[OFFICIAL] LineageOS 18.1 for the LG V20

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nostupidthing

Senior Member
Nov 1, 2012
1,102
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interesting finding i think what i got is actually us996 (just found out serial no says lgus996...., probably the seller crossflashed to h910 without me knowing)

so when i flash the us996 modem, it boots ok, then i migrate to us996 build and twrp to us996 as well, the screen become a lot of noise/static during boot, which wasn't before

in short
us996 device
h910 los18 rom 20211104 + us996 modem = ok
us996 los18 rom 20220102 + us996 modem = ok but noise/static screen during boot

also in windows explorer even with us996 rom still says LG-h910
 

AShiningRay

Senior Member
Sep 1, 2021
119
48
Xiaomi Redmi Note 4
LG V20
interesting finding i think what i got is actually us996 (just found out serial no says lgus996...., probably the seller crossflashed to h910 without me knowing)

so when i flash the us996 modem, it boots ok, then i migrate to us996 build and twrp to us996 as well, the screen become a lot of noise/static during boot, which wasn't before

in short
us996 device
h910 los18 rom 20211104 + us996 modem = ok
us996 los18 rom 20220102 + us996 modem = ok but noise/static screen during boot

also in windows explorer even with us996 rom still says LG-h910
That's because other models are unlocked through the engineering bootloader and the DirtySanta(DirtyCOW) exploit, while the us996 can be unlocked officially... Or at least it could a while ago. That exploit makes it necessary that the kernel provides a way around that garbled video during boot on those other models. According to @xxseva44, it's related to the proximity sensor and booting the phone with your finger blocking it "fixes" the screen noise. But since your device is a us996, simply unlocking it officially would be better. But then you can also flash an h910 kernel over that us996 rom and possibly also solve that boot issue.

At the end of the day, it depends on which kind solution you want.
 

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
ahhh i didn't know that, i though it was a h910 so i unlocked/rooted using the common root method, is there anyway to revert and "officially" unlock it now?

static screen doesn't bother me that much though

wifi instability is more of a problem

ahh i just checked lg has stopped the bootloader unlock service
 

AShiningRay

Senior Member
Sep 1, 2021
119
48
Xiaomi Redmi Note 4
LG V20
ahhh i didn't know that, i though it was a h910 so i unlocked/rooted using the common root method, is there anyway to revert and "officially" unlock it now?

static screen doesn't bother me that much though

wifi instability is more of a problem

ahh i just checked lg has stopped the bootloader unlock service
Yep, unfortunately they seem to have closed that service, so the best approach you have is using that us996 rom with the modem that works best for you and also a h910 kernel to solve that screen glitch at boot. I don't think the h910 kernel will break things on your us996 since they're basically identical except for that unlock procedure.
 
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nostupidthing

Senior Member
Nov 1, 2012
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269
Yep, unfortunately they seem to have closed that service, so the best approach you have is using that us996 rom with the modem that works best for you and also a h910 kernel to solve that screen glitch at boot. I don't think the h910 kernel will break things on your us996 since they're basically identical except for that unlock procedure.
thanks! probably I'll flash h910 again for the next update... particularly no benefit in flashing us996 except the static screen anyway
 

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
Oddly enough you need the really old versions of twrp. I forgot the exact version but it would've been bundled with your root guide. From there, format data and reboot.
thanks a lot! so i need to wipe again.... yikes....

one last question for time being, if the device is already bootloader unlocked (which I think so bcs otherwise the seller couldn't have flash h910 rom on it), is it possible to revert to stock and keep the unlocked bootloader? is flashing a stock kdz ok? or if there is anyway to check?

then with unlocked bootloader i can still install twrp and los?

thx alot guys.
 

xxseva44

Senior Member
thanks a lot! so i need to wipe again.... yikes....

one last question for time being, if the device is already bootloader unlocked (which I think so bcs otherwise the seller couldn't have flash h910 rom on it), is it possible to revert to stock and keep the unlocked bootloader? is flashing a stock kdz ok? or if there is anyway to check?

then with unlocked bootloader i can still install twrp and los?

thx alot guys.
Well if you want to be on stock, just dont flash a rom on top and flash the patched kernel which would've been with your guide. If they didn't link one, use mk2000. You should already have twrp. Do not flash a kdz, you're basically restoring the software on the phone. If you want stock, use alpha omega, weta, etc, theres a post on the v20 thread which has them linked. And you can use los with the unlocked bootloader.
 
