[Q] What are Gamma settings? - Nexus 4 Q&A, Help & Troubleshooting

What exactly does gamma do?
I read somewhere that you can tweak gamma settings with no effect on battery life. So you can turn the screen brightness to the minimum and raise a color setting to make the screen contrast better.
It seems to be a popular feature in kernels, but what exactly do people aim to achieve by changing their gamma settings, I don't get it...

quoting myself from another thread:
dagaetch said:
2.2 is the value you want. As for why, see http://www.cambridgeincolour.com/tutorials/gamma-correction.htm; basically, electronic images are biased a certain way, and gamma correction is intended to remove that bias. since screens are different, you need different settings to correct the appropriate amount to reach 2.2, which apparently became the industry standard at some point.
Click to expand...
Click to collapse

It seems to be a popular feature in kernels, but what exactly do people aim to achieve by changing their gamma settings, I don't get it...
Click to expand...
Click to collapse
we aim at making our eyes happy

dagaetch said:
quoting myself from another thread:
Click to expand...
Click to collapse
Thank You! I think that pretty much halfway answers my question.
Now I wonder the effects of gamma settings on battery, and what brightness/gamma configuration is more 'eye pleasing'.
Is there a general consensious on what that configuration miht be on the Nexus 4 or will I have to play with settings to find out my own?

mastrgamr said:
Thank You! I think that pretty much halfway answers my question.
Now I wonder the effects of gamma settings on battery, and what brightness/gamma configuration is more 'eye pleasing'.
Is there a general consensious on what that configuration miht be on the Nexus 4 or will I have to play with settings to find out my own?
Click to expand...
Click to collapse
There's a few presets that you can find on xda but in reality they'll all need tweaked a bit. Like the other guy said, every screens different.
Nexus 4
ATT Straight Talk $45/mo
running xylon 2.1 4.2.2 faux kernel

mastrgamr said:
Now I wonder the effects of gamma settings on battery, and what brightness/gamma configuration is more 'eye pleasing'.
Click to expand...
Click to collapse
No effect on the battery. This phone has an LCD screen with a backlight, so no matter the colours, the battery drain is the same. The only possible side effect is of your gamma tuning leaves your screen so dark that you have to bump the brightness, which could affect the battery.
Sent from my Nexus 4

Related

[BOUNTY] Manually adjusting autobrightness levels. $60.

