[Android 10.0.0]LineageOS 17.1 [STABLE] - LineageOS 18.0 [PRE-ALPHA] for V40

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serpent android

Senior Member
Nov 13, 2016
229
21
Xiaomi Poco X3 NFC
Hi sir SGCMArkus
I have fast boot but cant enter dl mode on the v40
The phone was previously bricked but by using qfil and xsavis tutorial i was able to get fastboot. But i need download mode for lgup to recognize.any easy way out sir?
 
P

phenomenalblaze

Senior Member
Nov 1, 2017
141
17
OnePlus 9 Pro
Google Pixel 6 Pro
serpent android said:
Hi sir SGCMArkus
I have fast boot but cant enter dl mode on the v40
The phone was previously bricked but by using qfil and xsavis tutorial i was able to get fastboot. But i need download mode for lgup to recognize.any easy way out sir?
Click to expand...
Click to collapse

You need to reflash the laf_a and laf_b to the device to get download mode back
 
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N

NGOwner

Senior Member
Sep 4, 2012
170
69
Kansas City
Is this Lineage build being actively maintained?

Are there any Android 10 ROMs that are being actively maintained for the v40?

[NG]Owner
 
S

SGCMarkus

Recognized Developer
Jan 10, 2011
1,110
2,179
HTC Desire HD
OnePlus 2
Long time no see yall here :)

got 2 news for you:
first of all, new LOS17.1 update, which includes:
September security patch
Updated LOS 17.1 sources
Metadata encryption -> you need to format data and use a special TWRP, which ill make an update for in the TWRP thread, and instructions for usage will follow here
Updated blobs from V405EBW 30b -> you NEED to be on 10 firmware, with pie firmware you wont be able to boot
some DAC fixes
screen-off touch Gestures (Settings -> System -> Gestures)
SELinux is enforcing
maybe more stuff i dont remember

known issues: sometimes bt audio doesnt work properly, investigating

Second news: LOS18.0 is booting, and it works pretty great so far (its based on the latest 17.1 build, so its requirements also count for this build)
Based on Android 11
EARLY build (the things i tested worked, but 99% of Lineage stuff isnt implemented yet, HALs are takes from 17.1 prebuilt, and so on...)
but Wifi, RIL, Audio, DAC, fingerprint, encryption, BT, ... seem to work so far

Will update OP soon with instructions for metadata encryption and links to download :)

Edit: TWRP thread updated

also some more info on 11/LOS18.0:
- Audio HAL upreved to 6.0 + DAC HAL changes to work with that
- SELinux permissive (bringup and so..)
- using more prebuilt LOS17.1 HALs, CAF not dropped for SDM845 yet
- Some build fixes here and there to make it compile/boot/work
- using AOSP bluetooth stack, not Qti

should be up in a few minutes :)
 
Last edited:
N

NGOwner

Senior Member
Sep 4, 2012
170
69
Kansas City
SGCMarkus said:
Updated blobs from V405EBW 30b -> you NEED to be on 10 firmware, with pie firmware you wont be able to boot
Click to expand...
Click to collapse

Some guidance on how to get there.

I'm currently running a Sprint V405UA cross-flashed to LG v405QA. This is a 20e Pie build.

How do I get from 20e Pie to 10 firmware if there is no 10 firmware for the LG v405QA?

Do I crossflash to one of the only 10 versions I can find first, then over to Lineage 17.1?

Is that the procedure?

[NG]Owner
 
S

SGCMarkus

Recognized Developer
Jan 10, 2011
1,110
2,179
HTC Desire HD
OnePlus 2
Thystle said:
Hi,

Would it work on a hard unlocked T-mobile V40? （the device has the bootloader unlocked and has install magisk to root.）
Click to expand...
Click to collapse

As you seem to be the first with an bl unlocked V40 (how did you do that in the first place?), try it, nobody before could.

