yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] Mr.Gong:
After using <jahlex kernel v0.2d>, feel the electricity consumption is speeding up , maybe power consumption can be optimized again.

Power consumption is twenty percent per hour for playing games :eek:
[LG V20 Guides, News, & Discussion] phamdungtc:
Thanks bro, i have just root my phone H990N. Plz tell me, any cook rom for H990N. Thanks!
[LG V20 Guides, News, & Discussion] jody2k:
Yes its good but i feel there is indeed more room for battery optimalisations i noticed too. Try greenify app btw

I guess its not so easy to compile modules on the tweaked kernel its gona need some time to implement
[LG V20 Guides, News, & Discussion] jeanclaudevandamme:
For someone who wants to buy a new V20 and root it. Would you recommend that they now buy a H990N / H990DS in their home country or pay extra import tax for a US996?
[LG V20 Guides, News, & Discussion] Moon75:
I have some experienced I think buy in the country is better if need fix or anything its will be easier. I got H990ds in my country this model is the one the shop sell no other model. If you know how to root it the performance is better with custom/tweak kernel for stock rom. But for rom for dual sim model I have not seen one yet, it got a bad dev support the v20 I think.

Lucky enough we can root it thank you to the efforts of the devs here.
[LG V20 Guides, News, & Discussion] dave_id:
hello

I have successfuly rooted it (and fixed the camera issue)

what if I want to get back to stock? does a kdz flashing with lgup work or do I have to exactly follow the procedure on post #1?

thanks a lot .
[LG V20 Guides, News, & Discussion] mustasusi:
H990 Single SIM here.

I just rooted my device with flying colors. Huge thanks to devs and contributors for the awesome work and efforts, for bringing new life to this model - Much appreciated :highfive:

Only downside is double boot up time as well as register to a network on every boot or coming back from "airplane mode". Apparently The kernel provided has somewhat tricked the software into thinking it's a dual SIM since the menus feature dual SIM options too.View attachment 4276428

Apart from that calls and 3G work fine (don't have 4G in my area so can't be sure about that). Now happily enjoying the long time favorable vibes of Viper again.View attachment 4276429

I could have managed without root by now, almost got over Viper with EQ Ultra which sounds quite good, when retention kicked in all of a sudden. That was the last straw for me. Then it was time to search for a custom kernel with Kcal support. Reading through development section just to find Werewolf the most recent for the American variants, except this name sounded familiar which reminded me the one I downloaded off this very thread and even already flashed, hoping it'll fix some camera issues. I thought it'd be worth to try Kernel Auditor and to my most amazement it's been utilized, so bye bye retention\ghost image for good.

Last thing I wonder - can I prevent this message from showing up on every boot?

View attachment 4276430
[LG V20 Guides, News, & Discussion] jahlex:
Hi guys.

Here is werewolf stock kernel by [MENTION=5184450]USA-RedDragon[/MENTION] modified for LG-H990 with :

- root as implemented by [MENTION=6984210]emdroidle[/MENTION]

- camera drivers from latest official LG-H918 sources

Let me know how it goes. Cheers.
[LG V20 Guides, News, & Discussion] exadeci:
Camera Focus: Working

Video Recording: Not Working
[LG V20 Guides, News, & Discussion] Redline:
The difference between this and [MENTION=6984210]emdroidle[/MENTION] 's v0.2?
[LG V20 Guides, News, & Discussion] dave_id:
these features+camera drivers
[LG V20 Guides, News, & Discussion] chrismin13:
Even though I don't own a V20, this is certainly exciting news. Does this actually unlock the bootloader, l or is it like Bump and Loki where it's just a workaround to make the phone boot custom software without having to unlock it?

I saw that many other people requested an unlock for their devices, and I'll request one for the LG G2. It's a great community that would benefit greatly from a true unlock.