I'd like to start this bounty thread with a $50 offering.
The requirement is to hack official HTC Sense roms to be able to set levels of brightness which autobrightness uses.
It could be done via an app, or a file edit, or the way cm6.1 does it. And it should be supported for the future OTA releases.
The only true requirement is that I never have to worry about setting brightness again, after I tweak the brightness values to my own eyes.
(technical: autobrightness adjusts the brightness of the lcd by reading the light level sensor. CM6 allows one to edit the table of brightness vs. light sensor. Sense might implement the autobrightness differently. Regardless of the implementation, the default values of brightness, that autobrightness uses, should be adjustable.)
In for $10
Sent from my PC36100 using XDA App
....have you tried using spare parts..... there is a setting for that in the application
oshizzle1991 said:
....have you tried using spare parts..... there is a setting for that in the application
Click to expand...
Click to collapse
Sorry. No, there isn't.
Bounty updated.
edit your /system/build.prop from
Code:
# default value of brightness
settings.display.brightness=143
to whatever you would like. higher is brighter, lower is darker. xD
if this works for you, heres my donate link.
es0tericcha0s said:
edit your /system/build.prop from
Code:
# default value of brightness
settings.display.brightness=143
to whatever you would like. higher is brighter, lower is darker. xD
if this works for you, heres my donate link.
Click to expand...
Click to collapse
Sorry, what is this?
nabbed said:
Sorry, what is this?
Click to expand...
Click to collapse
It's your build.prop, located in /system, just like he said.
es0tericcha0s said:
edit your /system/build.prop from
Code:
# default value of brightness
settings.display.brightness=143
to whatever you would like. higher is brighter, lower is darker. xD
if this works for you, heres my donate link.
Click to expand...
Click to collapse
Thanks might make that adjustment in my next ROM.
es0tericcha0s said:
edit your /system/build.prop from
Code:
# default value of brightness
settings.display.brightness=143
to whatever you would like. higher is brighter, lower is darker. xD
if this works for you, heres my donate link.
Click to expand...
Click to collapse
That really has nothing to do what I was asking about in the op.
nabbed said:
That really has nothing to do what I was asking about in the op.
Click to expand...
Click to collapse
Try the CM6 nightlies, they have exactly what you are asking for.
dkelle4 said:
Try the CM6 nightlies, they have exactly what you are asking for.
Click to expand...
Click to collapse
The point is to do it in sense roms.
How does it not? that edit in your build prop will set the auto brightness level. Are you looking for an app or something?
Sent from my ADR6300 using XDA App
nabbed said:
I'd like to start this bounty thread with a $50 offering.
The requirement is to hack official HTC Sense roms to be able to set levels of brightness which autobrightness uses.
It could be done via an app, or a file edit, or the way cm6.1 does it. And it should be supported for the future OTA releases.
The only true requirement is that I never have to worry about setting brightness again, after I tweak the brightness values to my own eyes.
(technical: autobrightness adjusts the brightness of the lcd by reading the light level sensor. CM6 allows one to edit the table of brightness vs. light sensor. Sense might implement the autobrightness differently. Regardless of the implementation, the default values of brightness, that autobrightness uses, should be adjustable.)
Click to expand...
Click to collapse
Seems to be exactly what you asked for?
Sent from my ADR6300 using XDA App
nabbed said:
It could be done via an app, or a file edit, or the way cm6.1 does it.
Click to expand...
Click to collapse
He provided what you asked for, edit the file and you got it!
Sent from my HTC Evo 4G using XDA App
I would like this issue to be fixed as well, but am curious to know how much a table would actually help. It seems that it may not be as bright outside as it is inside sometimes, but the sun reflects light a lot worse than a ton of florescent or artificial light does. When i am inside and all the lights are on, i can still read my phone with the brightness at 15%. But when its cloudy outside it needs to be at 100% or its hard to read from a direct angle. I would almost prefer to leave my brightness at 15% all the time, and then use a hardware switch like hitting both volume rockers together to toggle 100% and 15% to change the brightness.
It would be awesome if the evo used the front facing camera to detect the sky behind you or even use the better light senser in a camera, to detect and adjust the brightness. Probably not great for battery.
auradefect said:
He provided what you asked for, edit the file and you got it!
Sent from my HTC Evo 4G using XDA App
Click to expand...
Click to collapse
How does changing that setting qualify for manually adjusting autobrightness values?
Here's how cm6 does it. It creates a table:
Light Sensor level - Brightness
10 - 50
160 - 60
225 - 70
320 - 80
640 - 110
1280 - 140
2600 - 180
infinity - 255(max)
The autobrightness reads the light sensor level and then sets the brightness to the corresponding brightness value.
S4Rs said:
I would like this issue to be fixed as well, but am curious to know how much a table would actually help. It seems that it may not be as bright outside as it is inside sometimes, but the sun reflects light a lot worse than a ton of florescent or artificial light does. When i am inside and all the lights are on, i can still read my phone with the brightness at 15%. But when its cloudy outside it needs to be at 100% or its hard to read from a direct angle. I would almost prefer to leave my brightness at 15% all the time, and then use a hardware switch like hitting both volume rockers together to toggle 100% and 15% to change the brightness.
It would be awesome if the evo used the front facing camera to detect the sky behind you or even use the better light senser in a camera, to detect and adjust the brightness. Probably not great for battery.
Click to expand...
Click to collapse
It works very well in cm6. It's not perfect, but when I was using cm6, I never had to worry about tinkering with brightness.
Moved to General
egzthunder1 said:
Moved to General
Click to expand...
Click to collapse
I'm sorry, how are developers going to find this thread now?
nabbed said:
I'm sorry, how are developers going to find this thread now?
Click to expand...
Click to collapse
Dev is for people posting roms, kernels, software in development, not for posting "requests for development" and is probably why it was moved.
Sent on the go from my HTC EVO

