yashsingh1/xdaforums huggingface dataset:
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] mcsmart:
I was curious so I have flashed the latest Oreo modem FW and custom partition through kdzwriter. This was

not

a good idea, my V20 did not boot with this firmware any more. Recovery was also broken. It seems like no kernel could be loaded with the updated modem firmware, I got very strange errors instead right after the LG logo. I think this might be due to my development bootloader (flashed through Dirty Santa), which probably fails SoC initialization with Oreo modem FW. I was able to downgrade modem FW again through LGUP (partition DL).

What I have learned from this is: do not flash Oreo modem firmware on Dirty Santa devices!
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] cnjax:
I have oreo firmware on dirty santa bootloader with no issues using a custom stock based rom
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] mcsmart:
Are you sure you are talking about the modem firmware here and not just the ROM/Android version? How did you flash the Oreo modem firmware? Did you flash in kdzwriter along with the /cust partition from the latest stock KDZ?

Maybe it's just my phone that is a bit special here because it's cross-flashed from VS995 to US996. But from the error I got it really looked like a severe issue somewhere in the bootloader/SoC init/kernel chain. Since the recovery kernel is also affected it can't just be the ROM in my case.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] DaCHeF36:
Me too on a VS995... Went full Alpha Omega Oreo to 15.1 Lineage to this 16 ROM.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Vortell:
Modem file is not just modem on these phones. It has full bootstack. You can and I think there is flashable modem files but it messes up fingerprint. If I remember right. You would have to look for them.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] cnjax:
Didn't have to flash modem separately as the rom has full oreo firmware which includes modem
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] mcsmart:
Which ROM was it and how did you flash it? The various pre-rooted stock ROMs floating around in flashable zip files (such als Alpha Omega) do not contain the modem firmware.

I still think you are mixing something up. If you have not intentionally updated the modem FW through LGUP or kdzwriter it is very likely that you are still on the Nougat version (which is not a bad thing at all), even if you are using a stock-based Oreo ROM. What is your baseband version?

As Vortell mentioned it seems like the modem FW plays an important role in the boot stack so me thinks that it's probably not trivial to update it on Dirty Santa devices (which use an early development bootloader).
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] cnjax:
Your incorrect alpha installs the full firmware with the rom again full firmware includes modem files
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Vortell:
Cnjax is correct this includes full firmware including modem. Without full firmware fingerprint would never work. The Dev was trying to do partial updates but it caused him to have to try to explain it to much so he went back full firmware. Infact he made downgrade firmware package so people could try it and easily go back down to nougat. For lineage installs. It's in the guide section.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] warwagon19792:
I have 3 vs995's, 2 are running lineageOS 16 and the other one is stock LG. The 2 lineage OS phones are running the latest modem firmware before 20 (VS9951CA)

When putting the sim in the stock V20 phone and calling it, it rings once on the phone I'm calling on and the call comes through.

On the other 2 (Lineage 16) phones, it rings 4 times on the handset before it finally rings on the v20. I'm just wondering how or if I can fix that. Or what the best modem firmware to be on is.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] sends72:
i tried the 20200204 and it hanged on the animated logo of LOS. After about 5 min. it rebooted into twrp. My v20 is a h910. I tried everything, I just can not update from LOS 15 any ideas? Thanks
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Do a restore if you made a backup if you need to use the phone for the time being but can you try clean flashing LOS 16.0 and see if that boots at least?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pranciskus2:
Noticed that a person I'm talking to via messenger doesn't hear me on LOS 15.1 with flashed Gamma Kernel and other recommended things. Are messenger calls work on this, 17.1 or 14.1?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
I have 0 mic issues on 17.1. Try stock kernel.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pranciskus2:
How could I replace gamma kernel with stock kernel?

Do I have to flash KDZ and again dirty santa and twrp?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Vs995Child:
Just reflash 15.1 again. Dirty of course.....and it will replace kernel.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EMNM:
I just installed los 16 on my h918 everything's working except flashlight

it worked only after restarting phone and after installing magisk it completely stopped working

can someone please tell me how to fix it?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] darkknight200:
i did clean flash to los 16 initially from nougat firmware and camera and every sensor works like normal but youtube was showing blank screen and wouldn't load anything. I tried many methods from cache clearing to uninstalling to get youtube to work but all failed.