Thank you for all your hard work!
[LG V20 Guides, News, & Discussion] kingnose:
Does anyone's screen freeze then turn black after root? It happens randomly and the only way to get out of the black screen (second screen is still on, but not moving) is by taking the battery out.

Anyone have a fix?

EDIT: Seems to be more stable after many reboots and all the initial apps finishing updating.

EDIT2: Phone keeps not responding (primary display black, secondary screen working) Power button doesn't do anything. I was playing music when this happened, I can control the music from second display, but primary display does not work until after a few minutes.
[LG V20 Guides, News, & Discussion] jd.21:
[MENTION=6984210]emdroidle[/MENTION], great work:good:... does this method work with V10(h962 or h961) dual sim variants?.
[LG V20 Guides, News, & Discussion] Hamodi:
now i have this screen too !!

it says kernel crash !!
[LG V20 Guides, News, & Discussion] kingnose:
Try flashing twrp again; it solved it for me
[LG V20 Guides, News, & Discussion] Hamodi:
i have it when i tried to boot up not to go to recovery !

recovery is still there tho and i can get into it

this happen with you when you tried to get into recovery or bootup ?
[LG V20 Guides, News, & Discussion] kingnose:
So you can go into TWRP menu right?

Then I think you need to see if you have the correct kernel in your sd card, and when you do (assuming you have a backup of everything on your PC)

Wipe -> Format Data

Go back to main menu

Install -> Add h990*-kernel.zip (the one that corresponds to your model) and add SuperSU.zip to the queue and install.

After that, tap reboot
[LG V20 Guides, News, & Discussion] Hamodi:
i'v done this , but still get the same message , tried the 3 kernel too but always get the same message .

before i wipped the data , i can hear the screen unlock sound and button press , but the screen is stay stuck on lg logo tho :eek:

its confusing

what kdz you are on ??

maybe i will try to flash it on my phone and root it

[MENTION=6984210]emdroidle[/MENTION] any ideas bro ??

Im out of luck so far even tho all steps where successful flashed

[MENTION=4591212]me2151[/MENTION] maybe you can help bro ??
[LG V20 Guides, News, & Discussion] kingnose:
I'm on the Taiwanese v10c
[LG V20 Guides, News, & Discussion] ExtentedByte:
Hello guys,

I'm new to lg software and wanted to ask:

1. After my root process went succesfully, my cpu usage stays between 96 - 100%. Do you have the same problem, or is it just me?

2. If I flash a newer KDZ file for example 10e over the 10c without flashing the abootbackup.img before, will it remove twrp or won't LGUP touch the recovery?

Or will I even end up to a hard bricked device?

With best regards

Edit: as for full stock, before rooting, I had also terrible battery life.

Retourned to full stock, checked with EX Kernel Manager, Cores still persist to be on full load.. seems to be a hardware defect, instead of a software as the Core problem still persist on any Roms LG provides
[LG V20 Guides, News, & Discussion] kingnose:
MagiskSU is confirmed to work (SafetyNet Passed!) (H990DS)

Just replaced SuperSU.zip with MagiskSU.zip in instructions. The Magisk zip can be found here: https://xdaforums.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445

In Magisk Manager (You will need to install apk from somewhere else, I lost the link), follow these steps: https://www.reddit.com/r/Magisk/comments/6h30wl/help_safetynet_failed/ (if safetynet doesn't pass)

EDIT1: Root with MagiskSU seems much more stable as well for some reason.
[LG V20 Guides, News, & Discussion] Madbullben:
Hello. I'm wondering if rooting my phone may fix the problems it's having. I currently can't connect to the 5GHz WI-FI at all even though I know the router is perfectly fine with all my other devices. Should I risk it and root it, or should I just send it back to the sellers. This is currently my 2nd V20 as the first one also had the same problem and I sent that out to be replaced.
[LG V20 Guides, News, & Discussion] faeterov:
Two times the same problem? That's enought to disregard having a bad phone.