Green Screen Syndrome

Its just a **** load of hyperbole.
Go into Voodoo Sound and scroll down to "Voodoo Color" and adjust the sliders.
NO ONE has the same screen/eye combo so what looks smexy for the kernel dev might look like a drunk heffer to you.
Personally my phone doesn't experience the green screen because I sat there and adjusted each value till I got the color reproduction I wanted (it may not be "true white" but I like my vibrantness ) so people, get off your asses and make your phone YOUR PHONE by putting in what you feel is the most comfty for your eyes.
If that's too much for you and you'd rather wait for the kernel devs to **** up their colors on their screen so that your BASE colors may or may not be correct, then maybe you shouldn't be worried about color and just stick with stock dull values.
Sent from my SPH-D700 using xda premium
Share your settings?!
Sent from my SPH-D700 using Tapatalk
A_Flying_Fox said:
Its just a **** load of hyperbole.
Go into Voodoo Sound and scroll down to "Voodoo Color" and adjust the sliders.
NO ONE has the same screen/eye combo so what looks smexy for the kernel dev might look like a drunk heffer to you.
Personally my phone doesn't experience the green screen because I sat there and adjusted each value till I got the color reproduction I wanted (it may not be "true white" but I like my vibrantness ) so people, get off your asses and make your phone YOUR PHONE by putting in what you feel is the most comfty for your eyes.
If that's too much for you and you'd rather wait for the kernel devs to **** up their colors on their screen so that your BASE colors may or may not be correct, then maybe you shouldn't be worried about color and just stick with stock dull values.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
is there a purpose for this thread? we all know that and we all tell those who have that problem. Its simple adjust to where its in the middle nothing much or to little is all.
@ omair2005 try this on Screen Gama Hack v1 red,blue,green try all set to -35
and for RGB multiplier try 260......, 260........, 429.......
XxLostSoulxX said:
is there a purpose for this thread? we all know that and we all tell those who have that problem. Its simple adjust to where its in the middle nothing much or to little is all.
@ omair2005 try this on Screen Gama Hack v1 red,blue,green try all set to -35
and for RGB multiplier try 260......, 260........, 429.......
Click to expand...
Click to collapse
Wow, those yield a nice result! Thanks to soul-man!
Sent from my SPH-D700 using xda premium
orlzzt said:
Wow, those yield a nice result! Thanks to soul-man!
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
No problem hope it didn't sound to mean at the beginning but I see it more of a we already know basis or it should be turned into a suggestion of settings thread
Sent from my SPH-D700 using xda premium
XxLostSoulxX said:
No problem hope it didn't sound to mean at the beginning but I see it more of a we already know basis or it should be turned into a suggestion of settings thread
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
Lol really? All I see in every rom thread is "my screen is green I flashed this kernel cuz I want voodoo color but I can't be bothered to read through 50 pages to see the fix". And the replies are all "SEARCH!!1!11ONE!!"
The purpose of this thread is so people who have the green screen can open and see how their laziness contributes to their problem.
I am all in favor of turning this into a settings discussion but the main purpose has been stated
Also, my settings are very inaccurate, not true colors at all lol but just raise your gamma a tiny bit and everything will be good
A_Flying_Fox said:
Lol really? All I see in every rom thread is "my screen is green I flashed this kernel cuz I want voodoo color but I can't be bothered to read through 50 pages to see the fix". And the replies are all "SEARCH!!1!11ONE!!"
The purpose of this thread is so people who have the green screen can open and see how their laziness contributes to their problem.
I am all in favor of turning this into a settings discussion but the main purpose has been stated
Also, my settings are very inaccurate, not true colors at all lol but just raise your gamma a tiny bit and everything will be good
Click to expand...
Click to collapse
I see your point but i guess were just trying to get them to be less lazy is all haha, and voodoo color will depend on each kernel like shadow vs samurai but there kind of identical so pretty much same settings should give same results.
A_Flying_Fox said:
Lol really? All I see in every rom thread is "my screen is green I flashed this kernel cuz I want voodoo color but I can't be bothered to read through 50 pages to see the fix". And the replies are all "SEARCH!!1!11ONE!!"
The purpose of this thread is so people who have the green screen can open and see how their laziness contributes to their problem.
I am all in favor of turning this into a settings discussion but the main purpose has been stated
Also, my settings are very inaccurate, not true colors at all lol but just raise your gamma a tiny bit and everything will be good
Click to expand...
Click to collapse
If by green screen, you mean the flash of green everytime I unlock my phone, then its not "laziness" that contributes to the problem, its the ShadowKernel. I am not going to raise my gamma settings so that the screen is completely washed out just so the green flash doesn't happen when I unlock my phone. I have been using voodoo color for a LONG time spanning multiple versions of androids and at least a half a dozen different kernels, and this is a the ONLY one that has had this problem. I have always used the "punchy" setting, and this is the only time I have ever seen that green flash.