In the end, i had to clean flash los 15.1 and setup then dirty flash to los 16 and youtube works like normal loading up.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Why not go to LOS 17.1? We're having fun there! :p
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] warwagon19792:
If you call your phone, how many times does it ring on the phone you are calling on before your cellphone starts ringing?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] negitivesinx:
NFC not working

I flashed the latest 17.1 to my US996 (no DirtySanta) and as far as I can tell NFC isn't working. It says it's on but the App doesn't detect my tag. However the same app works perfect on my Nexus6p running RR. Can anyone else confirm this and if there's any fix?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
[MENTION=2881807]x86cpu[/MENTION], I'm trying to build this rom and I've used all your sources and it keeps failing on brunch. Should I be using the files from your github instead?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] KEED_FOUR:
Hello! I bought yesterday lg v20 vs995 I want to unlock the bootloader, well, when I go to the developer options there is no "Enable OEM unlock" button. Do not tell me what to do?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] mcsmart:
Does anybody know what happened to single-handed mode in the February build? It was working in the December build but disappeared in the February build on my device.

Gesendet von meinem LG-US996 mit Tapatalk
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] x86cpu:
Yes, I forgot to add it when building 16.0. That and 3-finger screenshot. Updated builds should have it, sorry about that.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pentium0:
3-finger screenshot!

Thank you!
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] x86cpu:
lineage-16.0-20200303-X86CPU

lineage-16.0-20200303-X86CPU

March security update. I also added back in the 3-finger screenshot, and the one-handed mode I accidentally dropped from the February build.

I also added in a way to disable the notch. This would put it back like Lineage 15.1 is.

Go to Settings > Developer Options > Simulate display with cutout > "Hide"
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] darkknight200:
very minor bug that I found is when playing videos on lowest speaker volume, there is alot of static sound but disappears when you raise the volume up.

No static when headphone is plugged in on all volume levels.

** update

flashed the tasha sound files and v15 gamma kernel.

static is gone on lower volume with speaker in video playing
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pranciskus2:
Can someone check if the mic on Messenger works? Because on 15.1 it doesn't.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pranciskus2:
Did someone notice sound crackles sometimes? I have never experienced them in 15.1. (Using with gamma kernel v15 and other recommended things)
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] darkknight200:
when i call my v20, it takes probably about 1 ring and then v20 starts ringing on the other end. No problems with calling and receiving.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] warwagon19792:
Damn, mine rings 4-5 times before my phone rings. But only on LIneage. Rings once on stock.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Hello there, been a while since i been here. So... since Android Pie is taking forever or just not coming, ive been wondering if i should go back to LineageOS, the issue being i dont know if the data issues from before are still present or if there is a work around (the issue being that i could not make or receive calls or texts). If anyone could fill me in on if thats still an issue or if thats fixed that would be great. Thank you for what your time as well
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] pranciskus2:
I have H990DS and contacts imported from .vcf file dissapears often. Is there any solution for this in this ROM? Or maybe in 17.1 this problem is solved?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Quick update: Even though i have done this before, it does not work anymore. I do not know why, but it just doesnt. I guess its back to stock for me and try some other time.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
What doesn't?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Im sorry if it isnt the place for this, but i didnt get far in flashing twrp with dirtysanta, tho for now im not going to worry about it.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Which model V20 do you have?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Verizon, VS995. Its worked before, in august 2019. Im not sure if a different dirtysanta method or not. Again, im not exactly worried about it right now, ill have to deal with it when i have time again for it
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
[/COLOR]

Did you use DIrtySanta during that attempt and was it successful?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Yes, Afaik DirtySanta is the only way to unlock the bootloader and root the v20. I feel that a different dirtysanta method was used before, but ill have to try that when i get to it again, likely spring break or another time
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Not exactly. I didn't need to DirtySanta to unlock my us996 which comes factory unlocked. I just had go on LG's site and get a file to unlock the bootloader and then push it over in fastboot and then push over TWRP as well.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Yea, Unlocked models have that. I am going to try this again using the other dirtysanta guide. I have 3 weeks of time right now so might as well try.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Good luck! Hopefully it all works out in the end! :) I've been doing my own builds each day and haven't run into any hiccups yet!
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
It didnt work sadly, for some reason its not booting me to twrp to root it, much less show its unlocked
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Are you able to fastboot into the phone?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Yes, i dont know what caused it to not work.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
So try pushing TWRP through fastboot and let us know how that goes.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Alright ill try that when i can. As for now I think i hit a boot loop? The verizon loading screen is just going and going after flashing the kdz again.