In my experience sometimes this problems are related to the type of password/security that you are using. Did yo try removing any security?
[LG V20 Guides, News, & Discussion] Madbullben:
Yes I did unfortunately. I removed all security on one router changed the channels everything I could think of. I tried to connect to my other router still nothing. I used a wifi Analyzer to see if any routers in my area that have 5ghz would work, still nothing even though my PC is right next to it and picks up 4 to 5.

I updated the phone to see if that's it, nothing still. Sent that one back to the seller and brought another one from the same people and got the exact same problem.

The phone did manage to see a few channels on my router which was quite high up on the channel listings but my computer and other devices couldn't connect properly or didn't have internet etc.

It may just have been the batch that got sent to the seller or something else I'm not too sure. I have also seen another user saying the same thing as well

I'll make another thread about this so I don't make this thread off tangent.

Thanks Ben
[LG V20 Guides, News, & Discussion] me2151:
Usually caused by a incompatible kernel.
[LG V20 Guides, News, & Discussion] emdroidle:
Are you two on the single-SIM H990? If so, then the conclusion is pretty simple, turns out the H990 has larger differences from the H990DS than had been hoped. I had hopes the differences were that small, but this suggests otherwise. In which case that means now there is a tough game of us trying to figure out the differences remotely. Alas, this means a tough guessing game for me. :(
[LG V20 Guides, News, & Discussion] Sparksys:
Is there a chance for this to work on other devices? Motorola for example
[LG V20 Guides, News, & Discussion] ahlok_hk:
Have been using the rooted H990DS v10a-TWN for a few days.

There is no problem if use as individual device or using a OTG device. But it hanged and show green kernel error around 30% of time when the v20 is connected to a USB hub with Ethernet Port and a slimport hub (hdmi worked fine however).

Those USB peripherals all worked fine before root.

[MENTION=6984210]emdroidle[/MENTION] is there anything still missing in the kernel?
[LG V20 Guides, News, & Discussion] marvelboy88:
Confirming that kernel of h990ds working on h990n also getting error when try to flash magisk instead of supersu...h990n kernel make kernel crash..
[LG V20 Guides, News, & Discussion] Hamodi:
I'm on single sim h990.

Donnno if there anyone that had it work with H990
[LG V20 Guides, News, & Discussion] Redline:
Would be good if we could get those features added to Em's 0.2 kernel, only problem I see here is that this one is less up to date, and may not include fixes such as the aforementioned WiFi/BT ones.
[LG V20 Guides, News, & Discussion] JackDownAHill:
I've got my new H990DS sitting at the post office waiting for me to pick it up.

Which kernal should I flash? jahlex's version of emdroidle or werewolf?

Also is there a particular reason that the international version didn't get an official unlocked bootloader, other than FU?
[LG V20 Guides, News, & Discussion] exadeci:
[MENTION=6984210]emdroidle[/MENTION] Something that I should have pointed is that my camera focus has always worked so don't have one of the devices with this issue.

To me everything behaved the same as your first kernel so I've switched to jahlex kernel as I need video.

You can't flash werewolf directly as it's not meant to be for our model, emdroidle's version is great but some features are missing so go for one of jahlex's kernels (he did 2 one based on em and the other on ww)

As for the bootloader LG unlocked some to say that they are developers friendly and they probably decided that it was not worth the money to do it on more models.
[LG V20 Guides, News, & Discussion] ahmedyar91:
Depending on the version you have

Starting of with the Root process and you should flash emdriodle's kernel (attached in OP), if everything goes well you can flash Werewolf's by Leicxan for some extra features which you may like,

If you have any focus issues ,which you might face because you're getting a new Device, you should flash Jahlex version of emdriodle which is currently 0.2d. Werewolf's version by Jahlex has some extra features.
[LG V20 Guides, News, & Discussion] ahmedyar91:
Been using it for some hours