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nostupidthing

Senior Member
Nov 1, 2012
1,102
269
Well if you want to be on stock, just dont flash a rom on top and flash the patched kernel which would've been with your guide. If they didn't link one, use mk2000. You should already have twrp. Do not flash a kdz, you're basically restoring the software on the phone. If you want stock, use alpha omega, weta, etc, theres a post on the v20 thread which has them linked. And you can use los with the unlocked bootloader.
thx a lot

what im thinking is that if i have unlock bootloader then it will be nice to get rid of the red logo during boot right?

but then i just remember, usually bootloader unlock will still give you some kind of warning anyway, so that's a wash.

so probably i'm going to stick with it and just flash los h910

i prefer los to stock

thx!!!
 

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
umm i just flash back to twrp-3.0.2-1-us996 and format data, then update twrp and install los, then encrypt and set pin

but still cannot decrypt in twrp....
 

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
ok, i need rest and here is the outstanding issues

1. encrypted phone cannot be decrypted in twrp (tried old and new twrp)
2. wifi unstable
3. gpu driver outdated (cannot run filmic pro)

cheers.
 
Last edited:

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
hi
Same issue with our h910 on current LOS release. I have tried several baseband versions from android 7 but no change. This issue is when WiFi is off or not connected. LTE signal from tower is 4 bars. Speed test is blazing fast. But all apps come to a halt and can't get data to work correct.

Phone calls OK. APN settings OK. I am at a loss as to why data speed test is great but apps not getting data from internet. Yes once in a while they work sporadically but its hit and miss.

Location works using GPS navigating app that has maps saved on phone.
is it ok if we get some logcats for devs to see?

my wifi is working very spordic here... i use wifi mainly, put my phone in airplane mode and enable wifi, but it keeps disconnecting and re-connecting. tried several modem, no improvement...
 

npjohnson

Recognized Developer
hi

is it ok if we get some logcats for devs to see?

my wifi is working very spordic here... i use wifi mainly, put my phone in airplane mode and enable wifi, but it keeps disconnecting and re-connecting. tried several modem, no improvement...
file a bug like the wiki says on gitlab
 
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npjohnson

Recognized Developer
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AShiningRay

Senior Member
Sep 1, 2021
119
48
Xiaomi Redmi Note 4
LG V20
sure... i'm switching back to h910-10r modem for now and see how it goes.

@AShiningRay can you do for the modem? I'll file one for decrypt and gpu driver

TWRP decrypt fail: https://gitlab.com/LineageOS/issues/android/-/issues/4335
GPU driver outdated: https://gitlab.com/LineageOS/issues/android/-/issues/4336
Actually, the modem also isn't handled by lineage nor TWRP, that's on a different partition and relies on the firmware, and is also a proprietary blob that we can't develop directly on, so filing an issue for it doesn't make much sense unless it was for finding a way to circumvent the Wi-Fi/SIM problems, but i hardly think that's caused by lineage code. The only way of "fixing" those, if possible, is by testing lots of modem versions then making a knowledge base about them here on xda, and we also need to take into account the multiple phone variants.

Mine is a h910 and i don't face those connection problems with the modem currently on it for example, but i only tested on 2.4GHz. I'm also on LOS, but that's a custom build that we're using to test the 4.4 kernel, so it isn't exactly the same device tree that's on the official builds.
 

nostupidthing

Senior Member
Nov 1, 2012
1,102
269
Actually, the modem also isn't handled by lineage nor TWRP, that's on a different partition and relies on the firmware, and is also a proprietary blob that we can't develop directly on, so filing an issue for it doesn't make much sense unless it was for finding a way to circumvent the Wi-Fi/SIM problems, but i hardly think that's caused by lineage code. The only way of "fixing" those, if possible, is by testing lots of modem versions then making a knowledge base about them here on xda, and we also need to take into account the multiple phone variants.