I had the same green screen problem then I turned off automatic brightness and it stopped.
Sent from my SPH-D700 using XDA
muyoso said:
If by green screen, you mean the flash of green everytime I unlock my phone, then its not "laziness" that contributes to the problem, its the ShadowKernel. I am not going to raise my gamma settings so that the screen is completely washed out just so the green flash doesn't happen when I unlock my phone. I have been using voodoo color for a LONG time spanning multiple versions of androids and at least a half a dozen different kernels, and this is a the ONLY one that has had this problem. I have always used the "punchy" setting, and this is the only time I have ever seen that green flash.
Click to expand...
Click to collapse
I am having the same issue with Samurai MTD kernel. I don't know that it's kernel related. But then, I don't know much...
orlzzt said:
I am having the same issue with Samurai MTD kernel. I don't know that it's kernel related. But then, I don't know much...
Click to expand...
Click to collapse
Its probably the combination of voodoo color and ics.
Sent from my SPH-D700 using XDA
muyoso said:
If by green screen, you mean the flash of green everytime I unlock my phone, then its not "laziness" that contributes to the problem, its the ShadowKernel. I am not going to raise my gamma settings so that the screen is completely washed out just so the green flash doesn't happen when I unlock my phone. I have been using voodoo color for a LONG time spanning multiple versions of androids and at least a half a dozen different kernels, and this is a the ONLY one that has had this problem. I have always used the "punchy" setting, and this is the only time I have ever seen that green flash.
Click to expand...
Click to collapse
Its definitely your laziness giving you the green screen.
People moaned and groaned to bbelos about how he should incorporate custom settings into shadow so that they can have nice ass colors out the box, and on bbelos phone it can handle low gamma obviously which is why the gamma is so low and he put his values in and everyone expected it to lookk the same on their phones and couldn't be bothered with no type of personalization on their part.
If you can't manage to slide your gamma bars a little to the right to correct this problem, then don't complain when the fix is posted. You've obviously never bothered to mess with the sliders because if you did, you would've seen how much raising the gamma 2 values "washes out the screen".
Don't try to throw your $.02 in if you can't even bother to try it, otherwise your opinion is one sided and void.
Sent from my SPH-D700 using xda premium
orlzzt said:
I am having the same issue with Samurai MTD kernel. I don't know that it's kernel related. But then, I don't know much...
Click to expand...
Click to collapse
Its definitely kernel related.
Remember, samurai was a (very stable) hackjob kernel, pulling bits and pieces from every other kernel he can find.
I don't **** with samurai, but I'm pretty sure he has custom values set too, which will affect more phones than benefitting them
Sent from my SPH-D700 using xda premium
muyoso said:
Its probably the combination of voodoo color and ics.
Sent from my SPH-D700 using XDA
Click to expand...
Click to collapse
Nah people *****ed about it on cm7 as well
Sent from my SPH-D700 using xda premium
A_Flying_Fox said:
Its definitely your laziness giving you the green screen.
People moaned and groaned to bbelos about how he should incorporate custom settings into shadow so that they can have nice ass colors out the box, and on bbelos phone it can handle low gamma obviously which is why the gamma is so low and he put his values in and everyone expected it to lookk the same on their phones and couldn't be bothered with no type of personalization on their part.
If you can't manage to slide your gamma bars a little to the right to correct this problem, then don't complain when the fix is posted. You've obviously never bothered to mess with the sliders because if you did, you would've seen how much raising the gamma 2 values "washes out the screen".
Don't try to throw your $.02 in if you can't even bother to try it, otherwise your opinion is one sided and void.
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
You're a blithering idiot who didn't even read my post. Making my screen look like **** isn't a "fix". I have run the "punchy" gamma settings on multiple roms and multiple versions of Android, and NEVER had a green flash when waking the device . . . . . until CM9 and Voodoo Color.
I like how my phone looks with all of the gamma settings set to -45. Yet you are telling me the FIX is to set them to -43? Hint, it still happens when the gamma is set to -30 for all values, and the screen looks significantly ****tier.
I do love how you make assumptions though and freely insult others based solely on your own arrogance. Its very cute.
muyoso said:
You're a blithering idiot who didn't even read my post. Making my screen look like **** isn't a "fix". I have run the "punchy" gamma settings on multiple roms and multiple versions of Android, and NEVER had a green flash when waking the device . . . . . until CM9 and Voodoo Color.
I like how my phone looks with all of the gamma settings set to -45. Yet you are telling me the FIX is to set them to -43? Hint, it still happens when the gamma is set to -30 for all values, and the screen looks significantly ****tier.
I do love how you make assumptions though and freely insult others based solely on your own arrogance. Its very cute.
Click to expand...
Click to collapse
Calm down. I wonder, if voodoo color just doesn't work they way you want it to, after messing with the sliders and you still aren't satisfied.. wouldn't it be best just to leave it alone?
Sent from my SPH-D700 using xda premium

