yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] mustasusi:
Retention is long gone now since I applied Kcal settings - the main reason to root my device for - using Werewolf kernel along with kernel auditor. The thermal paste is a tribute of appreciation to the CPU doing an amazing job by now and deserves such care from me. I'm glad you have yours repaired though I wouldn't send it in meaning I had to disband my phone for at least a couple days due to above situation.
[LG V20 Guides, News, & Discussion] netgar:
What about brightness? And you are saying we should keep those settings for 20mi? On what screen -> dark or bright? Doesnt matter?

Thx for your help
[LG V20 Guides, News, & Discussion] maxi65:
This setting will simply work with all Conditions
[LG V20 Guides, News, & Discussion] pbedard:
Bump
[LG V20 Guides, News, & Discussion] texasaggie1:
Okay so this fixed it thank you! Is it safe to just leave it on these settings? I am colorblind so I can't even tell the difference
[LG V20 Guides, News, & Discussion] maxi65:
Using this settings from last 3 months and so far no issues.

Feel comfortable :)
[LG V20 Guides, News, & Discussion] texasaggie1:
It's insane how fast the burn in went away.

I hear the pixel 2 is having the same issue
[LG V20 Guides, News, & Discussion] maxi65:
Might be the same settings could fix this issue on pixel 2
[LG V20 Guides, News, & Discussion] texasaggie1:
It really looks like it could be fixed the same way! They are having some saturation issues. Google has put out an update. They added another selection for the way the screen displays. The Google people used to hang out at XDA. Maybe they still do I don't know LOL
[LG V20 Guides, News, & Discussion] maxi65:
I think people should give a try to the exact settings on pixel 2 and see what happens
[LG V20 Guides, News, & Discussion] maxi65:
I now have adjusted my saturation to 65 and colors are super awesome, they're sharp,viberant .
[LG V20 Guides, News, & Discussion] texasaggie1:
I'll give it a try! I'm color blind tho lol.
[LG V20 Guides, News, & Discussion] maxi65:
Okay.. I'll surely be waiting for results :)
[LG V20 Guides, News, & Discussion] texasaggie1:
It's working great for me
[LG V20 Guides, News, & Discussion] MajorChioHazard187:
Any fix without root?I'm using an H990 single sim
[LG V20 Guides, News, & Discussion] manhkaakaa:
Or you can use the app Bluelightfilter on Google play. On setting the level is 10 - 20 % the color background is black. It worked with my device. :)
[LG V20 Guides, News, & Discussion] maxi65:
I'M REALLY SORRY!

This tutorial will only work with a rooted Lg v20
[LG V20 Guides, News, & Discussion] darkknight200:
use this app https://play.google.com/store/apps/details?id=info.papdt.blackblub&hl=en

put it in overlay mode and set the intensity to 80 counting from dark to light. I don't have any retention issues anymore.

It changes the natural pure white of the screen to little darker hue.
[LG V20 Guides, News, & Discussion] astonmartin214:
is this how you get rid of the ghost image cause it sucks seeing that hue after leaving the app

---------- Post added at 07:25 AM ---------- Previous post was at 07:09 AM ----------

where can I find the custom kernal that supports kcal?
[LG V20 Guides, News, & Discussion] Aymenitoo:
You can use sfilter app from play store keep it active all time with 10 % as setting and image burn will gone
[LG V20 Guides, News, & Discussion] darkknight200:
Or go to accessibility>vision>screen color adjustment and then turn on and select manual and use the slider. I was wondering if people used it and found the best color accurate setting and maybe affected white point so retention can be cured?
[LG V20 Guides, News, & Discussion] Mervingio:
Is gone but Everytime any app request SU permission can't press the grant button but when disable this app can press the grant button.
[LG V20 Guides, News, & Discussion] maxi65:
Yes exactly, by applying these settings you can get rid of ghosting effect and screen burn in effect 100% with improved color vibrancy.

Simply google it or Search for your model on Xda lg v20 development section for you. Corresponding model.
[LG V20 Guides, News, & Discussion] maxi65:
Open SuperSU app in your phone and find your application there. Then click on your application, you'll see and option 'access' click on it and select grant. After this Press the ✅ button, permission is permanently granted :)
[LG V20 Guides, News, & Discussion] Mervingio:
Is not that seems the app has this behavior problem with every custom kernel for the LG V20 have the transition bug when you connect to WiFi then connect the data and make or receive a call both sides can't hear anything until you press airplane mode or reboot phone
[LG V20 Guides, News, & Discussion] astonmartin214:
there isn't a model for the V20 it's all under one thread
[LG V20 Guides, News, & Discussion] RichBordoni:
I want to do the same thing. My screen has some pretty noticeable burn-in and the phone gets extremely hot under normal use. Before I open it up to replace the thermal paste and void the warranty, I want to send it in and see what LG will do. (I also paid full price for mine at launch and now I see it going for around $300, so I want to get my money's worth hehe).

