not only mine HOX having this. It was really hard to spot. But its present everywhere, even if extremely hard to spot.
Next week I will check out 3 other HOXes to see if its there as well.

Issue 1 only, not the other two.

noisy_lightning said:
Issue 1 only, not the other two.
Click to expand...
Click to collapse
Kinda think that the 2 is actually and as I wrote up, more ppl will have it.
Can you try what I wrote? Just make the camera on, try to look on near objects through it. your hand, wall, table, something red-yellow, when you see a shape that's not changing and its staying always in the middle.
Best to make the grid option on, and it will be directly in the middle grid quadrant.
Its big so it fills it out actually, so not needed to look for something tiny 1mm.

Last bump.
I still think, many can see the 2 if they try. Would like someone who could explain or address this.

I have experienced 2 once, I am sure this is a software related bug.
Sent from my HTC One X using xda app-developers app

hokoonho said:
I have experienced 2 once, I am sure this is a software related bug.
Sent from my HTC One X using xda app-developers app
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I would say you don't "experience" this, you might "notice" this once. I believe its always there, maybe the software just filters it out to some extent but on some pics it will be visible nevertheless. Btw as I said the 2 I had to filter, edit till I could make the shape visible like that.

Unrealistic colors for Movie/TV viewing... any way to calibrate?

Coming from a professionally calibrated plasma TV, I find the colors very unrealistic when using the Tab S for movie / TV viewing. The colors are way too intense / overblown, and peoples faces appear too pink/red. Is there any way to fix this?

romnation said:
Coming from a professionally calibrated plasma TV, I find the colors very unrealistic when using the Tab S for movie / TV viewing. The colors are way too intense / overblown, and peoples faces appear too pink/red. Is there any way to fix this?
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Click to collapse
Have you not tried switching display modes?
I find basic mode to be the most realistic, the colours are nowhere near as saturated and much more natural.

I've tried cinema mode. It works for me.

Make sure Reading Mode is not on.

There is a way to calibrate the screen, but for now it involves building kernel from source. I was doing it back on my GT-P6800.
If someone more skilled in kernel patching would make a sysfs interface for that.

romnation said:
Coming from a professionally calibrated plasma TV, I find the colors very unrealistic when using the Tab S for movie / TV viewing. The colors are way too intense / overblown, and peoples faces appear too pink/red. Is there any way to fix this?
Click to expand...
Click to collapse
heyjoe66 said:
There is a way to calibrate the screen, but for now it involves building kernel from source. I was doing it back on my GT-P6800.
If someone more skilled in kernel patching would make a sysfs interface for that.
Click to expand...
Click to collapse
I have the 10.5 and am praying someone makes a basic kernel that allows this. The tablet just has a nasty orange/greenish tint when showing human skin. It's the only thing about the tablet I don't like and tried getting used to but can't. Watching videoe, looking at pictures, it's very annoying and forget about editing photos on the tablet, with this tint it's so hard to judge colors that I can't edit raw files using photomate r2 anymore because I end up compensating for the tablets natural tint that the edited pics look ok on the tablet but lacks greens everywhere else.
Anyhow, I'm rambling, but praying for a kernel that allows us to edit the screen tint in synapse!

romnation said:
Coming from a professionally calibrated plasma TV, I find the colors very unrealistic when using the Tab S for movie / TV viewing. The colors are way too intense / overblown, and peoples faces appear too pink/red. Is there any way to fix this?
Click to expand...
Click to collapse
toyanucci said:
I have the 10.5 and am praying someone makes a basic kernel that allows this. The tablet just has a nasty orange/greenish tint when showing human skin. It's the only thing about the tablet I don't like and tried getting used to but can't. Watching videoe, looking at pictures, it's very annoying and forget about editing photos on the tablet, with this tint it's so hard to judge colors that I can't edit raw files using photomate r2 anymore because I end up compensating for the tablets natural tint that the edited pics look ok on the tablet but lacks greens everywhere else.
Anyhow, I'm rambling, but praying for a kernel that allows us to edit the screen tint in synapse!
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Click to collapse
Found one more screen mode in Accessibility settings AMOLED Cinema (standard), but a bit less contrast.
To try it you can go to Settings > Accessibility > Vision > Color adjustment
Now you'll be offered to sort some color tiles. If you place them correct, it'll say that 'color adjustment unnecessary', but if you switch couple of them, it'll enable color adjustment. It looks like some hue shift, not too much use for healthy vision, but you can turn the 'Color adjustment' slider down and will have that less contrast mode.
Please check it and say, what you think.

heyjoe66 said:
Found one more screen mode in Accessibility settings AMOLED Cinema (standard), but a bit less contrast.
To try it you can go to Settings > Accessibility > Vision > Color adjustment
Now you'll be offered to sort some color tiles. If you place them correct, it'll say that 'color adjustment unnecessary', but if you switch couple of them, it'll enable color adjustment. It looks like some hue shift, not too much use for healthy vision, but you can turn the 'Color adjustment' slider down and will have that less contrast mode.
Please check it and say, what you think.
Click to expand...
Click to collapse
You dear sir, has made my tablet experience so much better! Skin tones are now life like and doesn't look completely unnatural. This is a welcomed improvement though it seems to also adjust contrast which I'd rather it not do, but I'm still quite pleased.
Thanks again!