Any ROMS or Kernels fixing wash-out issues (Esp. Blacks)

Hello All,
Anyone know of any good Kernels or ROM's that have color fixes for the Nexus 7's washed out blacks. I'm not sure if it's just the limitations of the LCD but I find the blacks are pretty much dark greys in almost all instances, even with proper brightness settings.
I know on my Gnex there's been Kernels that have optimized the colors to display more true. Any ideas or personal experiences with similar things out there for the N7?
Thanks in advance!
it's the question i'm asking from some days...already wrote this in some 3ad,hope that a kernel dev (devs)at some time port the colours\gamma\contrast\multipliers tweaks laso on n7.i don't know if it's possible to have it on lcd panel and tegra3 Soc...but anyway,i don't receice a negative response...(yet)and i'm quite expectant..
Yer as of now...no. all we can do is hope. All we really need is a gamma interface. Maybe a contrast to, but I'd say mainly gamma imo.
Sent from my Nexus 7 using Tapatalk 2
leelaa said:
Yer as of now...no. all we can do is hope. All we really need is a gamma interface. Maybe a contrast to, but I'd say mainly gamma imo.
Sent from my Nexus 7 using Tapatalk 2
Click to expand...
Click to collapse
you are right..the gamma interface is the most needed.finger crossed
I'm very new Nexus 7 user but from what i've gathered by now it looks like we have to beg franco (franco.Kernel developer) to add gamma controls to his app, just as we have on Galaxy Nexus.
Sent from my Nexus 7
MS. said:
I'm very new Nexus 7 user but from what i've gathered by now it looks like we have to beg franco (franco.Kernel developer) to add gamma controls to his app, just as we have on Galaxy Nexus.
Sent from my Nexus 7
Click to expand...
Click to collapse
it has nothing to do with begging Francisco(or morfic, hes been begged at too). it has everything to do with the options not available for the screen itself. if it was possible, both of them would have added it. its not like the user friendly samoled screens of the nexus s and galaxy nexus. the lcd screen of the nexus 7 is not comparable to the amoled and samoled screens. the manufacturer of the lcd screen did not give us the options(to enable in custom kernels). yes, thats all Francisco and morfic did in the ns and gnex, enable and tweak options that were already there. they didnt magically hack in those options.
simms22 said:
it has nothing to do with begging Francisco(or morfic, hes been begged at too). it has everything to do with the options not available for the screen itself. if it was possible, both of them would have added it. its not like the user friendly samoled screens of the nexus s and galaxy nexus. the lcd screen of the nexus 7 is not comparable to the amoled and samoled screens. the manacture of the lcd screen did not give us the options(to enable in custom kernels). yes, thats all Francisco and morfic did in the ns and gnex, enable and tweak options that were already there. they didnt magically hack in those options.
Click to expand...
Click to collapse
Thank you simms
MS. said:
I'm very new Nexus 7 user but from what i've gathered by now it looks like we have to beg franco (franco.Kernel developer) to add gamma controls to his app, just as we have on Galaxy Nexus.
Sent from my Nexus 7
Click to expand...
Click to collapse
seriously you thinked that was so easy?if it's so easy we already have those options working man!
well...now with last comments,i have the prove that isn't possible on this display..until now i thinked that there were little possibilities to do this.now i stop hope!
simms22 said:
it has nothing to do with begging Francisco(or morfic, hes been begged at too). it has everything to do with the options not available for the screen itself. if it was possible, both of them would have added it. its not like the user friendly samoled screens of the nexus s and galaxy nexus. the lcd screen of the nexus 7 is not comparable to the amoled and samoled screens. the manacture of the lcd screen did not give us the options(to enable in custom kernels). yes, thats all Francisco and morfic did in the ns and gnex, enable and tweak options that were already there. they didnt magically hack in those options.
Click to expand...
Click to collapse
That doesn't sound good but thanks. It's really hard to believe that there's no option to adjust gamma settings... I have no clue on how it works but with Linux i can edit gamma settings despite which distro/kernel/GPU/chipset i use. Wierd.
Sent from my Nexus 7
Edit: after all these answers, pfffffff
MS. said:
That doesn't sound good but thanks. It's really hard to believe that there's no option to adjust gamma settings... I have no clue on how it works but with Linux i can edit gamma settings despite which distro/kernel/GPU/chipset i use. Wierd.
Sent from my Nexus 7
Edit: after all these answers, pfffffff
Click to expand...
Click to collapse
we are still hopeful that there is. if its in there, no one has found it yet, but many have looked. theres always a chance that they are hidden very well. ill remain on your side, hopeful.
heres a collection of scripts put together by Metallice, it saves me typing them all out(thanks Metallice ), to turn off/on the smart dimmer. itll help prevent screen washout after watching videos(or gaming i think).