But if its the same as on the V30, it needs a few different firmware files to work, which shouldnt be too much hasle.
 
H

Hari6677

New member
Oct 12, 2020
1
0
A link to a guide would be awesome

Ok quick question, how to flash it? Any links to a detailed guide(am a noob) and what happens to the camera? Does it work the same way as it did with the stock?
 
T

Thystle

Member
Jan 17, 2017
28
6
SGCMarkus said:
As you seem to be the first with an bl unlocked V40 (how did you do that in the first place?), try it, nobody before could.

But if its the same as on the V30, it needs a few different firmware files to work, which shouldnt be too much hasle.
Click to expand...
Click to collapse

I purchase the phone from a professional seller who have the sources to work and modify V40.

The one he sold me was a bad IMEI T-mobile V40 almost new. He open the back, change another 845 CPU to unlock Bootloader, and remove the network lock of sim card, he refuse to tell me the mechanism or he maybe did not know it, just know how to do it. Then he increase the ram and rom to 8+128 by changing them, modify the phone to be Dual-sim version, and change the battery with the V50's 4000mah.

So technically, my V40 is not a typical T-mobile one.

I got the phone with an unlocked BL and magisk installed.
I've tried the twrp and the Lineage 17.1 you provided.
The twrp goes well, and the flashing of the rom is smoothly,
But it stuck at the lineage os icon and can not boot.

I try to use 9008 mode to just replace the boot_a and boot_b for repairing. It did not work.
I tried 3 times to flash the rom, same results came, just can not go through the booting.

So I give it up and mix flash my phone with the 30b EU LG official kdz.

It looks like the T version is always the hardest one.
 
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    SGCMarkus
    Lineage-OS-Feature-Image-Background-Colour.png


    LineageOS is a free, community built, aftermarket firmware distribution of Android 10.0, which is designed to increase performance and reliability over stock Android for your device.

    LineageOS is based on the Android Open Source Project with extra contributions from many people within the Android community. It can be used without any need to have any Google application installed. Linked below is a package that has come from another Android project that restore the Google parts. LineageOS does still include various hardware-specific code, which is also slowly being open-sourced anyway.

    All the source code for LineageOS is available in the LineageOS Github repo. And if you would like to contribute to LineageOS, please visit out Gerrit Code Review.

    Code: 
    #include "std_disclaimer.h"
/*
 * Your warranty is now void.
 *
 * I am not responsible for bricked devices, dead SD cards,
 * thermonuclear war, or you getting fired because the alarm app failed. Please
 * do some research if you have any concerns about features included in this ROM
 * before flashing it! YOU are choosing to make these modifications, and if
 * you point the finger at me for messing up your device, I will laugh at you.
 */

    What's working:
    • RIL (Calls, SMS, Data)
    • Fingerprint
    • Wi-Fi
    • Bluetooth
    • Camera
    • Video Recording
    • Video Playback
    • Audio
    • Sensors
    • Flash
    • GPS
    • DAC
    • Vibration
    • Wifi Hotspot
    • Selinux enforcing

    What's not working:
    • BT Audio in some situations

    Where are the features? (LOS18.0 edition)
    • LineageOS 18.0 is in early development process so don't complain about xyz features missin or crashing!


    Instructions:
    • you flash in TWRP
    • you DONT inject TWRP (yet, when TWRP is made for metadata, then you can)
    • you reboot to other lots recovery (atm thats lineage one)
    • there you HAVE TO format data/factory reset
    • then you can install gapps and so (by apply update and adb sideload)
    • then boot system

    V40 Telegram group chat

    Downloads:
    GDrive

    Sources:
    Device Tree judypn: judypn
    Device Tree sdm845-common: sdm845-common
    Device Tree lge common: lge common
    hardware/lge: hardware/lge
    Kernel: sdm845
    Vendor: lge
    lineage-17.1 branch