EDIT: factory data reset fixed it

EDIT 2: Should the bootloader say unlocked? if so, how do i do that, as it says locked for me. Trying to boot twrp via fastboot issues a unsigned or incomplete error, and i get the secure boot password on boot as well

EDIT 3: Hey look another edit, Im currently going through flashing stuff, Somehow twrp worked, and now im getting everything done in AO before i flash LineageOS. Hopefully my data and sms work, if it does, im keeping root

EDIT 4: Last edit. i got everything flashed, but there are times where lineage fails to flash but succeeds at others times? and boot is pretty long, No idea the cause, And as im typing it boot looped back to the red triangle and recovery. No idea whats going on
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
Long boot (10+ mins) can be normal on a fresh install. Are you installing GAPPS too? With my phone I get a yellow triangle complaining about the bootloader but then proceeds to boot.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
I get a red triangle complaining about the security fail. But when i tried i did the wiping, rom, gapps, kernel, magisk so on. even tried using 15.1 but that didnt work, Not sure why its not working now, but Im not to worried anymore as i can use Alpha omega. Its not Pie and maybe wont be, but its rooted at least so theres that
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] G U C C I:
So what happens if you do a clean flash with no GAPPS or Magisk?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EnterTHEvoiD:
Are you on about the red triangle when you first start the phone after having flashed the rom?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
I havent tried that, I may end up doing so whenever i decide to attempt flashing again

Yes, Afaik there are two that you can get, corrupted device that wont boot, and the security check failure that wont boot. But of course both boot anyway
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EnterTHEvoiD:
That is completely normal lol, let the phone run and lineage will eventually start.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
I have, with Lineage it always either boots back to TWRP or continues on till i take out the battery. Its mostly the TWRP one though, unsure why has i had it work perfectly before (outside the SMS issue)
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Electrolite_XYZ:
So I have the H990DS using Gamma kernel SS, install after a full wipe of everything, at first it boot normally but android setup crashed so I decided to reboot and the shut down issues started, like someone said removing my sim card from the slot 1 fixed my issue, I'll try to update if after installing the sim again and rebooting after the first setup will cause the issue again.

EDIT: Well what a shame as noted by others the H990DS shuts down after some time when I have a sim card, doesnt matter if it's inserted in slot 1 or 2. If I have no sim card at all it works fine. I hope we can have a fix, I love the seconds screen working fine in Lineage, such a gorgeous OS upgrading from Nougat
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] jl10101:
Thanks for this! Will be giving this a try later on. I wonder if it corrects the Bluetooth call issue too? That seems affected by the mic problem. It should also fix low volume / bad quality recordings in WhatsApp, as well as help with Hey Google hotword detection. Let's see!
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Migush:
It seems like the phone crashes if a simcard is inserted that'll connect to data service. Either select no default data simcard or disable mobile data I think.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] TripOG:
Yep I use an h910 which seems to be fairly problem free compared to other v20 variants
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] x86cpu:
lineage-16.0-20181214-X86CPU

lineage-16.0-20181214-X86CPU

Just an updated one. Maybe camera a little better. Still permissive mode. Fingerprint still fails. Bluetooth might be a little better on a data wipe (not sure). December security patches too.

Any crashes, or rebots back to TWRP, check the /cache folder as there will be some debugging there, logcat and kmsg to help with.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] rab3072:
H990DS - I'm on the case! Downloading now, here is hoping!
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] TripOG:
H910 on lneage-16.0-20181214-X86CPU

Camera seems to be focusing now, which was my biggest issue on the first build.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] rab3072:
Sad to report same shut down issues on H990DS. Tried both standard kernel and gamma kernel.

---------- Post added at 02:42 AM ---------- Previous post was at 02:19 AM ----------

Also, after restoring a backup, I now fail safety check with magic. Can't seem to get it back working ??

---------- Post added at 03:06 AM ---------- Previous post was at 02:42 AM ----------

Fixed safetynet by wiping system and reflashing everything from scratch
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Grin59:
Awesome, I'm getting an extended battery next week so if the battery life is better I'll go back to this rom.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] TripOG:
Not sure about battery life, I got curious a a few days ago and flashed gamma which was a mistake. My phone gets hot and battery life plummited with gamma on the last build, haven't used this build enough to see if it's improved but I do know gamma made things worse on my phone.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Redline:
[MENTION=2881807]x86cpu[/MENTION]

Logcat and Kmsg from the /cache folder have been uploaded to Google Drive and PM'd to you, there's some things in them I think will be of help, especially in the Logcat.

These were taken after a dirty-flash of 16.0 over a 15.1 install, when the device reboots to TWRP after trying to connect using the modem.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Redline:
Getting immediate shutdowns on boot with a clean flash on the latest build, whereas on the previous build it was only when dirty flashing.

Clean flash logs are also in the folder I PM'd you [MENTION=2881807]x86cpu[/MENTION]

Also getting "Bluetooth keeps stopping" and not being able to continue with setup.

