Develop Bugs

Sensitive eyes and black levels

I just picked up a Galaxy Nexus from WIND Mobile.
I have to say, the one thing I dread the most about AMOLED is the black/bright contrast. My eyes are very sensitive, and whenever I see something bright against an intensely dark background I get halos and it's very difficult to focus. For this reason I prefer LCD screens where the blacks are slightly grey. Nonetheless I decided to make the leap to the GNex because I like a lot of other things about it.
Do you think there is any sort of hack that could make the AMOLED look a bit more like an LCD? I realize this would affect battery life but basically what I'd like is to hack the colour space so that black becomes maybe 1-5% grey. I remember on CM7 there were hacks that could apply filters to make white into a more salmon-pinkish hue, a warmer white, etc. What I'm looking for is the reverse - leave the white alone but make the blacks greyer.
Anyone think this might be possible?

I don't know a specific solution, but here are some options:
If you're rooted, francois kernel and app can adjust the Gama levels, affecting all colors, but may help.
App Log graph can adjust your auto brightness levels.

Yes I am rooted.
Does increasing the gamma change the black levels? If so that could help.
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The black on my phone at highest brightness is a little bit grey..
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tcchuin said:
The black on my phone at highest brightness is a little bit grey..
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Click to collapse
It seems to depend on the app. Some apps have a gentle dark grey gradient in the background. But the stock taskbar, even at full brightness, is just as black as the same part of the screen is when the screen is off.

Not trying to be a comedian here, but have you gotten your eyes checked lately?
Seeing halos is linked to several severe eyediseases or wearing wrong/none correction.

+1. Yup.
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Streaker said:
Not trying to be a comedian here, but have you gotten your eyes checked lately?
Seeing halos is linked to several severe eyediseases or wearing wrong/none correction.
Click to expand...
Click to collapse
Fair enough. Optometrist says my eyes are healthy but I have large pupils that don't contract very efficiently. As a result I get halo effects at high contrast even when using proper vision correction. It's not something that poses a health threat otherwise. But he did advise me strongly against laser eye surgery as there would be a high risk of halos getting worse.
So that's me in a nutshell.
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Super dim is a root app and it can lower the brightness below the normal values
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ChongoDroid said:
Super dim is a root app and it can lower the brightness below the normal values
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Click to collapse
I'm not looking to lower the brightness - I know how to do that already. I'm looking to decrease the contrast by making the black levels greyer.
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T-mobile has mismatched led colors

I used a LED test app to see what colors would work and the colors were all off. I press the blue button and my red LED turns on. Green turns on like a weird blue Magenta.
I'm curious if anyone else has this problem or if there's a better app out there for testing (I've tried light flow, blink, and LED test)
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Yeah, it's a known issue that all the color signal are screwed up. I believe this is an OS problem and using a non-touchwiz ROM like CM9 or CM10 would fix the issue.

Mine good.
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i can confirm after having the issue with the stock rom, once i flashed to cm10 the led colors corrected themselves.

The developer for light flow had already escalated this to Samsung engineering. Touchwhiz screwed up the codes used to change the LED colors. That's why flashing a non Touchwhiz rom fixes it. We just have to wait for Samsung to issue an update or for Light Flow to figure out a workaround.
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The lightflow Known Issues page has the best map of the color I have seen. It's about halfway down the page.

Thank you for that... i love how samsung always seems to jumble something lol
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I'm using cm10 and almost all the colors didn't work, whatever color I chose it showed up red except for magenta color and purple the rest showed up as red led's
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Nexus 4 Display control

Has any of you tried this app yet? maybe its useful to get rid of the yellow tint of the nexus 4? It was made by Francisco Franco
https://play.google.com/store/apps/details?id=com.nexus4displaycontrol

Judging by the reviews it should work. I know im getting it once i receive my N4.

It does work. I just don't know what each setting combinations look the best.
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drew_grant said:
It does work. I just don't know what each setting combinations look the best.
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To me (for the time being) whatever makes the yellow tint dissappear , can't wait to have my Nexus 4 to try it
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Chad_Petree said:
To me (for the time being) whatever makes the yellow tint dissappear , can't wait to have my Nexus 4 to try it
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Click to expand...
Click to collapse
Trust me that's what I'm going for!
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drew_grant said:
It does work. I just don't know what each setting combinations look the best.
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Click to expand...
Click to collapse
I don't notice yellowing yet. Guess if it appears, I know how to fix it now. Since it looks like software, why isn't this fixed?