Can you tell me how you went about the repair process?

EDIT: Ugh, looks like I'm a week or two out of warranty.
[LG V20 Guides, News, & Discussion] Shadow Assassin:
So, iv been doing a deep-dive into the screen retention problem and I think iv found the cause.

I looked at how they were made and noticed that the substrate is made of glass. Now all the other layers like the matrix, diodes, ect, sit on that piece of glass. If you have ever touched a window with the sun beaming on it, then you know that glass is let high and low temeratures pass through. So, im thinking that just normal heat is heating up that glass and passing through to the other layers cause screen retention.

How to fix it????

Well, thats tricky. We would need something thats probably just less than 1mm thick thats heat resistant to lay between the screen and the rest of the phone.

Thats all I have for now.
[LG V20 Guides, News, & Discussion] Rafeh:
Thanks it's working on my g5 H830.
[LG V20 Guides, News, & Discussion] Nano23:
Hi. Where can i do that changes? With kernel aidutor? I cant find where i can do that. Thanks in advance
[LG V20 Guides, News, & Discussion] Nightshadow931:
If your kernel supports it, you'll have 'Screen' section in kernel adiutor app..
[LG V20 Guides, News, & Discussion] Nano23:
Where can i find hue? Can someone share a printscreen? My language is portuguese and its better if someone share a printscreen. Thanks
[LG V20 Guides, News, & Discussion] maxi65:
Hi

If your kernel supports KCAL then simply install Color control apk for more simplified setup :)
[LG V20 Guides, News, & Discussion] Nano23:
Thanks. It worked like a charm.
[LG V20 Guides, News, & Discussion] maxi65:
You're welcome
[LG V20 Guides, News, & Discussion] arvind.d:
I have a pretty bad retention problem, and I can't thank you enough for that tip. I don't have any retention problem anymore, gone! Am amazed and I have no clue why it works, and I'm good with tech!
[LG V20 Guides, News, & Discussion] justtryingtohelpyo:
I was able to remove mine without root with the Lux auto brightness app. Under advanced settings I changed the default display color values to 240 and it seems to have worked. Worth a shot since it doesn't require root or taking your phone apart :)
[LG V20 Guides, News, & Discussion] r33tom:
thanks! works really well no more screen retention and no root required!

---------- Post added at 03:42 AM ---------- Previous post was at 03:37 AM ----------

tried this but it didn't work for my phone, the sfilter app set to 10% works a treat though
[LG V20 Guides, News, & Discussion] nickthaskater:
Used OP settings (saturation at 50) in EX Kernel Manager with mk2000 kernel and retention seems to be totally eliminated.

I was skeptical, but so far it's holding out in places and scenarios I readily noticed it before.

Thanks, OP.
[LG V20 Guides, News, & Discussion] jetracer:
Works 100% thanks! This reminds of me of the old plasma days when they would burn in serious, but they sold dvds with the disco lights to fix it which never worked. I never messed with kcal much because i didnt truy understand what it did. I always just turned on comfort view (which didnt help the burn in) and was done but this is much better.
[LG V20 Guides, News, & Discussion] kaluna00:
Is there a link to the correct APK?
[LG V20 Guides, News, & Discussion] nickthaskater:
What APK?
[LG V20 Guides, News, & Discussion] kaluna00:
It Looked like there was some APK that was necessary to change those color settings. Is that not the case?
[LG V20 Guides, News, & Discussion] nickthaskater:
You need a KCAL enabled kernel and a kernel management app like Kernel Aduitor or EX Kernel Manager.
[LG V20 Guides, News, & Discussion] kaluna00:
Okay. Thanks for the information. I'll check if WETA kernel supports KCAL
[LG V20 Guides, News, & Discussion] maxi65:
Application name is color control apk.

