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I played with my NC nearly one week and I like it. But I want to know dose anyone notice the screen of NC is flickering. If you couldn't understand what I mean, please refer to below video,
http://www.youtube.com/watch?v=iDnBSWF44rM
it is not so obvious in real world as in video, but it is noticeable and uncomfortable. I have ipad with IPS LCD but never find this kind of issue. It like some kind of low fresh rate issue in early PC screen, so I want to know whether it is possible to fix it via adjust screen refresh rate in OS level.
Your comments are welcome!
Mine does that but only on the gray background, otherwise I don't see any flickering.
I exchanged my first NC because of this issue. The salespeople thought I was nuts until I demonstrated it for them. My new one still does it but MUCH more faintly and not all the time. I do believe that Barnes & Noble is aware of it (or at least that's something I read in another thread here somewhere..).
It seems to only happen at middling levels of brightness. My first NC exhibited the issue under very specific settings and times, the brightness had to be set between 20%-40% and I had to be displaying a solid area of mid-range colors. I saw it all the time when the screen would dim to display a menu.
From personal experience, you MIGHT be able to get a unit that's better if you exchange. It does seem to be a very common issue, though. Rumor has it that it might be fixable through a firmware update.. we shall see.
I had a pocket pc with this problem many moons ago...The fix was to adjust a trim pot on the display...
No idea if anything like that would apply here, but just wanted to mention it.
I do have similar problem, could any people advise on how to check the refresh rate and increase it?
Many thanks.
Are you planning on rooting or installing another ROM on your Nook? The overclock kernels fix this issue.
from what I see there in the video, if that is what you are seeing...not refresh rate. Rather it looks like a cycling in the backligt control. Almost looks like the PWM duty cycle is out of wack...would explain why it happens at mid range of the brightness.
My first nook color had this problem, I solved it by leaving the brightness up all the time which seemed to prevent it. I got it replaced for other display issues, and my new one doesn't flicker at any brightness, so yeah it sounds like a defect.
Not a defect. It's a problem with stupid coding in the backlight driver.
They set the PWM (pulse width modulation) rate too low, at 40Hz if I remember right. It's easy to fix by setting it up to 60Hz in the driver, which I did in my old Quickie kernel. Totally gets rid of the flicker, and I've seen no side-effects, nor have any been reported to me.
I don't have the time to keep up with the kernel anymore, and for some reason no other kernel dev has pulled my driver fix into theirs. You might talk to Dalingrin or one of the other devs if you really want it, and put them in contact with me at [email protected] and I can help them get it integrated into their kernel.
Can you link to the github commit?
Tx
Sent from my HTC Vision using XDA App
Hmmmm.... my Nook definitely had the flicker issue on most gray colors, especially at dimmer brightness settings. I'm not using your kernel, but I am using Dalingrin's. I haven't seen flicker in months. Could this issue be limited to the stock ROM only?
911jason said:
Hmmmm.... my Nook definitely had the flicker issue on most gray colors, especially at dimmer brightness settings. I'm not using your kernel, but I am using Dalingrin's. I haven't seen flicker in months. Could this issue be limited to the stock ROM only?
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It appears that way from my experience. I was running the dual boot package with stock and CM7 nightly.
The stock rom flickered very noticeably on greyish type backgrounds. Using CM7 and now Phiremod, the flickering has totally gone away.
Actually the fix is already in init.encore.rc:
Code:
write /sys/devices/omapdss/display0/timings 68000,1024/70/200/40,600/10/11/10
That said, it's going into the driver too.
Hi, I have noticed the pink tint to the screen when using adaptive brightness below 30-40% and was wondering if it effects all devices.
I have read a lot of people talking about it and that it happens because the screen goes so dark and some people are saying that it is supposed to happen. Is this true and if not is it effecting all devices?
I am on my 3rd device now the first one i took back after a few hours as the screen was tinted really yellow and uneven and my second one had image retention pretty bad and would happen after 5 seconds of the nav bar being displayed and i dont know if it effected them as i didnt try adaptive brightness as i didn't ha e them for long enough.
The one thing i find really weird though is that i have been using the lux app to test if it was to do with the phone going so dim and while there is a slight pink tint when putting the brightness down on the lux app it is no where near as bad as when adaptive brightness is being used and the lux app goes a lot darker.
Thanks.
I've seen all does it specially at night. I consider this is normal
Its because you're brightness is below 0. If you use adaptive brightness at night its lower than 0 without adaptive brightness. You will see the same thing if you use the lux brightness app.
Edit: I noticed you used the lux app, you're correct its not as bad with it, but it's still there. I could be a software implementation or a bug for all we know.