    XDA:DevDB Information
    LOS for Judypn, ROM for the LG V40

    Contributors
    SGCMarkus
    Source Code: https://github.com/LineageOS

    ROM OS Version: Android 10/11
    ROM Kernel: Linux 4.x
    ROM Firmware Required: 10

    Version Information
    Status: Stable + Pre-Aplha

    Created 2019-09-20
    Last Updated 2020-09-20
    View
    10
    S
    SGCMarkus
    Changed the Download Link to point to a folder on my gdrive, which will contain all future builds... There been quite the changes since last release on here and the build in there, so i might have forgotten something:
    - Newer LOS Sources/Security patch
    - Improved Audio
    - DAC has its own HAL now
    - Hotspot fully works now
    View
    9
    S
    SGCMarkus
    I know, its been a while, been busy with uni, but got an update for you (using it as my daily driver)

    Release 02.11.2019
    - Updated LOS sources (October security patch, other things)
    - Switched to Z01R prebuilt Display and Media HALs
    - Building nearly everything except the necessary prebuilt from source (Display + Media HALs)
    - Fixed Wifi hotpot
    - Vibration wont **** up anymore (but is weaker instead for some reason)
    - Tons of other stuff i might have forgotten
    View
    8
    S
    SGCMarkus
    Reporting Bugs
    • DO NOT Report bugs if you're running a custom kernel or you installed Xposed
    • Grab a logcat right after the problem has occurred. (Please include at least a few pages of the log, not just the last few lines, unless you know what you're doing.)
    • If it is a random reboot, grab dmesg . (Do not bother getting a logcat unless you can get it just before the reboot. A logcat after a reboot is useless)
    • If the problem disappears after running "setenforce 0" from a root shell, grab /data/misc/audit/audit.log

    Remember to provide as much info as possible. The more info you provide, the more likely that the bug will be solved. Please also do not report known issues.

    Changelogs

    Release 20.09.2019
    - Initial release

    Release 02.11.2019
    - Updated LOS sources (October security patch, other things)
    - Switched to Z01R prebuilt Display and Media HALs
    - Building nearly everything except the necessary prebuilt from source (Display + Media HALs)
    - Fixed Wifi hotpot (thx to @Xsavi for pointing me into the right direction :) )
    - Vibration wont **** up anymore (but is weaker instead for some reason)
    - Tons of other stuff i might have forgotten

    Release 05.01.2020
    - Updated LOS 17.0 to LOS 17.1 (december security patch, pixel feature drop rebase)
    - Updated Z01R prebuilt Display and Media HALs to final
    - Using V405EBW 20d (November) proprietary files
    - Added SDFAT driver for exfat support by the kernel
    - Few wifi changes
    - other things i may have forgotten

    Release 09.12.2020
    - Updated LineageOS sources, September patch
    - based on V405EBW 30b -> requires 10 firmware
    - enabled A2DP offload + Qti BT Stack
    - Qti power hal + different dt2w
    - fixed offscreen gestures
    - enabled metadata encryption (ext4 + f2fs supported) by using persdata
    - SELinux enforcing (gib logs if something doesnt work properly, so far what i tested it worked)
    - removed some unneeded LG crap
    - rebased kernel on V405EBW 30b + CAF Upstream to 08100, Linux Upstream to 4.9.235
    - fixed DAC issues with avc reset/it turning off automatically
    View
    5
    S
    SGCMarkus
    Frequently Asked Questions:

    Q. Can this ROM be flashed through TWRP?
    A. Yes, proceed with the latest TWRP image

    Q. Sounds good. How can I contribute to project?
    A. Test the build as much as you can and report bugs which can be reproduced with exact steps and are not random.

    Q. How to disable "Apps running in background" dialog?
    A. When you see the dialog, long press on it and select "Settings". From there, you'll have a toggle to disable it.

    Q. Which Models of the V40 are supported?
    A. Tested on V405EBW and V405UA so far, but should work on all, EXCEPT US T-mobile variant.
    View

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