Develop Bugs

Dead Pixels anyone?

So I noticed last night while trying to take a picture in the dark (yeah I know it doesn't work lol) that my screen has close to 75 dead pixels in it. Is this typical of TP2's? None of the three G1's I've gone though had a single dead pixel. In fact, I have not seen a screen with this kind of deadness since the original PSP... Well I'm within my 14 days, so this one is going back to T-Mobile.
I think I may just wait for T-Mo to toss out the HD2, or what ever device they launch that will have the ability to utilize WinMo 7 upon release.

75, tha's a bit much. I have 5 on my tp2 and 2 on my hero. I am probably gonna get the tp2 replaced. They really don't bother me though. I really don't want to get stuck with a refurb

I wish that I had checked my first TP2 for them, but I had to send that one back as the automatic speakerphone didn't work. (Nor did anything that used the rotation sensor, like Need For Speed: Undergroud, obviously sensor version!)
The dead pixels bother me when playing darker games, or looking at darker pics. Also, I just installed a dark theme, and now it looks like there is water dripping down it (in a bad way) lol.
If my next replacement has any more issues, I'm just going to send it back and get out my half broken G1 again. It shouldn't be this hard to do a quality check before shipping.

HTC doesn't recognize dead pixels as something wrong with the unit, except if there's 3 (or more) dead pixels on an area not larger than 1cm^3 (one cubic centimeter). 75 totally is obviously quite alot. ;P
personally i have one dead pixel on my Swedish unbranded TP2, and just one dead pixel isn't really bothering at all, even if it, of course, would've been nicer without it.

What does "taking a picture" and "dead pixels" have to do with each other unless you're talking about the camera itself having dead pixels?
If you want to check the screen for dead pixels find something that displays solid black, white, red, green, blue... There are several "flashlight" programs that do this.

khaytsus said:
What does "taking a picture" and "dead pixels" have to do with each other unless you're talking about the camera itself having dead pixels?
If you want to check the screen for dead pixels find something that displays solid black, white, red, green, blue... There are several "flashlight" programs that do this.
Click to expand...
Click to collapse
camera lenses cant possibly, not even in a million years, ever have pixels. thats just absurd.
taking a picture in the dark.
in other words, it was an all black screen when he/she:
1- took the photo in the dark
2- saw the dark photo.
that is when he/she noticed the dead pixels.

One dead pixel reporting here
Not a big deal...
I read somewhere about an app to correct this dead pixels
Anyone know more about this?

djinfamousflo said:
camera lenses cant possibly, not even in a million years, ever have pixels. thats just absurd.
taking a picture in the dark.
in other words, it was an all black screen when he/she:
1- took the photo in the dark
2- saw the dark photo.
that is when he/she noticed the dead pixels.
Click to expand...
Click to collapse
I think we all know what djinfamousflo really means. The exact technical terms were probably not used correctly but the point is, you really can't come to the conclusion that you have dead pixels based on taking a photo in the dark and then looking at that photo. If that were the case, I would have several dead pixels myself. My photo taken in the dark actually has a couple of pale spots.
If you really want to test, you need to fill your screen with black, blue, green, and red. See if each pixel can display each color. Try it with the pics I've attached.
orb3000 said:
One dead pixel reporting here
Not a big deal...
I read somewhere about an app to correct this dead pixels
Anyone know more about this?
Click to expand...
Click to collapse
I don't think you can fix a dead pixel (ie, if your screen is suppose to display white, and the pixel is black, then it's pretty much really dead).
But you may be able to wake up a stuck pixel if you have an app that rapidly continuously flashes red, green and blue.