So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.
lew87ys said:
So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.
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Search
http://arstechnica.com/gadgets/2014...e-premium-price-still-comes-with-compromises/
lew87ys said:
So it is actually on all devices and not a select few?
I got 7 days to return it for another one but if it is on all devices and there is nothing that can fix it i dont think there is no point in risking it for another nexus 6 that could have a worse screen like uneven colours.
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This is more of a feature than a defect, frankly...
Not that it is pink, but that it can be dropped down as low as it can.
Basically, there is a minimum brightness threshold. The lower the brightness, the less power it consumes. If you set the brightness below a certain point, the colors (because of the nature of the amoled) will start to mess up a bit. Most vendors will set the minimum brightness high enough to not have this happen. Google sets it a bit lower to save a bit more power, without making the colors go *entirely* crazy by setting it WAY too low.
Its made like that to conserve power. All nexus 6 are like that
I thought it was a defect too until I started researching and like someone suggested turned off adaptive brightness which made the tint go away completely even at lowest brightness setting.
Sent from my Nexus 6 using XDA Free mobile app
pwc realtor said:
I thought it was a defect too until I started researching and like someone suggested turned off adaptive brightness which made the tint go away completely even at lowest brightness setting.
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Click to collapse
Adaptive brightness is actually a really nice feature.
If the pink bugs you too much, you can (if you know your way around a compiler, that is...) bump up the minimum a little.
What if adaptive brightness is off, and the brightness is set to at least 70%, and the pink tint crap still happens? kernel issue? nougat issue? Because it's very annoying, randomly happens to me. usually, going into twrp and clearing cache fixes it. sometimes it doesn't though.
Help.
EDIT
Never mind. I figured it out. it was night mode that was causing the pink tint via purenexus settings.
Seems like my phone has forgotten it's amoled. It lights up the entire screen even if it's just black. The screen is overly bright and looks washed out and I can see tons of imperfections on it that seem to move with whats on the screen. This leads me to believe it's software, (happened a few days after a cm12.1 install) .
I've tried flashing stock images and it still persists. Anyone experience something like this? Not sure the best solution.
lower your brightness? what brightness do you keep it at?
Regardless of whether brightness is 100% or 0% the screen is overly washed out. It's as though the backlight is being turned on even if there are dark pixels on the screen. Everything is just way brighter and hard to read. Not sure if it's a hardware problem or software problem. Any way for me to determine this? Only thought would be a nandroid backup from my phone being restored on another to see if it recreates the problem but i don't have access to a second nexus 6.
Noxey said:
Regardless of whether brightness is 100% or 0% the screen is overly washed out. It's as though the backlight is being turned on even if there are dark pixels on the screen. Everything is just way brighter and hard to read. Not sure if it's a hardware problem or software problem. Any way for me to determine this? Only thought would be a nandroid backup from my phone being restored on another to see if it recreates the problem but i don't have access to a second nexus 6.
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Can` t you go to store where they sell the Nexus 6 to compare? I reccon you`re on stock and don`t use a custom kernel for color control, my screen is beautiful imo. But also its possible that maybe you have a faulty device, it can happen ....
My screen was great. It's a recent issue that came up. It has happened in the last few days.
So my display after being replaced 2 times in 6 months started flickering. My phone is very hard to be turned on because of the green flickering.
I just want to upgrade to a S6,S7 Edge or non edge. i just want to know if they have the save problem with displays ? I want to have a phone at least 2 years, can you recommand me a phone like that ?
I was just considering switching to a iPhone even though i prefer android on phones ... o how are S6,S7s displays ? Samsung still have the same problems?
Samsung improved a lot on screen quality in S6 and after, so you should be okay
Dieexe said:
Samsung improved a lot on screen quality in S6 and after, so you should be okay
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So no more sudden flickering problem ? I mean i didnt even dropped the phone or something like that.
RootNightmareX said:
So my display after being replaced 2 times in 6 months started flickering. My phone is very hard to be turned on because of the green flickering.
I just want to upgrade to a S6,S7 Edge or non edge. i just want to know if they have the save problem with displays ? I want to have a phone at least 2 years, can you recommand me a phone like that ?
I was just considering switching to a iPhone even though i prefer android on phones ... o how are S6,S7s displays ? Samsung still have the same problems?
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green flickering problem just for auto brightness problem (some custom Roms have this issues) if u will untick the auto brightness u will not have this problem
Not really, it has more issues on this "display green flickering " , on my S5 i dont get display on if the temperature around it getting cold .
