I've got a D801 (T-Mobile) and over the past month or so, I've been experiencing pretty severe graphical artifacts. It usually consists of multiple purple and green horizontal lines, about a pixel wide, all over the screen (on both the image and any accompanying text content). It is often accompanied by flickering and occasionally by screen smearing. The artifacts occur only when viewing static image content - photos, web pages with photos, apps that include pictures, background images on the lock screen - I've had no problems when playing games. It's not consistent - it only occurs maybe 30% of the time - and it's not limited to specific apps. The artifacting will also disappear if I'm on a web page and scroll past the image. I doubt this is fixable - my gut instinct is that it's a hardware problem - but I figured I'd ask here to see if anyone has a solution. I really like my G2 and am not a big fan of any of the options currently available to replace it.
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Just wondering if anyone else is seeing this same problem. When on a white screen like a Google search or aldiko, where the text is displayed portrait mode to the left and right of where text is displayed there are like faint bleed lines where the text is displayed. I tried with brightness all the way up and for the most part they go away but around 50% brightness if you look closely I can see it. Do any of you see the same thing. Just wondering if the amoled screens are like that the Samsung behold II is like that. But godly enoguh in landscape I don't see it. Just portrait. Just hoping nothing is wrong with my cool new phone.
Here are 2 pix of what I see
http://tauruspc.net/pix/1.jpg
http://tauruspc.net/pix/2.jpg
And a better one. Just look to the left and right
http://tauruspc.net/pix/3.jpg
I *JUST* answered your question on google support lol
I have the same thing but mine is definatly not that easy to see.
I just checked and i cant see what youre talkin about so i guess my answer is no
Talk about ironic timing. Weird will look then. And the weird thing is on xda page I don't see in Google support I do. LOL.
Also, I am using Dolphin Browser not default so that may be in play I'm not sure, try downloading it and see if you have the same problem maybe.
Yeh I will do that mainly seems with just black on white portrait mode like Google support. Not xda though.
Wonder if it has to do with power consumption. It takes more power to display white pixels. With the black on the same line maybe those lines with text are consuming less power on the line making the rest of the LEDs on that line of the matrix receive more power, making them brighter?
I tried for about 10 minutes to make that as unconfusing as possible lol
Makes sense. Weird only on portrait not landscape. but just spoke with HTC and they say that haven't heard of any problems like that and can send this in get a problems like that and can send this in get a temp one while they fix it and then switch around again
haven't seen much improvement setting manual brightness either.
I get the same thing, I think it is simply a scaling artifact. When you double tap to zoom the lines are no longer visible.
You can see this effect in the boot loader, but only adjacent (the right of) to where there is text at the left. if you look down where there is no text, and just white space, the ghosting lines across the white are not present.
either way, doesn't really bother me, you really have to look for them to see them.
Yeh double checking I see it there too. So yeh just not me then. Probably just amoled tech. the kind of blinky static lines is what bugs me. Don't happen that often and still kind of have to look to see those but since I have been using heavily since I got it about every 4- 5 hours I see where it gets like static lines horizontally about one pixel think blinky faintly in random spots all over the screen but kindof like static or noise from chip shielding or bad power frequency.
I started to get very annoyed with this problem.
When I use opera, and enter a web page with lots of images (eg. lifehacker.com), I can't seem to zoom in enough to have clear, NON-choppy, images. It seems like the more I zoom pass the double-tap, images just gets worse and more pixellated.
Is there something I am doing wrong? Is there a fix to this?
I've applied the tweak where I can see whole webpages instead of "zoomed-in" versions that came stock.
Don't know if this is the problem causer.
AFAIK, double-tap sets "zoom level" to 100% (1 image pixel= 1 screen pixel), any more is enlarging and inevitably leading to choppy images.
EDIT: Actually, double-tap seems to already be more than 100%, a 200pix wide image on my gallery is rendered as 350 pixels on screen after a double-tap.
Hi just got the phone and it really is amazing. first thing I can't help moving the screen quite close to my face and noticing the individual leds making all text look kinda fuzzy, is this the same for everyone. e.g. the black lines around text appear to have red dots running around them.