I noticed them when I took a picture in a no light environment, and proceeded to test with my flashlight app. I'm within T-Mobile's 14 days, so I can get this one replaced, I just wanted to make sure this wasn't a wide spread issue.
Thanks for posts guys

How easy is it to spot a single dead pixel? Does it glare out at you and taunt you everyday, or is it something you rarely notice?
I assume "dead" means it doesn't display anything and "stuck" means it only displays 1 color always.

ohyeahar said:
I don't think you can fix a dead pixel (ie, if your screen is suppose to display white, and the pixel is black, then it's pretty much really dead).
But you may be able to wake up a stuck pixel if you have an app that rapidly continuously flashes red, green and blue.
Click to expand...
Click to collapse
Thanks I´ll try that and report back
What is the app that rapidly continuously flashes red, green and blue?

fortunz said:
How easy is it to spot a single dead pixel? Does it glare out at you and taunt you everyday, or is it something you rarely notice?
I assume "dead" means it doesn't display anything and "stuck" means it only displays 1 color always.
Click to expand...
Click to collapse
It's pretty easy to spot if you splash the screen with red, green, blue, and white. Your "dead" and "stuck" definitions are spot on...
orb3000 said:
Thanks I´ll try that and report back
What is the app that rapidly continuously flashes red, green and blue?
Click to expand...
Click to collapse
Try this. But I couldn't get it to run full screen, so if your stuck pixel is on the top or bottom bars, then it won't work. You can however, slide out your keyboard and force the app to run landscape to cover more ground. But you're out of luck if your stuck pixel is in the corners.

khaytsus said:
What does "taking a picture" and "dead pixels" have to do with each other unless you're talking about the camera itself having dead pixels?
If you want to check the screen for dead pixels find something that displays solid black, white, red, green, blue... There are several "flashlight" programs that do this.
Click to expand...
Click to collapse
djinfamousflo said:
camera lenses cant possibly, not even in a million years, ever have pixels. thats just absurd.
taking a picture in the dark.
in other words, it was an all black screen when he/she:
1- took the photo in the dark
2- saw the dark photo.
that is when he/she noticed the dead pixels.
Click to expand...
Click to collapse
Okay.... So I obviously did not say a lens.
Second, taking pictures in the dark and checking for "dead pixels" is complete and utter nonsense. Flat out nonsense. Again, the ONLY thing that could POSSIBLY find is hot pixels in the camera sensor.

khaytsus said:
Okay.... So I obviously did not say a lens.
Second, taking pictures in the dark and checking for "dead pixels" is complete and utter nonsense. Flat out nonsense. Again, the ONLY thing that could POSSIBLY find is hot pixels in the camera sensor.
Click to expand...
Click to collapse
Yes, yes you can. In a low to zero light environment they show up just fine. Camera's don't have pixels. And the camera sensors are digital. They don't work like a screen. Thus when you power on your camera and go into a bathroom you will indeed see DEAD/STUCK pixels. (Assuming your device has any) AND I USED A FLASHLIGHT APP AFTER TO VERIFY. There is a significant difference between a dead pixel, and super low light pixilation that occurs from the CMOS sensor (That's what the camera uses to take a picture.) attempting to raise the light level.
Please if you don't have anything constructive to add, don't add anything at all.
I sent TP2 back for replacement today, and will try out number three. If the third one has issues, well I'll be going back to my G1 personally.

Oh yes - And I never TOOK a picture to find them, I simply noticed this while trying to take a night shot of some pumpkins, thus making the entire screen black. Now if I then took a picture and looked at it, it would show nothing, as the CMOS doesn't have dead pixels. I just NOTICED the dead ones while the screen was all black IN the camera APP.
Maybe that makes it clearer?

q426669 said:
Yes, yes you can. In a low to zero light environment they show up just fine. Camera's don't have pixels. And the camera sensors are digital. They don't work like a screen. Thus when you power on your camera and go into a bathroom you will indeed see DEAD/STUCK pixels. (Assuming your device has any) AND I USED A FLASHLIGHT APP AFTER TO VERIFY. There is a significant difference between a dead pixel, and super low light pixilation that occurs from the CMOS sensor (That's what the camera uses to take a picture.) attempting to raise the light level.
Please if you don't have anything constructive to add, don't add anything at all.
I sent TP2 back for replacement today, and will try out number three. If the third one has issues, well I'll be going back to my G1 personally.
Click to expand...
Click to collapse
I bolded your statement that you really should stick to, although perhaps you should replace "constructive" with "useful".
If you have dead pixels by viewing with a app that shows solid colors, you have stuck pixels. Using the camera in a dark room is not the way to find them.
And digital cameras don't have pixels?? The Tilt 2 has a 3.2MP camera. You can interpolate from there.