Any kernel management app like ex kernal manager or Kernal auditor also supports the color management :)
[LG V20 Guides, News, & Discussion] kaluna00:
Thanks. I ended up using kernel auditor. Never had any issues but maybe this will stop any from developing. Thanks for the help
[LG V20 Guides, News, & Discussion] gregrock:
I would really appreciate someone please explaining in laymans terms, step by step, what exactly I need to do to fix my v20's image retention by rooting? You guys have me completely lost at "kernals" and what not. Ive read this entire thread and im still lost. My phone is not currently rooted but im prepared to do it if it'll fix this. Thankyou.
[LG V20 Guides, News, & Discussion] MysteriousAnon:
Root is basically a way of getting administrator access to your phone, allowing you to get access to features that are usually not accessible, such as setting how fast your processor runs, how your screen is calibrated, to even installing another ROM (sort of like an operating system) altogether. Rooting is usually done by taking advantage of an exploit (most Android manufacturers don't want you to root).

First, check what model of your phone that you have. Then, on XDA, search up your model and find out if it is rootable, and follow the steps. Double check your software version as some updates prevent the device from being rooted. If you root using the wrong method, you may end up with a paperweight with a removable battery and a quad DAC, so make sure it's correct the first time around.

If you don't want to root, have you considered the other app mentioned in the thread? that app doesn't require root but seems to get the job done, and it's a LOT safer
[LG V20 Guides, News, & Discussion] phamanhvu01:
You are the man.

Anyway, I guess quite a bit of thermal pastes will get the job done. As long as it doesn't damage other components that is.
[LG V20 Guides, News, & Discussion] Aroy48:
LG V20 image retention

Try using "nighty" app. Download it from Google play store. It will reduce the effect almost 99% . Trust me. I'm using it. Earlier I rooted my device and used customer karnal and then a app "colour control". The result was awesome and issue fixed by 100% but every time when I boot my phone, a critical error comes as your phone is not trust and will power off... something. I didn't like it and got back to stock

I googled a lot and finally I got this very light app "nighty"

Top and bottom part will be unchanged.
[LG V20 Guides, News, & Discussion] darkknight200:
The trophy of a rooted v20 is the warning page everytime you boot up. If it's normal rooted phone, it should go straight to lg logo and then start up each time.
[LG V20 Guides, News, & Discussion] Skylined:
Worked on my H910, thanks
[LG V20 Guides, News, & Discussion] maxi65:
My rooted fone also show the Warning Screen but I don't shut down. It simply goes further than this warning screen and Boots up.. Man! Its normal to have a warning screen on a Rooted LG V20 but if your device shutdowns then its not normal. There might be something wrong with your fone :)
[LG V20 Guides, News, & Discussion] spocko:
For people without root, some have mentioned using the sFilter app. The sFilter "Lite" app also does the trick. It's a little smaller than the full version, and doesn't contain any ads.

https://play.google.com/store/apps/details?id=com.sisomobile.android.brightness_lite

Set the Filter Opacity setting to 10%, and the color to black.

Then the final trick is to hide the constant notification on the notification bar and in the shade. Just go into the system app manager and disable notifications for the sFilter Lite app. After doing so, the app will run silently in the background doing it's job.

--------------------------------------

Edit:

I discovered that sFilter, and many other screen overlay apps, will interfere with certain functions. For example, you can't install sideloaded apps, can't post or change settings in the Facebook app, etc.

A solution is to use the Night Screen app as was mentioned in this post earlier in the thread.

https://xdaforums.com/showpost.php?p=74419168&postcount=34

It must be set to "Overlay System Mode". If you leave it in "Normal Mode", then you will see the same problems as with sFilter. Setting the top slider just slightly less than all the way to the right seems to be sufficient to avoid screen retention.

--------------------------------------

Edit 2 (Aug 13, 2018):