Sent from my Samsung Galaxy S5 using XDA Labs
atakan1986 said:
Not really, it has more issues on this "display green flickering " , on my S5 i dont get display on if the temperature around it getting cold .
Sent from my Samsung Galaxy S5 using XDA Labs
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Wow that's amazing. Been using samsung s5 exynos version for the last 1yr. Never had that kind of problem till date. And it have the same display as snapdragon version. And on comparison I found that this is by far the best display out there when compared to other brands.
Maybe perhaps you might be having a faulty unit from the begining.
Sent from my SM-G900H using Tapatalk
I have the same problem here with the display and it's not a software problem (same by original os 6 and same by cyanogenmod 14).
After the temperatures are under 10 C. i can't open my s5 with home button i must do it over the power button.
Using S5 for more than 28 months still I have not faced any issue. I just had to buy new charger apart from that not a single problem and yes I mess up with my phone so much but I still working and no display failure yet. And also I have dropped it many times, it still refuses to die.
You are just having a defective model or some internals of the phone are messed up. Because Samsh*t produces one of the best displays..
shurupi said:
I have the same problem here with the display and it's not a software problem (same by original os 6 and same by cyanogenmod 14).
After the temperatures are under 10 C. i can't open my s5 with home button i must do it over the power button.
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Click to collapse
So when its over 10C its ok ? Then i should sell the phone when its summer )
nikhil007.n2 said:
Using S5 for more than 28 months still I have not faced any issue. I just had to buy new charger apart from that not a single problem and yes I mess up with my phone so much but I still working and no display failure yet. And also I have dropped it many times, it still refuses to die.
You are just having a defective model or some internals of the phone are messed up. Because Samsh*t produces one of the best displays..
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At least for s5, the internet is full of this faulty displays, even my friends have same problem.
RootNightmareX said:
So when its over 10C its ok ? Then i should sell the phone when its summer )
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Very simple but good idea my friend : )
Sent from my Samsung Galaxy S5 using XDA Labs
RootNightmareX said:
At least for s5, the internet is full of this faulty displays, even my friends have same problem.
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This may be problem for Snapdragon variant then.
nikhil007.n2 said:
This may be problem for Snapdragon variant then.
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Maybe thats a point, but shouldnt only the processor be different? I assume the display is.the same for both...
nikhil007.n2 said:
This may be problem for Snapdragon variant then.
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Click to collapse
Nope, Exynos variant have this same problem
Im also facing green flickering and blinking at low brightness.
Sent from mySM-G900F using Tapatalk
baseer_IF said:
Im also facing green flickering and blinking at low brightness.
Sent from mySM-G900F using Tapatalk
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Its not a good sign. Try disabling your light sensor. Even then if you experience such a problem than it means that your flex cable that attaches the screen with the motherboard needs to be changed.
Sent from my SM-G900H using Tapatalk
redhotiron2004 said:
Its not a good sign. Try disabling your light sensor. Even then if you experience such a problem than it means that your flex cable that attaches the screen with the motherboard needs to be changed.
Sent from my SM-G900H using Tapatalk
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I try to disable Auto brightness. but in manual the problem is persist when when brightness is full low .
if brightness is normal it is normal
Sent from my SM-N9300 using Tapatalk
RootNightmareX said:
At least for s5, the internet is full of this faulty displays, even my friends have same problem.
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Click to collapse
Hi,
Yes and expect the same problems with the following generations. It's an amoled screen thing. The green colour happen when there's a colour displayed on the screen for a very long time (for example, I have a green on my screen of the size of my keyboard).
I think a solution to this problem is to set the display to turn off after 30s (it saves battery too) and maybe, if you're using a custom keyboard, change the colour from time to time. Use the brightness of the screen to a lowest which would still be comfortable to you (and auto unticked).
This last tip alone is enough to prevent greening. My flickering happened after an incredible fall (it had a tempered glass so the screen was safe). The flickering showed green what it had in memory.
Samsung has a 2-year guarantee for its products so you shouldn't worry for that period of time. Problem not solved, replacement.
Best of luck
Superlion721 said:
Hi,
Yes and expect the same problems with the following generations. It's an amoled screen thing. The green colour happen when there's a colour displayed on the screen for a very long time (for example, I have a green on my screen of the size of my keyboard).
I think a solution to this problem is to set the display to turn off after 30s (it saves battery too) and maybe, if you're using a custom keyboard, change the colour from time to time. Use the brightness of the screen to a lowest which would still be comfortable to you (and auto unticked).
This last tip alone is enough to prevent greening. My flickering happened after an incredible fall (it had a tempered glass so the screen was safe). The flickering showed green what it had in memory.