To revive a somewhat stagnant thread... if I take pictures on my TP2, there is one all-white pixel that shows up in every picture. Funny thing is it shows only when viewing previously taken pictures, it does not show up in the viewfinder before clicking the shutter.
And no, it's not a dead screen pixel... as I can zoom in on it and move it around.
So looks like a dead CMOS pixel.

quid246 said:
To revive a somewhat stagnant thread... if I take pictures on my TP2, there is one all-white pixel that shows up in every picture. Funny thing is it shows only when viewing previously taken pictures, it does not show up in the viewfinder before clicking the shutter.
And no, it's not a dead screen pixel... as I can zoom in on it and move it around.
So looks like a dead CMOS pixel.
Click to expand...
Click to collapse
View it on your computer; does it still show? Same place every time, again on the PC.

if its on a picture and not permanently on the screen, its not a dead pixel, its noise on the photo. web cams are notorious for little stray off color pixels. i dont think a camera phone is a proper replacement for a real camera. dead pixel and stuck pixel are the same thing. normally flashing black and white on the screen really fast will fix them but thats more for computer monitors. dunno how that would refer to a phone because ive only seen an iphone that had dead pixels, never on any other. if it really bugs you, it is a warranty issue and you can get your phone replaced.

Pink tint in centre of camera when in low light - faulty?

I've seen cameras in the past that exhibited a pink tone in the centre of the image. My G4 does this too, though it is only noticeable in low light. For example if I take a photo of the grey of my cord trousers in low light the very centre of the image will have an obvious pink tint. If I take a photo in average to normal light it's not visible.
Does anyone else have this issue? Mine is an O2 UK phone, brown leather back.
The same photos taken on my S6 have no tint at all.

it looks like a faulty phone ,-, try to get a replacement for it

I've just taken it back. Might wait till I can get it for a better price for the time being, especially now I've got it out of my system

I'm wondering if the pink you're seeing in your low light pics could possibly be the infrared auto focus? It could be that the camera snaps the photo b4 the light goes out. That would explain why you see it in low light photos only.
You cannot see infrared light with your naked eyes, but a cell phone camera can. Have a friend watch you through another cell phone or camcorder as they stand in front of you, while you snap a photo of them. Tell them to look for a flickering red light coming from your camera.
If that's the case, it can be fixed with a software update. The light needs to go out b4 the shutter opens.
Sent from my Nexus 7 using Tapatalk
---------- Post added at 12:07 AM ---------- Previous post was at 12:05 AM ----------
I can't remember if the G4 has manual focus, but if it does, try using it for the same test. Maybe the infrared light won't come on and the pink will not show up.
Sent from my Nexus 7 using Tapatalk

leebo said:
I'm wondering if the pink you're seeing in your low light pics could possibly be the infrared auto focus? It could be that the camera snaps the photo b4 the light goes out. That would explain why you see it in low light photos only.
You cannot see infrared light with your naked eyes, but a cell phone camera can. Have a friend watch you through another cell phone or camcorder as they stand in front of you, while you snap a photo of them. Tell them to look for a flickering red light coming from your camera.
If that's the case, it can be fixed with a software update. The light needs to go out b4 the shutter opens.
Sent from my Nexus 7 using Tapatalk
---------- Post added at 12:07 AM ---------- Previous post was at 12:05 AM ----------
I can't remember if the G4 has manual focus, but if it does, try using it for the same test. Maybe the infrared light won't come on and the pink will not show up.
Sent from my Nexus 7 using Tapatalk
Click to expand...
Click to collapse
Already considered that idea but the simple test was to cover the IR port up with my finger. It still showed up. Thanks anyway

Um, I don't think the camera uses that IR port. That is for controlling your TV.
For example, many smartphones do not have an IR port, yet they have auto focus. Try what I suggested b4 dismissing it. At least try taking a pic of yourself in front of a mirror. The pic should not catch the red IR light. If it does, there's some kind of timing issue.
Signature edited to appease the OCD's

leebo said:
Um, I don't think the camera uses that IR port. That is for controlling your TV.
For example, many smartphones do not have an IR port, yet they have auto focus. Try what I suggested b4 dismissing it. At least try taking a pic of yourself in front of a mirror. The pic should not catch the red IR light. If it does, there's some kind of timing issue.
Signature edited to appease the OCD's
Click to expand...
Click to collapse
I mean the IR port on the back, not the top! The one that blinks. I've tried covering all the sensors and there's still a pink tint.