The Facebook app no longer seems to be affected by screen overlays. I've gone back to sFilter because Night Screen turns off every time the phone is rebooted.
[LG V20 Guides, News, & Discussion] maxi65:
Well the benefit of using kcal settings on a Rooted phone is not just to get rid of ghosting but also it increases the color production and vibrancy of Screen :)
[LG V20 Guides, News, & Discussion] IronJacob:
Custom kernel with kcal solved the problem, thank you!
[LG V20 Guides, News, & Discussion] :
The screen retention was driving me NUTS! I tried the KCAL values from this thread for the past few hours and I don't see any more screen retention. Thank you so much for sharing! :victory:
[LG V20 Guides, News, & Discussion] Americancosworth:
Just gonna say that this worked perfectly. I also noticed though that "comfort view" might induce and/or contribute to screen burn...
[LG V20 Guides, News, & Discussion] Unsolved_Mistry:
Anyone here got Oreo / a south Korean device? Is the screen burn gone? If 8.0 doesn't fix I'll finally do kcal, going to milk the lifespan out if this phone till the Snapdragon 855 devices come out for that 7nm goodness ?
[LG V20 Guides, News, & Discussion] :
I'm sure screen retention will be the same on Stock Oreo without kcal.
[LG V20 Guides, News, & Discussion] xCasasx:
My savior on late 2018 <3
[LG V20 Guides, News, & Discussion] nrmav:
Oreo 8. 0 did my v20
[LG V20 Guides, News, & Discussion] ciumurel:
Hello, my name is John, I live in Romania. I use lg v20 korean vers. F800l, Oreo 20c, updated through Lg bridge, stock, no root. Screen retention is not fixed, comfort view just has more adjusting steps, but does not fix retention. I have to use a free apk, SFilter, which works actually(at 10%), my screen retention is quite severe without it. It is really shamfull a company like LG, can't fix something that a free apk does. I've used G3, G4 and now V20 and am really dissapointed by this company, had problems with all these phones. They have great ideas, implemented very bad, only thing going for them is camera (which seems enough for me?). I use this korean version, because the global h990ds motherboard I had before, malfunction on the radio part and korean was cheaper. Lot of bloatware on this version U+(and illogic things like hidden menu to change gsm to wcdma) unfortunately, a little more even, on Oreo. Battery hold a little less and the phone gets warm faster on Oreo. Settings interface is completly different and icons shape/function, the same browser is slower on Oreo...

Have a nice day
[LG V20 Guides, News, & Discussion] TitoXx:
Warning screen is normal, it's because of the unlocked bootloader.
[LG V20 Guides, News, & Discussion] KUSOsan:
[MENTION=6282117]maxi65[/MENTION]

Thanks for the post. Unfortunately I still get minor retention mainly just along each side of the screen. I've tried modifying your values a bit and I've tried the custom presets that everyone else said got rid of it but none of them ever did. Your settings come the closest. Before I moved to a kernel with K-cal I always read people saying the blue is too high and that's what causes it mainly so if anyone else has anyone else has any suggestions to try I'd appreciate it
[LG V20 Guides, News, & Discussion] maxi65:
Well you should reduce the contrast value,it'll definitely fix the remaining retention Hopefully :)
[LG V20 Guides, News, & Discussion] tech_infinity:
I tried this out. Works really well! Thanks
[LG V20 Guides, News, & Discussion] maxi65:
Good to know that it worked for you :)
[LG V20 Guides, News, & Discussion] maxi65:
One further improvement is that if you use comfort view from display settings and set it to low, it makes the display even look better And If I'm not wrong SomeTimes i feel my phone has amoled display lolx
[LG V20 Guides, News, & Discussion] karkand:
Hello,

Can I just leave the screen on while doing this or I need to really use the screen?

Please advise.

Thank you.
[LG V20 Guides, News, & Discussion] KUSOsan:
I think you misunderstood. This isn't one of those burn in wiper fixes that flash the solid colors all over the screen. This is to modify specific color and picture values for the display kind of like on a TV where you can adjust contrast and RGB settings and whatnot.

So to answer your question it doesn't matter if you have screen on or off. Although you're only going to notice it with screen on.
[LG V20 Guides, News, & Discussion] karkand:
Ok, so we need to run those values at all time right?

Because I have tried this things twice and notice the change while using that only, when coming back to default, the burn in just come back again. Lol.
[LG V20 Guides, News, & Discussion] KUSOsan:
What do you mean when coming back to default? Are you using kernel adjuitor? That should be applying the settings every time at boot. Check to make sure. Depending on what version of the kernel adjuitor you are using it might be like in the picture or it might be hidden behind one of these 3 dot menus
[LG V20 Guides, News, & Discussion] karkand:
I mean that when there is no burn in on screen, I reset those values to the default one. I am using EX Kernel Manager, was bought it when using kenzo which was running EX Kernel by flar2. The apply on boot is available as well. So from your statement that we need to use those configured color values by all the time. Ok then if that so.
[LG V20 Guides, News, & Discussion] KUSOsan:
Oh gotcha yeah. These values are to be used all the time. You can't switch back to stock or default otherwise the burn in will eventually come back

If you don't like how the values look on the screen you can try tweaking some of the values a bit to see if you can get it to look better and if the burn in comes back just slowly put the values back till it goes away
[LG V20 Guides, News, & Discussion] jthomas1987:
Anyone know if this is still an issue with the Oreo update?

Just asking as I got the notification from Verizon a couple days ago that Oreo was available for download.