Overall it is looks good

The power option is back while charging

KCAL settings are working

Facing a little lag while charging may due to fast charging, though never faced this issue in previous or in stock kernel
[LG V20 Guides, News, & Discussion] dadme:
Just check this https://www.xda-developers.com/lg-root-checker-tool-slow-performance/
[LG V20 Guides, News, & Discussion] ahmedyar91:
Thanks but i never had lagging issues withprevious kernels while charging . only happening with new modofied werewofl's kernel by jahlex
[LG V20 Guides, News, & Discussion] jody2k:
[MENTION=1657835]jahlex[/MENTION] thanks for your new kernel everything is working fine :) and great features now too ! You are the best
[LG V20 Guides, News, & Discussion] admops:
Just curious.. what is kcal? how do you test if its working?
[LG V20 Guides, News, & Discussion] JackDownAHill:
[MENTION=2764901]exadeci[/MENTION] [MENTION=3980243]ahmedyar91[/MENTION]

Thanks. I seemed to get every error that's popped up in this thread, but I've managed to get it to work.
[LG V20 Guides, News, & Discussion] mustasusi:
I actually kinda like the idea to have a SIM on/off toggle without switching to airplane mode that prevents FM radio operation, allowing me to listen to the radio without unexpected interruptions of incoming calls (unless you can tweak fmservice accordingly).

Now as for the file you attached - do I need to flash it normally on TWRP as I do with any typical .zip?
[LG V20 Guides, News, & Discussion] doctor_james:
Have you tried that script yet on a h990ds? I did quickly but it produces a boot.img that's half the size of the original, and after flashing the boot process fails with a kind of kernel panic. Flashing back the original image works fine.

EDIT: Just manually commented the service using this method and was successful: http://k.japko.eu/boot-img-manipulation.html
[LG V20 Guides, News, & Discussion] D4rk9009:
Can someone please tell me one thing.. After u root h990.. What ROM can I use???? I didn't see one yet...
[LG V20 Guides, News, & Discussion] Razorbacktrack5535:
Thanks for your report. Could you write a small tutorial? Thanks
[LG V20 Guides, News, & Discussion] doctor_james:
Sure.

First, it helps if I paste the whole URL properly :silly: (it has a html extension) http://k.japko.eu/boot-img-manipulation.html

I used adb and abootimg on linux. (abootimg is available on Debian via apt-get abootimg).

Follow the instructions from the linked page until you get to "Then edit the files you want, most probably default.prop." Note: you appear to need to be root (sudo) to unpack and repack the ramdisk due to permissions on the .backup directory.

Ignore default.prop, but instead edit init.lge.rc and comment out the service we're blocking:

# LG RCT(Rooting Check Tool)
#service rctd /sbin/rctd
# class late_start
# user root
# group root
# seclabel u:r:rctd:s0

Then just continue with the instructions to create a new image (ignore updating the old image).

Upload the newly created image to the sdcard and flash in TWRP.
[LG V20 Guides, News, & Discussion] Razorbacktrack5535:
I got a nice bootloop ahahah. I had to restore the original boot.img
[LG V20 Guides, News, & Discussion] jeanclaudevandamme:
i don't have time to read 80 pages.

why is everyone flashing different kernels and mentioning jahlex / werewolf?

what is wrong with the instruction and links in the very first post of this thread?

(In all the android phones I've had, I've only ever rooted according to the basic instructions and they've all worked)
[LG V20 Guides, News, & Discussion] ExtentedByte:
Thank you for your guide!

Did you see some UI improvements after removing the rctd?
[LG V20 Guides, News, & Discussion] v0ne:
Is this ok? Am i affected with rctd? Guess the problem with rctd is for T-mobile variants only.
[LG V20 Guides, News, & Discussion] Razorbacktrack5535:
Yes it is active
[LG V20 Guides, News, & Discussion] v0ne:
Oh. Will try the earlier procedure. Thanks
[LG V20 Guides, News, & Discussion] Leicxan:
Just did a simple patch to the emdroidle's latest experment2 kernel, so we can get rid of rctd service (aka Rooting Check Tool).