Think your phone is a broke one, call you agent and get a new one
Verzonden vanaf mijn HTC Desire met Tapatalk

Has this been resolved by a replacement? I have the same issue with the pink tint/hue in the camera and I have the T-Mobile 811. I'm wondering if others have the same issue

Reminds me of the pink tint issue with the M7s. Did you feel any heat around the lens area?
In the case of the M7 it was crappy heat issues. If this happens again on the G4, I'll be getting rid of this real quick

The phone was cool and it still showed. I don't think is the heat because when I took pictures outside there was no pink tint. It's on low light conditions that it happens. I also had an issue with random dimming erratically with the auto brightness off. I did a warranty exchange and getting it tomorrow. I am hoping it doesn't have the same issues.

Got the replacement by and still has the pink center hue in the camera. This is bs. I believe people have this issue and they don't realize it. This can't be a coincidence. I don't even know what to do now. I can't return the phone since I'm past the return period.

I had the same nagging opinion with my first LG G4. I tried comparing it to the LG in my T-Mobile store but it was hard to replicate.
In the end, I replaced it for a different issue. There is still a pinkish hue near the center in some photos, particularly in lower lighting, though maybe a little better than the first (could be placebo effect)? I'm satisfied in it being just a quirk of this phone under some conditions.
Take a look at the "Post your LG photos" thread. Post some of your photos here or on that thread.

Not happy with the replacement. I still have the pink center. You definitely notice it on a white background . The crappy part is when to take video or pictures, the pink shows up. I used manual controls to change white balance to make the pink go away but it becomes way too white and unnatural. I'm going to open up a thread in the T-mobile section. I'm also going to contact LG and see what nonsense they are going to spew.

That's not pink, it's magenta, tmobiles signature colour.
If i remember correctly, lots of Xperia z3 users had the exact same issue, maybe they found a solution that can be transferred over to the g4?

There is a thread about green spots appearing in pictures for some people.
It seems that the green spots do not appear in the actual RAW (DNG) files themselves. Meaning that the green was not captured by the image sensor, and was instead added during the image processing that created the JPG.
Note that you will likely need to pull the DNG over to a computer and view it in appropriate software that can display DNG files (UFRaw is free). You will still see it on the screen/gallery on the phone, as those are showing the JPG.
Please try taking a picture in Manual, with JPG+DNG output, and check if the DNG shows the pink.
Edit: Other thread, about the green spots issue:
LG G4 green spot appearing in photos

It has nothing to do with the M7 purple tint thingy, this is something I saw in numerous old phones I had, mainly Sony Ericsson ones and perhaps Desire HD. Any white background(like walls) indoors will give the pink spot on older phones, I wonder how it's showing on G4

i tested and verified this pink spot in same conditions 10 minutes ago. lots of z3s also have the same problem afaik. i m starting to guess this problem originates from the lovely sony lenses. does anyone know which lens lg camera uses?

solventh said:
i tested and verified this pink spot in same conditions 10 minutes ago. lots of z3s also have the same problem afaik. i m starting to guess this problem originates from the lovely sony lenses. does anyone know which lens lg camera uses?
Click to expand...
Click to collapse
IMX 234 RS
LG G4

now i m sure. sony destroys everything.

Bad "backlight" uniformity?