Also can the youtube player play hd content as it doesn't seem to look hd (especially next to my colleges iphone 4 - danm him lol)
The fuzzy text or screen door effect is caused by the PenTile Matrix. You really have to use the advantage of Chrome lite to make reading more pleasant. While it's possible to read text while fully zoomed out, it will not be as crisp as the iPhone 4's display at a zoomed out level.
Instead what you should do is zoom in a little and double-tap on the text. Chrome lite will re-flow the text so you only have to scroll vertically.
In the youtube player, the videos will default to lower quality. While the video is playing, you have to go to the menu, choose "more" and select High Quality mode.
That should alleviate it.
Hi thanks for your reply,
I have sen youtube to high quality but it still doesn't look hd to me, is it just me expecting too much or does anyone else agree it doesnt look hd?
Agree on the youtube issue. Definitely not HD.
I also tried the "Youtube HD" update from the Evo rom. Looks like it just replaces the menu quality option with a HQ bottom in the lower right corner, but looks exactly the same as with the stock app in so called HQ mode.
Anyone found a solution?
Ok this is kinda bugging the me to no end. Nothing is WRONG with the screen, as this only appears in certain places.
Here's what I mean: When I start up settings, or anything that darkens the background, you can see these lines: http://imgur.com/eCELgov,yPD8mMK#0 in the first image. You would also see ripples only around the jelly beans, but you can only see it in the ES Image Viewer window in the Recent Apps. But when I go back to my homescreen, the lines disappear. And this only happens with certain parts of apps or the settings, as I changed my brightness down to low as possible, and no lines or ripples.
I'm on Rastakat 4.4.2, and this is a recently bought tablet which has been working fine so far.
EDIT: This is probably a way better example: https://www.dropbox.com/s/a3r7gz5wjlwvq92/Screenshot_2014-01-01-17-30-16.png
Duskye said:
Ok this is kinda bugging the me to no end. Nothing is WRONG with the screen, as this only appears in certain places.
Here's what I mean: When I start up settings, or anything that darkens the background, you can see these lines: http://imgur.com/eCELgov,yPD8mMK#0 in the first image. You would also see ripples only around the jelly beans, but you can only see it in the ES Image Viewer window in the Recent Apps. But when I go back to my homescreen, the lines disappear. And this only happens with certain parts of apps or the settings, as I changed my brightness down to low as possible, and no lines or ripples.
I'm on Rastakat 4.4.2, and this is a recently bought tablet which has been working fine so far.
EDIT: This is probably a way better example: https://www.dropbox.com/s/a3r7gz5wjlwvq92/Screenshot_2014-01-01-17-30-16.png
Click to expand...
Click to collapse
Hi, Duskye...
It's always tricky judging these things from a screenshot... but it looks like you have light bleed due to screen lift on the right hand side of the screen.
I have a little light bleed myself on my Nexus 7, though nowhere near as bad as yours. I've taken the back of my Nexus 7, and I've noticed a screw is missing that should clamp the screen tightly to the frame, and thus allowing light to bleed from underneath. It's never really been a major issue for me, as it's only really noticable when the screen is really dark.
If, as you say, your device is new, I wouldn't waste time in trying to fix it yourself... you should get a refund/repair or replacement.
Also, if you have bad screen lift, the screen itself can be prone to easy cracking/shattering as it's not tightly clamped in the frame.
Screen lift/light bleed issues where a significant problem last year (I mean 2012, I forget, it's 2014 now) when the first batches of the N7 came out... but I thought those early production problems had now been ironed out.
One thing you could try... purely as diagnostic... is download from Google Playstore any one of the many testcard apps. They run the screen through a variety of coloured background's... including black... if there is no uniformity across the screen in black, then it's almost certainly screen lift. And you have a hardware problem.
And if this is the case, you should seek redress under warranty.
Good luck.
Rgrds,
Ged.
This happens on _all_ parts of the screen, it's not just that side, and, like I said, this only happens in certain parts, like say if the jellybean wallpaper had jellybeans falling from the top, I would only see those ripples _on_ the jelly beans, and the ripples move along with the jellybeans if they were in any other postion, and no where else. And I should probably mention this: This was not apparent when I had 4.1 on this. This only started happening when I installed Kitkat.