Method is quit simple, I modified the init.lge.rc in the ramdisk part, cuz we use anykernel2 method to install the kerenl, it's very easy to change that init.lge.rc file.

This rctd service is in ramdisk part, so nothing to do with the kernel, link is my modified zip file, everything is as same as emdroidle's stock one, get it here

File MD5:C2D39654D10FDD13C17257D29DDD5D4A

SHA-1:B0CF6DB7B972D80184946ADEAB47E77CD541D3B3
[MENTION=6984210]emdroidle[/MENTION]

You can add this in anykernel.sh

## AnyKernel permissions
# set permissions for included ramdisk files
chmod -R 755 $ramdisk
chmod 750 $ramdisk/init.lge.rc

Then put modified init.lge.rc file in ramdisk folder

# LG RCT(Rooting Check Tool)
#service rctd /sbin/rctd
#class late_start
#user root
#group root
#seclabel u:r:rctd:s0
[LG V20 Guides, News, & Discussion] dadme:
Leicxan, could you please modify your kernel werewolf_h990_unofficial_v0.1_l711.zip also, and upload new version. A lot of people are using your first version.
[LG V20 Guides, News, & Discussion] D4rk9009:
Omg am I missing somewhere something.... All o hear is damn kernel...OK cool... What god damn ROM can I flash on. H990????? All o see is other models listed under every rom

---------- Post added at 06:54 AM ---------- Previous post was at 06:49 AM ----------

I restped back with upeecut... Got no roptcnp tarp... Is my bootloader still unlock???? I just don't have computer right now... Why can't we just use terminal. On our phone.. Just type these simple fasyboot adb commands....
[LG V20 Guides, News, & Discussion] oliwek:
There is none yet. Maybe LineageOS will be flashable in the future. But if you want to enjoy the quad DAC now you have to stay stock I guess. The TWN rom is bloatfree, not bad.

Envoyé de mon LG-H990 en utilisant Tapatalk
[LG V20 Guides, News, & Discussion] D4rk9009:
Is there anyway to flash tarp with no PC? And whats --tw
[LG V20 Guides, News, & Discussion] Leicxan:
Done, I update the link that emdroidle mention in OP.
[LG V20 Guides, News, & Discussion] ahmedyar91:
[MENTION=1657835]jahlex[/MENTION] Can you update and add RCTD patch to your kernels

Thanks
[LG V20 Guides, News, & Discussion] Mr.Gong:
All the problems have been solved, this kernel is perfect. :D
[LG V20 Guides, News, & Discussion] ahmedyar91:
It's already Done Dear, Check previous post
[LG V20 Guides, News, & Discussion] dilaboni:
Thank you sir please show me witch post numbre. Im bad for english
[LG V20 Guides, News, & Discussion] ahmedyar91:
There you go https://xdaforums.com/showpost.php?p=73294716&postcount=391
[LG V20 Guides, News, & Discussion] dilaboni:
assalamou alaykoum

You are a great man thanks:good:
[LG V20 Guides, News, & Discussion] exadeci:
No changes, video recording still bugs
[LG V20 Guides, News, & Discussion] doctor_james:
Nothing of note, but I've never found the UI to have any issues anyway. I suspect people that do have issues are seeing CPU throttling to handle heat and I'm simply not doing anything that gets it that hot (such as playing 3D games).
[LG V20 Guides, News, & Discussion] MosesCT:
Can someone help me please?:crying:

My english is bad, I'm italian, so i need a step-by-step guide for almost everything...

1- i have april patch, so what i need to go back and how?

2- "unlock oem" in developer option need to be on or off?

Please help me, i can donate too if someone help me!
[LG V20 Guides, News, & Discussion] dave_id:
-Android security patch level; if your phone is on an update after December 31, use LGUP to "refurbish" to an earlier firmware release (this will do a factory reset)

you can find the roms here:

http://lg-firmwares.com/category/lg-series/lg-v20-dual/

http://lg-firmwares.com/category/lg-series/lg-v20/

uge LGUP:
[LG V20 Guides, News, & Discussion] MosesCT:
Thanks a lot!