Hi all,
Had my Pixel for a few days now and noticed what I thought was a new gradient in the background of posts in the XDA labs app, I checked the screen using one of the grey test colours and found that I'm getting a dark cloud over the bottom right hand side of my screen. I tried taking a photo with my old phone (Moto X Pure) but the camera isn't good enough at low light for it to show up, I'll try and get a photo with my DSLR when I'm back from work later today. In the mean time some quick googling has shown it's very similar to the "Dirty Screen Effect" described here: http://www.rtings.com/tv/tests/picture-quality/gray-uniformity-dirty-screen-effect-dse
Had anyone else noticed this? Do you think Google would RMA it? I've not really been bothered by the blue shift on my device so I'm slightly concerned that I might end up with a worse replacement if I do send it back
Cheers
Michael

It's a tough call, you have to ask yourself if you can live with it or not. Does it show up a lot during normal usage? Or is it just with the XDA labs app and similar applications in a low light setting with your brightness turned to like 0-10%? Or if you can see it at all times regardless of brightness settings you can contact Google tell them of the screen issue and get a RMA. Check out the replacement and compare the blue shift to your current and see if it also has the same issue as your current device. If it's better in both regards send it back, if the blue shift is a bit worse on the one and you can tolerate it and it doesn't have the bad back light uniformity you could keep it. That's what I would do personally, best of luck!

Yes, I have a similar issue. My first device had severe blue tint at any angle and Google would not replace so I returned and and reordered. The second device had only slight blue tint and is not an issue but of course has the uneven grays. The right side of the screen is much darker and there is also a dark spot around the sim tray area on the left side. I sent Google pictures and they are sending a replacement. It's only noticable in low light, looks fine at higher brightness though.

Ah I didn't realize they sent you the replacement first. That makes it a much easier decision. I'll still try and add a photo of it in the OP later today but RMA seems like the best choice. It's noticeable at lower backlight brightness and since it's winter here in the UK now the auto-brightness often drops it down to a level where it is noticeable just in normal daily use.

I get a VERY slight hint of that on a dark gray background at 5-7% brightness in a totally dark room but other than that very specific condition it's uniform otherwise.

The photo as promised unedited straight out of the camera (USB C OTG is neat). It's not quite this bad in person, if you imagine the light grey is the same shade as the dark grey in this image and the dark grey as being almost black then you get the idea, but it does show the difference between the two and it is clearly visible with the naked eye in a dark room.
The grey image I'm using is here: https://i1.wp.com/ausdroid.net/wp-content/uploads/2017/10/screenshot_20171022-153201.png?ssl=1

Grindboy said:
The photo as promised unedited straight out of the camera (USB C OTG is neat). It's not quite this bad in person, if you imagine the light grey is the same shade as the dark grey in this image and the dark grey as being almost black then you get the idea, but it does show the difference between the two and it is clearly visible with the naked eye in a dark room.
The grey image I'm using is here: https://i1.wp.com/ausdroid.net/wp-content/uploads/2017/10/screenshot_20171022-153201.png?ssl=1
Click to expand...
Click to collapse
Woah! Holy crap that's pretty bad. I would RMA that bad boy right away.

Subtle purple edge tint in very low light? (S20+)

Anybody else noticing an extremely subtle light purple-ish haze on the edges of extremely low light photos - i.e. where the dark/black areas are in a low light photo around the edges?
It's subtle. It's a reach to see it at times. But this is an expensive phone, so I'm going to nitpick... It reminds me of the old issues with the HTC One M7 and some older Motorola devices, though on a much more subtle level. I'm probably crazy, but I know I'm seeing it at times.
Snapdragon S20+ here (Verizon variant)

Ok, so I realize it would've helped my first post with some photos and additional info. Please keep in mind, I love the camera on this phone 90% of the time, but this 10% is an issue that reminds me of the old days (per my first post). I have two sets of photos... First are the originals, uploaded, and added into Photoshop with a black "frame" to help you see the haze better. The second set is a photo from my iPhone of what those photos look like on my S20's screen. Reality lies somewhere in between the two. The second set over-emphasizes more than what I see on the screen, and the first set mutes it too much. These photos are night mode photos, which I realized after my first post helps to accentuate and show the issue.
Ultimately the problem seems to be how the software and/or sensor are handling the extremes when you have a bright light source as the focal point, and dark outer edges (again, reminiscent of oooold devices). Anyway, the photos are attached. Hopefully that help clarifies it a bit more. It's nitpicky, as there aren't many scenarios where this would come up. But it's a $1k+ phone... I feel like I'm allowed to be nitpicky.

Is it always on the left side of the phone screen? i.e. always on the top of the phone? or does it change to either side when you rotate the phone (could be on the top or bottom sides)? I have not observed this purple thint issue, but your third photo shows that it is extremely bad.