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I've tried a few configurations and have found this to be the best setting, the colors are spot on and look like they do on my MacBook.
Sent from my SM-T800 using Tapatalk

toyanucci said:
I've tried a few configurations and have found this to be the best setting, the colors are spot on and look like they do on my MacBook.
Sent from my SM-T800 using Tapatalk
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Are the whites better?
Sent from my HTC One_M8 using XDA Premium 4 mobile app

Where was the slider at default?.....I sent it back for new one because of black clipping in dark sceens it was like pixelated. Mine it was less saturated so thats good to know if i want more color.. Thanks for the info

toyanucci said:
I've tried a few configurations and have found this to be the best setting, the colors are spot on and look like they do on my MacBook.
Sent from my SM-T800 using Tapatalk
Click to expand...
Click to collapse
By configurations you mean order of that color tiles? Can you remember how did you ordered them and how that affected the image?

Amazing stuff here. Thanks!

Please, have a look here

Went through the the color sorting thing and after I was done it said "Color adjustment is not necessary", so I guess mine was set up right. The only time people ever looked overly orange to me was when I was watching Jersey Shore repeats.

[Request] Daniel Wellington (Facer)

Would anything be willing to make this watch face? I like the simplicity, but elegance of this watch face:
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Sure thing. This should be a couple of minutes only.
Here you go. Looks much nicer on the watch.
http://facerepo.com/app/faces/details/daniel-wellington-14a7af2d22f

Can I request a black background? And, sorry to n00b it, is there a way to set the ambient screen to the a lighter (meaning less bright) version of the watch without the second hand moving? Is that something I can do?
GREAT work man

ret4425 said:
Can I request a black background?
Click to expand...
Click to collapse
The watch is only made with the light background. I can invert the image and desaturate the blue tint, and you'll have a black background with white/grey markers and text. What I will not do is recreate/photoshop out all the markers and just replace the background with black and keep the markers in gold, as that is way way more work than your original request. If you're ok with the black/white look, I can easily do that.
ret4425 said:
And, sorry to n00b it, is there a way to set the ambient screen to the a lighter (meaning less bright) version of the watch without the second hand moving?
Click to expand...
Click to collapse
There is no second hand on my watch, as the original DW doesn't have it either, neither does the image on your OP. It's only hour and minute. As far as changing the image when it's dimmed, it's just a matter of duplicating the layer, changing the opacity and setting that to show when dimmed, and setting the original layer not to show when dimmed.
I'm not entirely sure if you're talking to me thinking of this:
http://forum.xda-developers.com/moto-360/themes-apps/daniel-wellington-watchface-t2982668
or thinking of these:
http://facerepo.com/app/faces/details/daniel-wellington-classic-black-date-plus-14a7ca2ac1e
http://facerepo.com/app/faces/details/daniel-wellington-classic-silver-date-14a7c79b209
All three of those somehow, magically, appeared online after I created mine based on your request.
If none of those three are what you want, I can modify the one I made. But I don't want to waste my time, so check those out and let me know.

Thanks, I will try and muddle through the settings. Still very new to this. I am using Watchmaker, and will play around.
There are some of the watches I like, but I use ambient setting, and for some the watch face disappears and only the hands remain. Others have a second hand that freezes in ambient mode, then jumps around when it activates fully.
If that even makes sense.
Thanks for all the work, you do a phenomenal job.

Max_Pain said:
Sure thing. This should be a couple of minutes only.
Here you go. Looks much nicer on the watch.
http://facerepo.com/app/faces/details/daniel-wellington-14a7af2d22f
Click to expand...
Click to collapse
Thanks! I ran into the issue where 4 Pm appears as 8 pm on my watch. Bug?

I think it's because this watch face lacks 12 hour time support. Any way to add this in? Thanks

Watch Face does not lack 12 hour support. It's using the standard tag. You can also just change that yourself in Facer by opening the layer for the hour hand and changing the rotation tag.

Max_Pain said:
Sure thing. This should be a couple of minutes only.
Here you go. Looks much nicer on the watch.
http://facerepo.com/app/faces/details/daniel-wellington-14a7af2d22f
Click to expand...
Click to collapse
Hi, I love this face, but it keeps displaying the wrong time. Sometimes it shows it like 8 hours out but currently it's not moving the hour hand with minutes, just staying exactly on the hour.
Anyone / @Max_Pain have any idea?
Edit: in fact, the hour hand is stuck at 12.
Sent from my HTC One using XDA Free mobile app

Redownload:
http://facerepo.com/app/faces/details/daniel-wellington-14a7af2d22f
I changed the tags to the correct ones now.

Max_Pain said:
Redownload:
http://facerepo.com/app/faces/details/daniel-wellington-14a7af2d22f
I changed the tags to the correct ones now.
Click to expand...
Click to collapse
Thank you very much. This is my favourite watch face. I was stuck between moto 360 and the DW so that's sorted me out!
Sent from my HTC One using XDA Free mobile app