Now I need to update from 10c to 10f but the instuctions aren't clear!

Second thing: no way to remove the red triangle on boot?
[LG V20 Guides, News, & Discussion] dave_id:
red triangle will stay.

it's kinda unclear but read it well, its pretty straighforward in fact

this post helped me:

https://xdaforums.com/showpost.php?p=73333482&postcount=26
[LG V20 Guides, News, & Discussion] MosesCT:
Some passage is unclear for me, I'm noob lol.

Where I must insert command?

Plug phone into pc and start cmd? And kdzwriter where need to be? in the phone?
[LG V20 Guides, News, & Discussion] Leicxan:
Got an error when useing h990-siminfo.gz

elsa:/sdcard # gzip -d h990-siminfo.gz
elsa:/sdcard # chmod 755 h990-siminfo
elsa:/sdcard # ./h990-siminfo -1 -o sim_info.dat
sh: ./h990-siminfo: can't execute: Permission denied

I'm already using root permission.
[LG V20 Guides, News, & Discussion] ahmedyar91:
Goto to adb folder

Copy kdz here

Open cmd from adb folder
[LG V20 Guides, News, & Discussion] lucfig:
Do any of the kernels for the 990ds have option to disable touch boost?

A very battery hungry decision to make the little cluster jump to 960 and the big to 1036 everytime the screen is being touched.

Enviado de meu LG-H990 usando Tapatalk
[LG V20 Guides, News, & Discussion] exadeci:
https://elementalx.org/the-truth-about-kernels-and-battery-life/

You'll save more battery by changing the governor and/or limiting the max frequency of cpu and gpu
[LG V20 Guides, News, & Discussion] ahmedyar91:
Can you share which governor and other settings/tweaks are you using. will be helpful for everyone
[LG V20 Guides, News, & Discussion] jody2k:
Using nightmare gouvernor and zen i/o scheduler
[LG V20 Guides, News, & Discussion] Redline:
With Zen my phone fails to get past the lockscreen without freezing up and rebooting. Any ideas?
[LG V20 Guides, News, & Discussion] jody2k:
Hmm not having this kind of issue with zen

What version of v20 youre having?
[LG V20 Guides, News, & Discussion] MosesCT:
Thanks, you saved my phone bro!

Guys, does the focus laser work? I don't see the red light inside like in the g3
[LG V20 Guides, News, & Discussion] fairyshacker:
I'm on H990DS (Security patch 1 July 2017)

Should i need to flash (H990ds10d_00_OPEN_AU_DS_OP_1216.kdz) (Security Patch 30 Dec 2016) before continue to root?
[LG V20 Guides, News, & Discussion] MosesCT:
Yes, you need a patch before 2017
[LG V20 Guides, News, & Discussion] Redline:
H990DS. Confirmed it's only an issue with zen, ended up having to restore from TWRP backup I did before flashing the new kernel.

Yes laser focus works. If you have the phone standing up and look at it using the camera on another phone, you can see the sensor flickering.
[LG V20 Guides, News, & Discussion] fairyshacker:
is there any way to use LGUP via mac?
[LG V20 Guides, News, & Discussion] eclipse6:
May I asked what's the reason you determine nightmare is the best for V20? I did some search and some websites suggested to use Ondemand for power efficiency.

I know for sure everyone has different opinion but wondering if you can share your source and investigation for me to take a look and understand as well

---------- Post added at 02:42 PM ---------- Previous post was at 02:38 PM ----------

It may be just my mindset thinking that without RTC it will be faster..... but definitely I can feel my device is snappier. Thanks a lot
[LG V20 Guides, News, & Discussion] MosesCT:
I don't kwon, sorry!

But check the official thread for more information