Sleepycat3 said:
Is it always on the left side of the phone screen? i.e. always on the top of the phone? or does it change to either side when you rotate the phone (could be on the top or bottom sides)? I have not observed this purple thint issue, but your third photo shows that it is extremely bad.
Click to expand...
Click to collapse
No, it's more pronounced on the left there due to the lighting in that situation. But if you look at the fourth picture you can see it's relatively even on both sides where things start to darken.

jntdroid said:
No, it's more pronounced on the left there due to the lighting in that situation. But if you look at the fourth picture you can see it's relatively even on both sides where things start to darken.
Click to expand...
Click to collapse
I'm not saying it's normal, I too suffered from the HTC M7 syndrome but in those specific photos, is the purple haze coming from a TV light on your left? Is there any tv screen running when you took the pictures?

Tabtoub said:
I'm not saying it's normal, I too suffered from the HTC M7 syndrome but in those specific photos, is the purple haze coming from a TV light on your left? Is there any tv screen running when you took the pictures?
Click to expand...
Click to collapse
No - no TV's on anywhere. The purple haze is coming from the especially dark areas.

Just checked on mine s20+ exynos, other than very minor green tint no issues, if i were you i would replace it asap - something isnt right

Klopers33 said:
Just checked on mine s20+ exynos, other than very minor green tint no issues, if i were you i would replace it asap - something isnt right
Click to expand...
Click to collapse
I bought an unlocked S20 (+ was too large for me anyway) and tested it last night in the exact same spot and exact same scenario, and very little haze at all with no purple. I can see what it's trying to do - it's trying to lighten up those darker areas, but for some reason on that S20+ it was making it purple-ish and just plane ugly. It doesn't look "great" on the regular S20, but it's at least not purple and clearly just trying to lighten it up. S20+ is already on its way back for the return.

yellowish tint/tone on screen,known issue or?

Well,this frustrates me a lot,I'm just uploading video so you can see and compare to some cheap other chinese phone.
I'm noticing yellow tone all over screen,kinda like there is a night filter on with very low bright nightlight settings.
I increased brightness all the way to 100 % didn't help.
I also removed plastic cover from phone,nothing, still present.
I even switched to Vivid display settings before that and reduced RGB (R channel all the way,G to middle and Blue increased all the way) and set tone color to cooler slider all the way,no difference.
So,since I purchased using phone,is this some software bug/issue or I got faulty screen (maybe some kind of damage from sunburn),or this is just how this display work?
I'm uploading video and will post link soon...
So anyone else having same issue,and what to do,be sure I can not RMA the phone since I purchased it used.
I'm also anxious that the screen might die on me soon.
But this yellow tone frustrates me a lot,colors are not accurate at all because of it.

does it show in safe mode? what happens after reboot, goes away and come back later or...?

raul6 said:
does it show in safe mode? what happens after reboot, goes away and come back later or...?
Click to expand...
Click to collapse
Hmm,why would I want to access safe mode,I don't have issues with phone except bad wifi and this issue.Mostly it's noticeable while watching vids (youube),look here if you can see the difference...but maybe it is suppose to be like that.
I set color mode all the way to cool tone and no difference to my eye.

I called a friend on a drink which has N10+ too,then we put 4k Nature video on each of the phones at same time and same screen lightning intensity.
No diference,between them...so now I'm confused totally.
Are my eyes cheating on me,is it possible that there is slight yellow tint (like light night light filter) or something is wrong with my eyes?
Is it possible that maybe screen adapts it self based on ambient light so I'm seeing yellowish tone...who knows,but I do trust my eyes,though picture was the same color accuracy on both phones...
I'm totally confused now...

I have currently 2 note 10+ phones. One which still has the original display while on the 2nd I installed a new display with frame. Comparing both these phones now, the older display - about 1.5 years old with light screen burn on the bottom is more yellow than the new one. The new one is very white compared to the old one. Maybe your display is showing its age?

damn...it was a damn mask/cover with yellow tint over it,not display...how was I stupid.

Some weird posts here, didn't you say you removed the film earlier ?