Samsung has a 2-year guarantee for its products so you shouldn't worry for that period of time. Problem not solved, replacement.
Best of luck
Click to expand...
Click to collapse
The funny thing is i already did "by mistake" all the tips you said and still have this. Never dropped the phone though. This problems seems very big though, i expected a burn in to be the biggest problem, but to have flickering at a level that i cant turn on the phone. I wanted recently to switch to a Nexus 6p, but knowing that it uses Amoled too, its a bad ideea. So the only "solution" is to switch to IPS screens? (btw i want a phone that holds on for at least 3 years)
In my research thus far, the AMOLED screen technology is to blame. When the display circuits get old or damaged, they don't sustain current at low power settings. In LED screens, a back light controls brightness, but AMOLED screens send current to each pixel for brightness control. If the circuit is damaged, or any corrosion has built up inside, this could attenuate the current below the point required to sustain light flow. I see this problem with some LED and CFL lights on motion sensor switches. Just enough current goes through the motion sensor to keep it's circuits active, and that current causes a flicker in the light.
With the screen though, since the problem is only resolved when you increase the brightness just a bit above minimum, it seems anything that lowers the display power (auto brightness for example) will cause it to flicker if this setting gets too low. I also noticed that before the screen locks on timer, it dims to low power for a few seconds and flickers as a result. There are apps that attempt to resolve this by putting a translucent black screen over your desktop and apps. This keeps the power up on the pixels but adds a black overlay, kind of like a screen filter. You can adjust the darkness if you need it to save your eyes when reading in the dark but it doesn't help save power any. They also require a rooted device, which could void warranties. The reason for this I believe is because apps are supposed to operate in a way they don't intrude on each other, and a filter that lays over your screen does in fact alter the output of your display rendering. With the added security concerns of these apps possibly collecting screen shots and sending them to another site, I would avoid this. Best to use a physical screen overlay you can put on or remove as needed as long as it doesn't interfere with your touch screen options.
Ultimately, these devices were meant for replacement every 2 to 3 years so if you're like me and you like to make your investment last, best thing to do is apply any work around you can come up with. A repair shop may be able to wipe the circuit boards down with a solution that clears away corrosion, but it won't repair any weakened pixels. I'm still using a Samsung S5 G900F
- And i finally got this fixed. it sounds like the reason for this is that since the latest update your phone cannot decide whether to use hardware or software back light settings. I managed to make the problem go away by doing this:
Go to settings >> system >> About device.
Find "Build number" and click 6 times fast on it.
You will then get the message saying: "You are now a developer"
and then go back to Settings >> system >> Now you will see the "Developer Options"
Now go to Developer options >> Drawing Section or Rendering Section >> Find "Turn off hardware overlays" or "disable hardware overlays" >> This will force the phone to always use GPU for screen adjustments. no more flickering.
but If I turn the brightness ALL the way down, it still flickers like crazy, however, if that's the only time it'll do it, I consider that a win.
Read More :good:
Hello!
I received a pixel 7 phone today and at a slight angle on the white screen I see strange shades (something like rainbow, green), but when I look directly at the phone, this is not noticeable. In normal operation, this is imperceptible, it is noticeable only when only the white screen is on. on the old oneplus 6t phone, this effect is the same, but here it is a little better visible on a white background, perhaps due to the fact that the pixel is much brighter than the screen. Should I be worried, or is this how it should be and you just need to get used to it?
On the Internet, I found a video on a similar problem. Link to similar issue:
https://www.reddit.com/r/pixel7series/comments/y3af8s
My pixel 7 does not have this. Based on what I found on the internet, it seems this is a quality control problem for the display where some screens will have this while others do not.
It seems that the advice is that if this problem annoys you, then the best thing to do is to return the device for a full refund. Then re-purchase the device.
It's not recommended to replace, because then it becomes difficult to ask for a refund/another replacement if something does happen again.
I dont have this
It's because of the display panel being used. DXOmark reviewed the Pixel 7's screen and stated:
The biggest color-related problem on the Pixel 7 is that it shows alternating pink and blue stripes as the viewing angle changes, as seen in the photo below and the graph.
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The display still got 140 points and is currently in line with phones like the iPhone 14.
If you have dark mode turned on it's way less noticeable.
injectx said:
It's because of the display panel being used. DXOmark reviewed the Pixel 7's screen and stated:
The display still got 140 points and is currently in line with phones like the iPhone 14.
If you have dark mode turned on it's way less noticeable.
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Father-in-law is it normal if I look directly at the screen and see this effect a little bit?
EdvinsJu said:
Father-in-law is it normal if I look directly at the screen and see this effect a little bit?
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Click to collapse
Yes.