Mine is a h910 and i don't face those connection problems with the modem currently on it for example, but i only tested on 2.4GHz. I'm also on LOS, but that's a custom build that we're using to test the 4.4 kernel, so it isn't exactly the same device tree that's on the official builds.
but on stock it's no problem so i think it's some interaction between kernel and firmware, we may pick one firmware and work on it?

@A.Whit what do u think?
 

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  • 1
    what is a work around to delet or disable the
    "fusedlocation" spyware?

    i do not want that on anyphone i own. there are a few roms i can disable that with but lineage 18 is now softbricked if i delete that spyware.

    i totally understand many people want it.
    i do not want it.
    It is a core part of Android, and not removable.

    It is not spyware. You can go look at the source.
    This is gonna sound silly at this point but here goes: I was never sure how the DAC toggle works. Is it the same as stock roms where it turns it on but with the difference that high impedance is always on?
    Same as stock.
    1
    Can you try lineage recovery? I don't think this would happen there.
    Yes i can test it. I will let you know. Thanks for your effort.
    1
    Does anyone know if LOS 19.1 will be available for the LG V20?
    Nope. Kernel is 3.18 which can't ever properly work with android S.
    1
    18 is bad. does not work correctly. i was stupid and jumped the gun & made my edc 18. now i am dieing to get back to what worked correctly (17 works) . but 17 just reboots back to the os over and over since i put 18 on it
    Then you're doing something wrong. It works for everyone else. Follow the guide from 0 and it will work.
    1
    Just got an urgent text notification from my carrier Metro By T-Mobile (formerly MetroPCS):


    Does anyone recommend a good carrier in the USA that doesn't require VoLTE?
    if you haven't noticed by now, everyone will be requiring VoLTE but that and VoWiFi both are industry hot messes for the last decade (this has been causing so many problems for me through supporting my parents in the last couple months).

    my recommendation is move your phone number to a voip service, like google voice (for americans), then you can at least avoid some of the hassles, but still may potentially be issues calling 911 as that is not really clear (and likely also broken by ATT whitelist crap).
  • 22
    lineage-os-logo.png

    LG V20

    Code:
    - Your warranty is now void.
    - You have been warned.
    - Use at your own risk.

    Introduction:
    This is the Official Lineage OS 18.1 thread for the LG V20.

    Downloads:
    Please follow the install instructions in your device's Wiki page linked below exactly, and make sure your device's firmware matches the required firmware listed.
    If you don't follow these instructions, or use 3rd party add-ons (like Magisk) please don't expect support here.

    Known Bugs:
    • IMS (VoLTE/Wi-Fi Calling) doesn't work due to framework tie-ins used by the LG proprietary binaries.
    • Find any? Report them according to this guide.
    Notes:
    • The only supported GApps package at the moment is MindTheGapps, linked on our Wiki page about gapps.
    Kernel Source: https://github.com/LineageOS/android_kernel_lge_msm8996
    6
    On my LG v20 H910 with LOS 18.1 lineage-18.1-20210722-nightly-h910-signed.zip
    (nothing else installed, no gapps, no mods, no root, etc...) the "LOS SNAP CAMERA" VIDEO record sound volume is almost 0%

    SAME ISSUE ON Lg v20 H918 !!!!!!! I have that phone also.

    After days of research and playing with mixer_paths_tasha.xml settings I gave up..... PROBLEM VERIFIED: its a LOS snap camera apk issue.

    Then I installed ROM [android 11] UNOFFICIAL SuperiorOS-Xcalibur

    https://forum.xda-developers.com/t/...96-11-unofficial-superioros-xcalibur.4248255/

    COMING FROM LINEAGE/RR:

    1. Boot into twrp
    2. Do a regular wipe (not format)
    3. Flash Superior zip
    4. Flash magisk (optional but recommended)
    5. Wipe dalvik
    6. Reboot

    CAMERA VIEDO WORKS PERFECT !!!!
    PERFECT SOUND !!!



    To LOS maintainers: Fix the LOS SNAP CAMERA apk or quit screwing around with programming android ROMs. Simple as that. I am a MSEE engineering manager and if I cant do my job right I don't do it at all.


    The LOS snap camera has been broken for a very long time (years) and many people have had to use GCAM or Open Camera and all these people including myself are sick that LOS maintainers can't fix a simple but very important apk in LOS (CAMERA video sound issue). This is well documented all over LOS wiki and github etc.....

