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Colorbanding defeated

Danishblunt
Hall of Fame I
So as of today the 21.03.2021 color banding has been defeated. Now at the beginning I was under the impression that the crappy color banding was caused by pixelworks and guess what?
It wasn't.
Infact the reason this happened was actually because of ASUS not wanting to implement any type of gamma correction at all, while other manufacturers like nubia and oneplus have infact added gamma correction in their kernels. So today I simply stole some code from Oneplus 8 kernel like the naughty naughty boy I am and magic has happened. So what are the results of this?





Now as you can see the difference is absolutely insane. Blacks have returned, no pixelation and the screen looks absolutely georgous! Honestly this screen after calibration seems absolutely amazing, ASUS was not lying when they said that these panels are actually high quality. Granted the quality of the screen cannot be seen in those pictures very well as smartphone cameras have great difficulty catching stuff in the dark with huge amount of details. I took a closer shot as well to show that even the black crush is quite in check as well:

How exacly an absolutely new guy like me who has extremely little experience with kernel development could fix an issue i looked at in weeks while the experienced asus team didn't get the solution until this date is beyond me right now. I hope that the devs will fix it very soon now that they know they can simply nab code from nubia or oneplus and some modifications, today my SSD died with my ubuntu and kernel sourcecode on it, so only thing I have left is a flashable zip file that would most likely crash on 75% of rog3 devices due to extreme amount of undervolt, i will still share to those who want to try, but successrate won't be high :'D
At this point I want to thank Freak07 for introducing and helping me to get into kernel development much faster than I would have taken by myself.
92 REPLIES 92

Danishblunt
Hall of Fame I
badvlad03

@Danishblunt, I want to try it bro. Can you post the tutorial how to do it? Thank you.


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It's a custom kernel, it will void warranty and you need an unlocked device, also it needs to be snapdragon 865+ or it more than likely won't boot due to the heavy undervolt which I believe only a cherrypicked SD 865+ can run altho I haven't tested yet.

skaliajam8
Star II
Please please please🙏🙏🙏
Asus,
Fixed black crush issue?

jin_akira
Rising Star I
Apologies for my lack of knowledge on this but may i know if you can still receive FOTA updates with an unlocked bootloader and with a custom kernel in place?

swagarotb
Star I
Danishblunt

https://zentalk.asus.com/en/discussion/comment/158862#Comment_158862

Install his tweak and you'll realize that it doesnt fix banding at all, infact it makes it even worse. It's an experiment on his part, no need to credit anyone for that, all it does is make the phone better for low brightness visibility. He's giving me ideas, I'm giving him ideas, nothing more to it. It's important to note the solution I have is not public, nobody can copy my code, there exist no github reopsitory or anything of the sort, it died with my SSD and only I have this particular solution as of today or maybe some private kernel developers have developt this "op8 / nubia" fix in their kernel.

@botboy444 As mentioned previously, no need to credit anyone about giving others ideas for experiments, otherwise Freak07 credits list would probably be as long as a book.


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will you make a public version of the fix?, or share it with Freak07 so he can maybe use it in his kernel?

jaykesharwani9
Rising Star II
Orginal poster, 100 marks for your curiosity and effort.
A simple kernel tweak fixed this issue damn.
This simply implies that Asus Devs weren't resolving this issue on purpose. And They were focusing on Rog phone 5.
Now it is clear that Asus has duped everyone with Rog phone 3.
This is a clear case of cheating.
I will officially log a complaint against Asus India for duping us.