Currently I am on Alpha/Omega 4.0, while Oreo sound's nice for the improvements, I don't want to give up root and I don't want this screen ghosting problem again with a "stock" ROM if it isn't fixed.
[LG V20 Guides, News, & Discussion] Parasol_Monsters:
It was not fixed with the Oreo update, on all the posts I saw on xda/Reddit.

I haven't seen a provider put in a fix of its own either.
[LG V20 Guides, News, & Discussion] jthomas1987:
Well, guess I wait till Oreo hits the dev tree.

Oh well, Alpha 4.0 runs great on my phone with a Nougat base, and I figure an Oreo version will be even better.
[LG V20 Guides, News, & Discussion] maxi65:
You've to use these settings all the time to get rid of burn in.
[LG V20 Guides, News, & Discussion] MidtownHD:
thx for sharing.
[LG V20 Guides, News, & Discussion] scorpio76r:
This is working on the H918 rooted Oreo as well.
[LG V20 Guides, News, & Discussion] maxi65:
ThankYou very much to report here :)
[LG V20 Guides, News, & Discussion] scorpio76r:
No problem ?
[LG V20 Guides, News, & Discussion] Libraplum:
Hello guys I'm currently running on the Alpha rom (1.0.8)and, I must say it's running smooth like butter with the OP settings in the saturation set at 65.
[LG V20 Guides, News, & Discussion] maxi65:
Saturation settings at 65 will make the display over saturated and i think you might have noticed that the human skin tone and color is badly affected.
[LG V20 Guides, News, & Discussion] Libraplum:
Hello, do you think it's device specific because I have the h918 and, it's working well for me.
[LG V20 Guides, News, & Discussion] KUSOsan:
I think it's more of just a matter of opinion. Just like how some people like how OLED screens look and some like IPS better.
[LG V20 Guides, News, & Discussion] maxi65:
Yes May be..
[LG V20 Guides, News, & Discussion] gandyprakoso:
asalamualaikuum akhi..

im using F800L, stock nougat rom rooted.. so wheres the kernel that i must download?

syukron..
[LG V20 Guides, News, & Discussion] scorpio76r:
Just trying to help. Maybe you can try to in the Mk2000 kernel. Have you tried that kernel. Gamma kernel is a option to. I personally ran the Mk2000 kernel from nougat to Oreo
[LG V20 Guides, News, & Discussion] gandyprakoso:
well ok then..

backing up device in progress..

thank for reply m8
[LG V20 Guides, News, & Discussion] gandyprakoso:
already flashed m2000 kernel, then set color just like in 1st page using kernel editor, and work like charm.. thanks once again m8..

cheers.. ?
[LG V20 Guides, News, & Discussion] scorpio76r:
Glad to hear that.
[LG V20 Guides, News, & Discussion] sniper9911:
just tried it on oreo with my h990ds ... ghosting still there i tried saturation from 50 to 65 same issue

white text appears on the top green bar in the kernel auditor app

not working
[LG V20 Guides, News, & Discussion] H990DS_AMA:
Try this values. Works on Oreo H990DS

Red: 230

Green: 232

Blue: 255

Min RGB Value: 35

Sat Intensity: 49

Screen Hue: 0

Screen Value: 127

Screen Contrast: 127
[LG V20 Guides, News, & Discussion] X-Nemesis:
Is there root for the H918 on Oreo yet so this method can be used?
[LG V20 Guides, News, & Discussion] scorpio76r:
I see that you took the update before rooting on 7.0, anyways here is the best thread to post that question or find a direct answer https://xdaforums.com/v20/how-to/root-lafsploit-h918-version-t3773443
[LG V20 Guides, News, & Discussion] deathbytalkshow:
OMG thanks everyone for posting everything you know so far. Being a girl just by looking at me you'd think I'm only about makeup and high heels lol but it's been so long since I've rooted a phone. I bricked my first G2 years ago immediately after only 2 weeks of having it and I returned it to TMobile just like that and they didn't even say anything :angel: . Now I have to figure out how to root my V20 H910 and with what specific rom before going any further.
[LG V20 Guides, News, & Discussion] scorpio76r:
The Alpha Oreo rom by I95swervin is the most stable rom for use as a daily driver if you are interested.
[LG V20 Guides, News, & Discussion] SJMarty:
So I have been battling the retention issue for a while now. I can't seem to find KCAL settings that eliminate it any longer.

My question is...how much time should I get from a complete screen replacement before the retention issue starts?