Gpad screen gamma is too low

Some of you may have noticed it's difficult to watch dark scenes in movies on the gpad. I think the problem is the gamma calibration, you can see it clearly on the pictures I took.
https://imageshack.com/i/nf96iaj
On the top you can see my nexus 7 2013, you can differentiate all the shades of grey from 1% white to 100%.
On the gpad, everything is solid black from 1% to 12% of white.
You can find the original image here : http://imageshack.us/f/594/6291.png/
How low can you go, on your gpad, before the grey melts with the black ?
Do you know an app to apply gamma correction ?
Here you can see the same picture on the N7 and the gpad. You can't even distinguish the guy's ear on the g pad.
https://imageshack.com/i/f563trj
bobo69 said:
Some of you may have noticed it's difficult to watch dark scenes in movies on the gpad. I think the problem is the gamma calibration, you can see it clearly on the pictures I took.
https://imageshack.com/i/nf96iaj
On the top you can see my nexus 7 2013, you can differentiate all the shades of grey from 1% white to 100%.
On the gpad, everything is solid black from 1% to 12% of white.
You can find the original image here : http://imageshack.us/f/594/6291.png/
How low can you go, on your gpad, before the grey melts with the black ?
Do you know an app to apply gamma correction ?
Here you can see the same picture on the N7 and the gpad. You can't even distinguish the guy's ear on the g pad.
https://imageshack.com/i/f563trj
Click to expand...
Click to collapse
I see the difference, and I knew it was there already also.. I'm sorry, but apparently gamma is not something that is doable. - I was looking to link you the app from market called "Screen Adjuster", however you want to look at this description, especially the last sentence. ;/
- dimming the screen 15-100% (below minimum system brightness)
- screen color and a contrast adjustment
- system brightness 0-100% adjustment
- functional widget (on/off, system brightness, settings)
- autorun option
Some phones have a color tint screen. This app have a possibility to try to improve colors on this kind of the screen by setting an additional factor RGB.*
The range of the dimmer is from 15% to 100% (it allows to dim the screen below a min system brightness value). Make a relief for your eyes during a nightly reading.
Furthermore, you can change fast the system brightness too.
The additional contrast factor can try to make the reading or a picture viewing more comfortable on some screens.*
The widget provides fast on/off service with a shortcuts to the Adjuster settings and the system brightness settings.
The application has the autorun option which works with the dimmer set above 22% (for the safety).
Note
A gamma adjustment is not possible to do.
You can of course try and download the app anyways and see if contrast or brightness will do anything for ya.
- In case you do download the app, remember that setting contrast low will result in problems with installing apps, as in you cannot hit Install, only cancel. To avoid this, open up Screen Adjuster and turn it off, install the app and turn it back on afterwards. It's something about lowering the settings to lower than what is "intended", I don't quite understand it and I find it rather odd. But it let's you install apps.. So I guess hooray.
That's all I got.
CuraeL said:
I see the difference, and I knew it was there already also.. I'm sorry, but apparently gamma is not something that is doable. - I was looking to link you the app from market called "Screen Adjuster", however you want to look at this description, especially the last sentence. ;/
That's all I got.
Click to expand...
Click to collapse
Thank you for your response, but I'm already using screen adjuster. I set the contrast at -25 and it helps a lot to see dark details.
Unfortunately, it has two side effects :
- it brightens the dark shades of grey, but also the black levels.
- I noticed that the contrast setting also affects the white making it look like light grey.
So the contrast setting in screen adjuster doesn't affects only the dark tones like it would on a monitor or a tv, it affects the contrast ratio.
I've found apps to make gamma adustment but it only works on some devices with custom kernel.
https://play.google.com/store/apps/details?id=com.teamkang.fauxclock&hl=fr
- Gamma curve (Galaxy Nexus, Nexus 4, HTC One, Nexus 7 2013)
bobo69 said:
Thank you for your response, but I'm already using screen adjuster. I set the contrast at -25 and it helps a lot to see dark details.
Unfortunately, it has two side effects :
- it brightens the dark shades of grey, but also the black levels.