And this is probably me being uninformed, but if this a hardware problem, then how come you are able to see the problems from a screenshot it took from the device itself?
I don't think there is anything wrong with your screen. You are seeing quantization artifacts due to the "dimming". The degree to which you observe this depends on the original image.
For instance, look at your screen on Settings...Display.
All those subtle horizontal bands at the bottom of the screen are not intentional, but due to the fact that a "gradient" painted with a limited number of values will show intensity steps at each value transition, so long as your eyes can resolve that intensity difference. And this effect is always most pronounced at low intensity values.
For instance, "grey" values always have equal R,G, and B intensities, e.g.:
RGB
000 = black
111 = grey1
222 = grey2
...
254,254,254 = grey254
255,255,255 = white
So for instance the "intensity" difference between grey3 and grey4 is
I(grey3) = sqrt(3^2 + 3^2 + 3^2) = 5.196
I(grey4) = sqrt(4^2 + 4^2 + 4^2) = 6.928
(6.928 - 5.196)/5.196 * 100 = 33%
whereas the difference in observed intensity between grey240 and grey 241 is only 0.42%
You won't notice quantization effects in bright images, but you will when the same image is dim.
@Duskye Is this a live wallpaper we are talking about? There are lots of (ahem) "optimizations" that can be made (for instance sub-sampling) which sacrifice image quality for speed, so it is reasonable to believe that a software update could change things. Did you fool with any of the rendering or live wallpaper options in Settings... Developer Options?
PS Ged: When someone takes a "screenshot", they are not literally taking a picture of the screen, but dumping color values from a framebuffer. So it is not possible to capture "bleed" with a screenshot; you would have to use an actual camera for that.
Nope, that's just the regular default jellybean wallpaper, though it does this with any wallpaper.
And the only dev options I touched were USB Debugging, nothing else.
EDIT: I installed Carbon, which latest release is Jelly Bean, and the lines are not as apparent, in fact they're all gone from settings, there isn't even any ripples anymore.
EDIT2: I took a photo with Carbon as well, and made a side by side of the Rastakat and Carbon pictures: http://i.imgur.com/bk6ElGq.png
Duskye said:
Nope, that's just the regular default jellybean wallpaper, though it does this with any wallpaper.
And the only dev options I touched were USB Debugging, nothing else.
EDIT: I installed Carbon, which latest release is Jelly Bean, and the lines are not as apparent, in fact they're all gone from settings, there isn't even any ripples anymore.
EDIT2: I took a photo with Carbon as well, and made a side by side of the Rastakat and Carbon pictures: http://i.imgur.com/bk6ElGq.png
Click to expand...
Click to collapse
Well, there you have it - it's not hardware.
There are other possibilities as well - .JPG image files are partial DCTs (Discrete Cosine Transformations) on 8x8 pixel blocks. They are "partial" in the sense that compression is achieved by dropping high-frequency coefficients of the transform in each block. While all of this is standardized in the JPG format, there is no reason why a rendering method needs to compute the full image for display using all the coefficients - in the name of rendering speed. Similarly, when you "assign" the wallpaper, I believe the source file is copied to a standard location. It is possible that it is also down-sampled at that point in time, esp. if the original image was stored as a high-quality JPG image file (little to no compression).
Anyway, you get the idea - any or all of this can be affected by the ROM build.
Hi I just got my new LG G2 about a week ago, but I noticed there are these small barely visible horizontal lines across the screen, but they only appear in certain applications, specially when there's text or white objects contrasting darker backgrounds, lines appear to come from the text and or objects and extend thru them like the objects are sending them sideways is very weird, immediately I thought the screen came bad but I've been thinking it could be a software issue because as I said, most of the time they are nowhere to be seen like in the lockscreen or when playing games, in those screens the display just look gorgeous and has no issues, its only in certain occasion that you can see them, has this happened to anybody else and do u have any idea on how to fix it with software? or is the display just bad and I have to return the phone? I imported it so it would be a real pain to send it back for a refund.
EDIT: apparently I cant upload images larger than 256kb WTF? the last time I took a 256kb picture was in 2005...