Edit: Still getting the immediate shutdowns on boot if I clean flash the first 16.0 build and then dirty-flash the new one over the top of it.

This does fix bluetooth not working from a clean flash, though. At least in my case my phone was able to see my watch via Bluetooth.

Going to have to revert to 15.1 for now, but hopefully you can make use of the logs to fix things for the next build. Always happy to test even if you PM me a build :)
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] jl10101:
H990 - lineage-16.0-20181214-X86CPU

So I had some issues initially with this build (and of course the previous build), but I managed to get it working ok:

• Remove SIM

• Clean flash LOS 16 09/11 build

• Boot up

• Install MultiSIM app

• Flash Magisk

• Run MultiSIM and disable second SIM (requires root)

• At this point, flash and camera don't work and using a SIM causes shutdown

• Dirty flash LOS 16 14/12 build

• Wipe cache

• Shutdown, insert SIM

• Boot to TWRP

• Install Gamma Kernel (the beta for Pie somewhere in this thread - although there seem to be new betas on AFH)

• Boot LOS

Data works, flash works, BT works, camera (and focus) works, calls work.

• I also flashed the volume mod on the Gamma thread and it's all good too.

GApps:

• Flashed Nano GApps 24/11 but this resulted in the camera and flash not working again (odd?)

• Did the process again but then flash pico GApps 14/12 and this seems to be ok
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Redline:
Interesting. I'd be curious to know if this still works without Gamma Kernel, purely out of curiosity.

I might try this process later on since I've got some spare time and see how I go personally.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] jl10101:
FIngerprint isn't working for me at the moment and then it kills the quick settings / notification pull down...

I know this is due to the Oreo bootstack that I have due to the stock Oreo ROM I was running.

I tried flashing Nougat SuperROM, booting and then going to LOS 15, RR Nougat and LOS 16 and fingerprint is still not working.

What is the best way to get the Nougat boostack back? I'm hoping that it isn't a case of pushing a Nougat KDZ via LGup?

Also: yes, it works without Gamma Kernel.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Redline:
Sadly, KDZ via LGUP is the only way, that I'm aware of, that works as it has access to partitions even TWRP doesn't see. You've basically gotta go through the whole process again :/

Then once you've done that, you've really gotta decide where you wanna have a solid foundation on unless you risk the bootstack issues happening again.

It might be a good excuse to do your best getting a solid LOS 16.0 setup going.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] jl10101:
Thanks! I think I'll have to do that. I am sick of stock and I really like how the second screen is implemented on LOS16.

Do you know if using LGup with a Nougat KDZ will get rid of DirtySanta? I'm 90% sure it won't as it will be an "upgrade" / "downgrade", but again, after rooting, I swore to never mess with that for risk of losing root and having to repeat the DirtySanta process...
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Electrolite_XYZ:
[MENTION=5988026]Redline[/MENTION] Maybe he can flash the V20 prerequisites in the download folder if he has the H918.

[MENTION=4442887]jl10101[/MENTION] also please can you send me this volume mod in the gamma kernel? I'm having some issues with sounds here, volume on headphone is too low and volume on speaker is distorted, I'm using LOS 15.1 and Gamma Kernel.
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] jl10101:
I'm downloading that exact file at the moment and I will have a look through it. But I highly doubt this will work on an H990 :)

Also - check your PM RE volume mod
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Electrolite_XYZ:
OH no halt, abort, someone else flashed this on the H990 and it bricked/didn't boot.

You need to alter the zip file to flash on the H990, it was some pages behind in the thread someone explaning it but I didn't really understand the tutorial.

Seems like you need to swap the stuff in the zip with H990 files, anyway if this doesn't work you can try to use KDZ writer to update a stock nougat file before using LGUP?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EnterTHEvoiD:
I'd do dirty santa again precisely as described and try flashing Los again. I'm assuming you hav the latest twrp?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
I do, but i dont know why dirtysanta gave me problems. First it wouldnt flash TWRP, and it still says that the lock state is locked, not sure what that means. If i redo dirtysanta, i have to flash 13A again then just retry to see if TWRP flashes the first time?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EnterTHEvoiD:
Repeat the whole process from scratch, you must be doing something wrong, https://xdaforums.com/v20/development/ls997vs995h910-dirtysanta-bootloader-t3519410
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] Lillievela:
Alright, ill do that when i have time. But where it says flash SuperSU, could i just flash Magisk? or does it have to be SuperSU?
[LG V20 ROMs, Kernels, Recoveries, & Other Developm] EnterTHEvoiD:
I'd do su first then worry about magisk after flashing Los and booting up to system. Just try and follow every word of the tutorial.