Can someone post their settings for this app. Black's are too light and colors not as vibrant as when using cm calibration settings on the previous nexus'
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kyleds said:
Can someone post their settings for this app. Black's are too light and colors not as vibrant as when using cm calibration settings on the previous nexus'
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This is a different type of screen. Blacks will not be as deep nor colors will it be as saturated as super amoled. As far as settings I use 255 190 255.
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I use Fauxclock. It's got CPU/GPU clock and voltage control, in addition to color (and gamma, when ROMs/kernels begin to support it). You can also select an IO scheduler.
Basically it does all the same stuff as Voltage Control, SetCPU, Incredicontrol, and N4 Display Control, but it's in one app so it's overall cheaper.

I went to a Best Buy today and compared my N4's screen directly to a Optimus G. I didn't actually think my screen looked yellow at all until I compared it to the Optimus G. My N4's screen looked terribly yellow, was less bright, and had worse viewing angles than both of the Optimus G's my local Best Buy had on display.
Based off the first post in this thread for the GNex, I set my Nexus 4 to settings of:
182
190
200
I haven't tinkered too much but this seems to make things a bit better.
Has anyone else experienced the screen turning very yellow, almost brown, when viewing from the corners of the device? I am pretty unhappy with the viewing angles on the phone, especially after comparing it to the Optimus G, which is supposed to have the same display.

thunderinacircle said:
I went to a Best Buy today and compared my N4's screen directly to a Optimus G. I didn't actually think my screen looked yellow at all until I compared it to the Optimus G. My N4's screen looked terribly yellow, was less bright, and had worse viewing angles than both of the Optimus G's my local Best Buy had on display.
Based off the first post in this thread for the GNex, I set my Nexus 4 to settings of:
182
190
200
I haven't tinkered too much but this seems to make things a bit better.
Has anyone else experienced the screen turning very yellow, almost brown, when viewing from the corners of the device? I am pretty unhappy with the viewing angles on the phone, especially after comparing it to the Optimus G, which is supposed to have the same display.
Click to expand...
Click to collapse
Do you think there is a limit set on the brightness maybe a dev could unlock that limit to make the phone more brighter

edit: WRONG THREAD

IAmAN00bie said:
This app puts an overlay on top of your screen, so it doesn't really "change" your display colors. Also: the overlay should disappear when you try to install an app because of the security issues with having one in place when trying to install an app. I believe Lux and other similar apps do this too.
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Click to collapse
But why you can't see it on a screenshot then?

I'm using 185,190, and 220. Looks better than default
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IAmAN00bie said:
This app puts an overlay on top of your screen, so it doesn't really "change" your display colors. Also: the overlay should disappear when you try to install an app because of the security issues with having one in place when trying to install an app. I believe Lux and other similar apps do this too.
Click to expand...
Click to collapse
The screen settings definitely do not change when you attempt to install a different app.
Why do you say this is just an overlay? It is baked into the kernel.

thunderinacircle said:
The screen settings definitely do not change when you attempt to install a different app.
Why do you say this is just an overlay? It is baked into the kernel.
Click to expand...
Click to collapse
Hahaha... posted in the wrong thread, sorry. I had another tab open for another Display control app that worked without custom kernel/root.

Hi,
I have tried to find the best settings with my professionnal X-Rite eye-one display 2 screen calibrator and I've ended with these settings :
238
228
240

Sebacestmoi said:
Hi,
I have tried to find the best settings with my professionnal X-Rite eye-one display 2 screen calibrator and I've ended with these settings :
238
228
240
Click to expand...
Click to collapse
Thanks for these settings! I myself have a spyder 4 but applying your settings has made the screen much better! Thank you.

Everyone should check out the public spreadsheet in my sig.
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Sebacestmoi said:
Hi,
I have tried to find the best settings with my professionnal X-Rite eye-one display 2 screen calibrator and I've ended with these settings :
238
228
240
Click to expand...
Click to collapse
did you get a chance to recalibrate it after installing franco-r14?

How to fix pink pixels

I had a pink line running up and down my screen on the right side which was awful on white screens. I noticed a lot of people have also been complaining of pink blotches or something of the sort.
I did a little something most commonly used on TV.
go to dialer and press
*#0*#
it'll take you to a test screen.
press on red, blue, green on the top and see which pixels need to be re learned.
keep the phone on each of the 3 color screens for a few minutes each.
it should start to fade the pink away
if it doesn't, repeat.
normally it's the red where the pixels are most noticeably out on.
give the process and repetition some time. it should seriously help get your pink screens right again!
my pink line is gone!
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Ive got a pinkish hue across the bottom. and this doesnt appear to be working on cyanogenmod for me ("Connection problem or invalid MMI code")
Is there any difference to just leaving a full screen pure red, pure green, or pure blue (255,0,0 , 0,255,0 , 0,0,255) image on the screen, or does it do some fancier other things in the background?
Alternatively, is this hardware or software based fixing/learning? If I revert to stock, run this, then return to cyanogenmod will it still be fixed?