    FROM: bernardobas, Senior Member


    "Hi @npjohnson
    Open Camera (and BSG GCam 8.1) uses unprocessed-mic by default to get audio while recording video."


    I am done with LOS until this is fixed. YOU ARE WASTING MY TIME
    Yeah, considering h910/h918 are near identical, makes sense that they both suffer.

    By your own statement, you're an engineer, and should be able to discern based on the info you gave me that it is _not_ an issue with the "Snap Camera apk", instead that we are using compressed audio path, and clearly it isn't processing right (likely a codec issue like I mentioned several posts ago). We could swap it to unprocessed mic input, but that will be garbled and awful - only using that as a last resort as opposed to actually fixing the compressed audio route.

    As for the insults launched - k, stop using lineage then. I literally have not a care in the world whether you use it. I'm doing hard work for free, which, as an engineer, you should understand is often thankless, and your naggy/attacking comments only make me want to never touch the device again :)

    I'll be looking at it sometime this week, but for everyone else on this thread who has been kind and supportive lol.
    5
    On my LG v20 H910 with LOS 18.1 lineage-18.1-20210722-nightly-h910-signed.zip
    (nothing else installed, no gapps, no mods, no root, etc...) the "LOS SNAP CAMERA" VIDEO record sound volume is almost 0%

    SAME ISSUE ON Lg v20 H918 !!!!!!! I have that phone also.

    After days of research and playing with mixer_paths_tasha.xml settings I gave up..... PROBLEM VERIFIED: its a LOS snap camera apk issue.

    Then I installed ROM [android 11] UNOFFICIAL SuperiorOS-Xcalibur

    https://forum.xda-developers.com/t/...96-11-unofficial-superioros-xcalibur.4248255/

    COMING FROM LINEAGE/RR:

    1. Boot into twrp
    2. Do a regular wipe (not format)
    3. Flash Superior zip
    4. Flash magisk (optional but recommended)
    5. Wipe dalvik
    6. Reboot

    CAMERA VIEDO WORKS PERFECT !!!!
    PERFECT SOUND !!!



    To LOS maintainers: Fix the LOS SNAP CAMERA apk or quit screwing around with programming android ROMs. Simple as that. I am a MSEE engineering manager and if I cant do my job right I don't do it at all.


    The LOS snap camera has been broken for a very long time (years) and many people have had to use GCAM or Open Camera and all these people including myself are sick that LOS maintainers can't fix a simple but very important apk in LOS (CAMERA video sound issue). This is well documented all over LOS wiki and github etc.....

    FROM: bernardobas, Senior Member


    "Hi @npjohnson
    Open Camera (and BSG GCam 8.1) uses unprocessed-mic by default to get audio while recording video."


    I am done with LOS until this is fixed. YOU ARE WASTING MY TIME
    Maybe you should go back to stock? You do realize we do this for free and on our own time? If there are any issues we try to fix them ASAP but with your comments I doubt @npjohnson is going to want to support the device anymore. If there is any issue I would recommend reporting it in a less-hostile way and it might be a simple fix rather than insulting the primary dev for LOS on the device who may now not want to support the device anymore...
    4
    Moderator Announcement

    Thread slightly cleaned!

    This is a development site and people contribute work as a fun hobby, NOT A JOB! They don't owe you anything but you owe the developers respect!
    If a ROM does not work for you, what did you do to contribute? Did you clean flash? More important, did you run a log of errors to help the developer? Just remember what you would expect in your profession. Or were you just too lazy to help and prefer to leech and complain?
    This world will only get better if we all learn to give instead of always taking! Please do not comment on rude posts, please report and a moderator will help.
    Thank you all for your cooperation.

    Regards
    Oswald Boelcke
    Senior Moderator
    3
    Will you working on Lineage OS 19?
    Lineage OS 19 is based on Android 12, so the chance of it even booting on the current 3.18 kernel is very slim, we'll need to update a lot of things including a major kernel version bump to reach a reasonable state to port anything Android 12 so it will likely take a while. Even kernel 4.4 still requires a ton of patching to be able to boot android 12