- I noticed that the contrast setting also affects the white making it look like light grey.
So the contrast setting in screen adjuster doesn't affects only the dark tones like it would on a monitor or a tv, it affects the contrast ratio.
I've found apps to make gamma adustment but it only works on some devices with custom kernel.
https://play.google.com/store/apps/details?id=com.teamkang.fauxclock&hl=fr
- Gamma curve (Galaxy Nexus, Nexus 4, HTC One, Nexus 7 2013)
Click to expand...
Click to collapse
Yea, I was about to say that gamma can be done but only on custom kernels. Lot of Nexus 5 stuff on the market. Apparently it's Google who locked the gamma settings completely down but only in 4.4.2. I guess it may work on stock LG Kernel since it's only 4.2.2? I'm afraid we'll have to wait for some kernel support for other roms. That would be awesome. I really hope for some Franco-kernel-glory on this device.
That's what I thought, we need to wait for custom kernels...I hope it will come soon, because it's so frustrating to have such a good screen with bad calibration !
People tends to complain too much about the warm white balance but the gamma calibration is far more concerning.
bobo69 said:
That's what I thought, we need to wait for custom kernels...I hope it will come soon, because it's so frustrating to have such a good screen with bad calibration !
People tends to complain too much about the warm white balance but the gamma calibration is far more concerning.
Click to expand...
Click to collapse
I hope @dalingrin can cook something up to address both. He said he was going to work on something.
joshuadjohnson22 said:
I hope @dalingrin can cook something up to address both. He said he was going to work on something.
Click to expand...
Click to collapse
Yes it would be great if he did , though he's done so much for us already.
Sent from my LG-V500 using XDA Premium 4 mobile app
I see someone had developed a nude kernel for our devices. I welder off they can add support for gamma adjustment
Sent from my LG-V500 using Tapatalk
I am pleased to say my new kernel BOB Kernel v2 has had the gamma corrected
My first post ever
YoungBobbie said:
I am pleased to say my new kernel BOB Kernel v2 has had the gamma corrected
Click to expand...
Click to collapse
Hi there Young Bobbie, I am new to posting on XDA so I couldn't post this in your kernel developer page. This is my first post on any forum page ever. First off, thank you very much for your hard work to make this kernel happen to correct gamma on the v500. I have been sitting on the fence whether to get the gpad, and if i would get the v500 or the v510. Was leaning toward the v510 because of Sleekmason's wonderful kernel work, but it's exciting that we have now have the same options available for the v500. I noticed this was working fully with the Malladus ROM. My question to you was whether or not this worked with stock LG ROM as well? Thank you again YoungBobbie and Sleekmason for your time and creations.
Sorry, just answered my own question. Guess it helps to read the very first line of the page (making fun of myself now ;-P) Thank you again YoungBobbie and sleekmason!!!
themorningwolf said:
Hi there Young Bobbie, I am new to posting on XDA so I couldn't post this in your kernel developer page. This is my first post on any forum page ever. First off, thank you very much for your hard work to make this kernel happen to correct gamma on the v500. I have been sitting on the fence whether to get the gpad, and if i would get the v500 or the v510. Was leaning toward the v510 because of Sleekmason's wonderful kernel work, but it's exciting that we have now have the same options available for the v500. I noticed this was working fully with the Malladus ROM. My question to you was whether or not this worked with stock LG ROM as well? Thank you again YoungBobbie and Sleekmason for your time and creations.
Sorry, just answered my own question. Guess it helps to read the very first line of the page (making fun of myself now ;-P) Thank you again YoungBobbie and sleekmason!!!
Click to expand...
Click to collapse
Gald to have helped would you be willing to try the kernel for the stock LG ROM?
Please take a look at the images below and compare
The tablet on the right is running my kernel and the left stock
You can see the differences on the first image as the deepness of the blacks
and on the second the highlights on the white
I just about to get this tablet, then i so this problem... ?
Sent from Note 3 Superphone!
Bob2702 said:
Gald to have helped would you be willing to try the kernel for the stock LG ROM?
Click to expand...
Click to collapse
Be happy to. Have to acquire the device first, which will be in a matter of a week or 2