bisby said:
Ive got a pinkish hue across the bottom. and this doesnt appear to be working on cyanogenmod for me ("Connection problem or invalid MMI code")
Is there any difference to just leaving a full screen pure red, pure green, or pure blue (255,0,0 , 0,255,0 , 0,0,255) image on the screen, or does it do some fancier other things in the background?
Alternatively, is this hardware or software based fixing/learning? If I revert to stock, run this, then return to cyanogenmod will it still be fixed?
Click to expand...
Click to collapse
Just flash a Stock Based ROM (much easier then Odin) and then run the codes. Yes it should fix it when you flash back to CM hoping that this fix is a true fix. I am also guessing that the codes do a little more than just holding a colored image on the screen. Might be wrong on that but who knows.

It's proprietary Samsung service mode. Only works on touchwiz roms
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Glad to hear you were able to fix the issue! I had a vertical pixel width line on the first gs4 I got before I exchanged it. Although I am pretty sure that mine was a hardware problem because it was always there, even when in the bootloader and startup animations.
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lysergication said:
Glad to hear you were able to fix the issue! I had a vertical pixel width line on the first gs4 I got before I exchanged it. Although I am pretty sure that mine was a hardware problem because it was always there, even when in the bootloader and startup animations.
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Click to collapse
yeah so was mine. this is a lot like the color code pixel reset on plasma and LCD TVs.
and yes it must be touchwiz because it's a code for that software. I am not sure if Cm has one yet
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I have a pink hue in the upper side of my screen :'( and this workaround is not fixing it.
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nightfox11 said:
I have a pink hue in the upper side of my screen :'( and this workaround is not fixing it.
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Click to expand...
Click to collapse
you need to run each color for a while. see which color had the dead pixels in it and run it for a hood bit
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Worked for me, thx!

SuiSid3l said:
Worked for me, thx!
Click to expand...
Click to collapse
What exactly did this fix for u?
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pezlomd said:
What exactly did this fix for u?
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Click to expand...
Click to collapse
some pixels die or lose their appropriate color memory.
my issue was a thin pink line running down my screen.
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Dude i too have small pink line issue on my note 2.....that pixel can be seen on green colur...small black pixel line can be seen on green colour...for 3mins...it will be blinking..can i fix it

pink pixel when you get a screen problem then you just think its display problem and change the display with same model so you can solve pink pixel.

Zombie.
Pp.
sent from my P5113 using TouchPal mind control keyboard. (Beta)

This method takes a lot of time? . How long did it take you?
How long did it take to remove the line?
Hardcore69er said:
I had a pink line running up and down my screen on the right side which was awful on white screens. I noticed a lot of people have also been complaining of pink blotches or something of the sort.
I did a little something most commonly used on TV.
go to dialer and press
*#0*#
it'll take you to a test screen.
press on red, blue, green on the top and see which pixels need to be re learned.
keep the phone on each of the 3 color screens for a few minutes each.
it should start to fade the pink away
if it doesn't, repeat.
normally it's the red where the pixels are most noticeably out on.
give the process and repetition some time. it should seriously help get your pink screens right again!
my pink line is gone!
Sent from my SGH-M919 using xda app-developers app
Click to expand...
Click to collapse

I am using samsung note 3 and I hav a pink line running upside down ... I have gone through that color test.. On green color it disappears .. What I am supposed to be doing next ?

My note 3 n900a has a pink line and i got it a few days after installing touchwiz rom how can i solve it ??? Plz Help on green color it dissapears ...

I know this topic is old but I THINK u just helped me fix my S6 Edge.

Yeah.....thnk u For ur advice....but if we keep our phone on each color for a few minutes the screen turns out to be white with many blocks in spiral shape like a DNA strand .....what to do ahead..it doesn't even go back...I had to restart my phone...

I have bought Samsung s7 edge before 5days and now today pink vertical line are came in the screen what the hell is that ???

Red color problem

Hello. Few months ago I noticed that screen doesn ´t show red color well. Screen has sometimes some kind of stripes. Definitely it is not normal. Has anyone same experience?

...

Try fiddling around with the screen settings in Trickster MOD
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So I noticed that it is not only red color problem, but red is worse.
When I set brightness to 50 % and more I can notice any stripes.
Is this something bad and should I worry about it?

I have the same problem , it's so annoying
If any one have a solution for this , please help us

I also have this problem. I think it is a screen burn in. I see it when displaying white colors and red. But with red it is way more obvious. I tried apps tot fix it with no luck.
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Can anyone explain this problem ? and why it's happening to us ?
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