Let's figure out how to remove the sharpening.

So I saw this in the build prop
"qualcomm sensors enable
#
# LGE CHANGE_S, 2013-10-29, [email protected]
# below sensor is default true by HAL source.
#ro.qualcomm.sensors.qmd=true
#ro.qc.sdk.sensors.gestures=true
#ro.qualcomm.sensors.pedometer=true
#ro.qc.sensors.step_detector=true
#ro.qc.sensors.step_counter=true
#ro.qualcomm.sensors.pam=true
#ro.qualcomm.sensors.scrn_ortn=true
#ro.qualcomm.sensors.smd=true
#ro.qualcomm.sensors.game_rv=true
#ro.qualcomm.sensors.georv=true
# LGE CHANGE_E, 2013-10-29, [email protected]"
Not sure if anything there can help, but I know that the sharpening is applied when there's something light on a dark background or vice versa and also if you have any type of floating menu it'll sharpen everything in the background.
Samsung does this as well but as far as I know only in multi window mode.
Its not a screen issue as its not always apparent. And as far as I know the oppo find 7 has the same panel and doesn't exhibit these effects.
So anyone have any ideas?
Kernel related ?
Display drivers?
Maybe we should all email lg and ask them for an option to remove it.
Just fyi oppo use japan display inc panel while lg use their own panel
I think the only way to defeat the sharpening is with a custom kernel and possibly an app to tweak the display unless LG of course turn this 'feature' off in the future themselves via an OTA update.
daleski75 said:
I think the only way to defeat the sharpening is with a custom kernel and possibly an app to tweak the display unless LG of course turn this 'feature' off in the future themselves via an OTA update.
Click to expand...
Click to collapse
Hope they do. Its pointless.
So anyways I came across another thing.
If you tune the display with a kernel app as in colors. If you tune all the colors down and make the colors darker and such, everything will have the sharpening applied. So it seems like the software sees that and applies it to everything.
Hoping it's just kernel
Lostatsea23 said:
Hope they do. Its pointless.
So anyways I came across another thing.
If you tune the display with a kernel app as in colors. If you tune all the colors down and make the colors darker and such, everything will have the sharpening applied. So it seems like the software sees that and applies it to everything.
Hoping it's just kernel
Click to expand...
Click to collapse
I am just guessing as I am not a developer by any shape of the imagination but this sounds like it's built into the OS so possibly a tweak to prevent this behaviour from getting triggered which will turn off the sharpening effect.
daleski75 said:
I am just guessing as I am not a developer by any shape of the imagination but this sounds like it's built into the OS so possibly a tweak to prevent this behaviour from getting triggered which will turn off the sharpening effect.
Click to expand...
Click to collapse
Yes I think so. If someone can baksmali the ROM maybe they can find something. Id get in touch with a Dev but as this time it seems like no one owns the device.
Lostatsea23 said:
Yes I think so. If someone can baksmali the ROM maybe they can find something. Id get in touch with a Dev but as this time it seems like no one owns the device.
Click to expand...
Click to collapse
When it finally rolls out to the USA then I think it will get better dev support.
I'll have the device soon, but I'm not sure we're able to turn it off since it may be the part of the driver. Haven't done it yet, but if we can debug the running code and binary patch the trigger effect into not signaling, we may fix it. If it IS a trigger at all; e.g. we should find when it does signal the driver/gpu to apply sharpening and just switch code from JE to JNE or similar to kill the trigger and never apply it.
Theoretically.
Hopefully LG can turn it off and not a hardware combo issue with the 801 and this particular display tech.
It can be turned off. They purposely added it
Lostatsea23 said:
It can be turned off. They purposely added it
Click to expand...
Click to collapse
I wonder if anyone knows the purpose. Because any sane person would turn it off after seeing it in action.
toncij said:
I wonder if anyone knows the purpose. Because any sane person would turn it off after seeing it in action.
Click to expand...
Click to collapse
The purpose is either, they want to emphasize the need for it so they make things extra sharp over 1080p not realizing it actually looks worse when its sharpened. Or its because the contrast ratio is low so to do that they sharpened it in areas where it would be more noticeable to make it more legible. Again, doesn't really help.
On the galaxy phones it would produce this on multi window mode as stated and when putting a cm ROM on it you wouldn't get any of that since there's no window mode. But... If you go into screen settings and change the screen aliasing type or whatever, if you change from standard to reading mode it would make the display sharp exactly like we see on this one. So once we get kernel support for screen modes (cm adds modes such as movie mode and sharpness ect) then we should be fine.
Lostatsea23 said:
The purpose is either, they want to emphasize the need for it so they make things extra sharp over 1080p not realizing it actually looks worse when its sharpened. Or its because the contrast ratio is low so to do that they sharpened it in areas where it would be more noticeable to make it more legible. Again, doesn't really help.
On the galaxy phones it would produce this on multi window mode as stated and when putting a cm ROM on it you wouldn't get any of that since there's no window mode. But... If you go into screen settings and change the screen aliasing type or whatever, if you change from standard to reading mode it would make the display sharp exactly like we see on this one. So once we get kernel support for screen modes (cm adds modes such as movie mode and sharpness ect) then we should be fine.
Click to expand...
Click to collapse
Well, I don't believe a whole bunch of smart engineers, designers and such in dev and QA would not notice it sucks...
And for screen modes, after so much hassle, I hope and expect LG is preparing us a "turn bloody thing off" setting...
Well once it comes out in the states I will be contacting some devs about it. We need a boot loader unlock as well though
toncij said:
I wonder if anyone knows the purpose. Because any sane person would turn it off after seeing it in action.
Click to expand...
Click to collapse
Without seeing it in person, it probably was added to make their simple UI have more of a pop to it. They were probably trying to make it stand out more in stores, like how tvs usually have horrible settings when on display at a store.
flaring afro said:
Without seeing it in person, it probably was added to make their simple UI have more of a pop to it. They were probably trying to make it stand out more in stores, like how tvs usually have horrible settings when on display at a store.
Click to expand...
Click to collapse
They're dumb because it makes it look worse. In almost positive a fix will be found. If anything maybe the carrier releases will have this fixed already.
Guess what...
I installed bravia engine v3 from Android Tweaker 2 and...
I think my display is more clear and the sharpening is slightly gone!
You guys better try it and tell your impression
Sent from my LG-D855 using XDA Free mobile app
haris182 said:
Guess what...
I installed bravia engine v3 from Android Tweaker 2 and...
I think my display is more clear and the sharpening is slightly gone!
You guys better try it and tell your impression
Sent from my LG-D855 using XDA Free mobile app
Click to expand...
Click to collapse
Nope. Exactly the same. Placebo
Sugar pills taste so good
rushless said:
Sugar pills taste so good
Click to expand...
Click to collapse
Lol. If an update to remove this isn't out in the next couple weeks. Bye bye G3

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