TWRP doesn't fully start (H870) - LG G6 Questions and Answers

Hello! I have unlocked the bootloader but haven't installed any custom rom and haven't given root yet. After flashing TWRP via "fastboot flash recovery twrp-3.3.0-0-h870.img" and booting into recovery via "fastboot reboot", pressing voldown+power and confirming factory reset, the TWRP logo shows for a few seconds and then the device normally boots without starting TWRP.

fixed by using this unofficial twrp - https://forum.xda-developers.com/lg-g6/development/twrp-t3828254

Related

Unable to boot to TWRP (US W09)

I recently received my US version M3 - 64GB W09. I've since successfully unlocked it and now trying to get TWRP loaded. I downloaded the greatslon TWRP for US models referenced in this thread (twrp-m3-us-greatslon) and did a fastboot flash that seemingly completed successfully. Every time I try to boot to recovery however (power + vol up), I get to the Huawei eRecovery, not TWRP.
Is there something Im missing here?
Thanks!
I believe to use the up button you would flash TWRP to recovery2.
Have you tried holding down when booting?
Vol down boots to the bootloader. I did finally find a couple other ways to boot to TWRP. adb reboot recovery and the "Recovery Reboot" app from the Play store both boot to TWRP.

Issue with unlocked bootloader

Hey,
I had AOSP rom and i decided to go back to OOS. (xXx rom)
I entered TWRP, Cleaned Data,Cache,Dalvik,System.
And Factory reseted it.
Installed the xXx rom, and i got on the splash screen instead of "Bootloader Unlocked"
And i'm getting "<!>"
And i couldn't boot.
And i can't press volume keys to get to recovery or bootloader, but it boots straight to bootloader.
i entered to TWRP again (Via bootloader), reflashed stock OOS.
It booted, and then i entered bootloader to flash TWRP again, and it didn't succeeded
I enter only Stock Recovery and every time i try to flash Recovery it's succeed but it's does nothing, still entering Stock OOS recovery.
Now i stuck at stock OOS, and stock rocevery.
Can't flash anything.
Can someone tell me what to do?
Best is via ADB flashing latest BlueSpark TWRP (fastboot devices, fastboot flash recovery (name of TWRP).img and then format all so you start with a clean plate. Then move your ROM from PC to Internal and proceed further. But IMO a "format" is needed. Also siakantabg made a flashable zip from the old bootloader. Flash this zip in TWRP first after formatting en wiping everything.
Link old bootloader: https://forum.xda-developers.com/oneplus-5/themes/mod-bootloader-changer-t3800862

"your device software cannot be checked for corruption" after installing twrp, help!!

"your device software cannot be checked for corruption" after installing twrp, help!!
Hello, as title says, following oem unlock procedure, i flashed twrp using fasboot however i could never boot it and now when i try to go to fastboot mode and/or reboot, i see this message "your device software cannot be checked for corruption[...] please lock bootloader"!! Dunno what to do? Please help!
Easy: do absolutely nothing, this is intended behaviour. Unlocking the bootloader leads to the displaying of this message on boot up. Just LG's way of saying continue at your own risk.
Ok so they're even more annoying than samsung..! Anyway, my problem is : how do i enter TWRP..? I flashed again, successfully.. Then i dunno how to enter it!
"The stock recovery appears but you have to select the factory reset option and it will boot into TWRP" i read this. Well it's wrong. Doing so just launch the factory reset!
This video https://www.youtube.com/watch?v=MR4DTgTxhGI shows phone reboots to TWRP after entering "fastboot reboot" (once recovery was flash) : here it just reboots normally!
"Finally Type “fastboot boot TWRP-Recovery-filename.img” to boot your LG G6 into TWRP Recovery" well i thought about that and tried it :
D:\Android\ADB&Fastboot>fastboot boot recovery.img
downloading 'boot.img'...
OKAY [ 0.901s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.925s
I'm very disapointed so far, i expected the G6 to be easier to handle the S7 but it's a pain even before i start using it.. Hell!!
It seems to me that you didn't boot into twrp immediately after flashing it via fastboot. Afaik it's important that you don't boot into OS after flashing, otherwise twrp will be overwritten with stock recovery. I had the same problem when I did the procedure.
The only way I got it to work was booting into twrp via button combo immediately after flash (you know - keep pushing power and vol- until Lg G6 logo appears, release only power and immediately push it again, keep 'em pushed until factory reset, confirm twice and it should boot into twrp). Once you've booted into twrp directly after flashing, it should stick.
grushnickij said:
It seems to me that you didn't boot into twrp immediately after flashing it via fastboot. Afaik it's important that you don't boot into OS after flashing, otherwise twrp will be overwritten with stock recovery. I had the same problem when I did the procedure.
The only way I got it to work was booting into twrp via button combo immediately after flash (you know - keep pushing power and vol- until Lg G6 logo appears, release only power and immediately push it again, keep 'em pushed until factory reset, confirm twice and it should boot into twrp). Once you've booted into twrp directly after flashing, it should stick.
Click to expand...
Click to collapse
After doing this, for TWRP to stick, you have to flash a custom rom, or delete the system/bin/install-recovery.sh to prevent stock recovery overtwrite

[FIXED] Lg G6 [H870] TWRP recovery problem

So i wanted to finally install custom ROM on my LG G6 H870, needed twrp... obv, followed all the instructions:
adb devices - showed my device all was good
2nd: adb reboot bootloader
3rd: fastboot flash recovery twrp.img
4th: fastboot reboot + holding volume down and power button, on logo released power button and pressed it down again, finally got to factory data reset 2 YES options and saw the Teamwin bootup logo, but then phone just booted up normally...
5th: Tried to open recovery once more, but then it did regular Data erease.
What could be wrong?
Razexay said:
So i wanted to finally install custom ROM on my LG G6 H870, needed twrp... obv, followed all the instructions:
adb devices - showed my device all was good
2nd: adb reboot bootloader
3rd: fastboot flash recovery twrp.img
4th: fastboot reboot + holding volume down and power button, on logo released power button and pressed it down again, finally got to factory data reset 2 YES options and saw the Teamwin bootup logo, but then phone just booted up normally...
5th: Tried to open recovery once more, but then it did regular Data erease.
What could be wrong?
Click to expand...
Click to collapse
Which TWRP did you flash ? Bootloader unlocked ?
Razexay said:
So i wanted to finally install custom ROM on my LG G6 H870, needed twrp... obv, followed all the instructions:
adb devices - showed my device all was good
2nd: adb reboot bootloader
3rd: fastboot flash recovery twrp.img
4th: fastboot reboot + holding volume down and power button, on logo released power button and pressed it down again, finally got to factory data reset 2 YES options and saw the Teamwin bootup logo, but then phone just booted up normally...
5th: Tried to open recovery once more, but then it did regular Data erease.
What could be wrong?
Click to expand...
Click to collapse
I had exactly same problem when I did this = only Teamwin bootup logo and then boot into android (I hope your bootloader is unlocked first).
Solution was you have to use TWRP 3.1.1-0 and u get into recovery. I tried more versions of TWRP (3.2.1-0 , 3.2.2-0 , 3.2.3-0) but ONLY 3.1.1-0 works and I dont know why.
Anyway I got another issue after because I didn't want to install root yet (first I wanted to backup).
An issue was I got into restarting loop by installing no-verity-opt-encrypt 6.0 which should be a solution for boot into android without losing TWRP (considering to one walkthrough I found).
I was lost for a while but I found a solution = install another boot.img (in my case I installed one dm-verity or dm-verity & forceencrypt zip file - btw what is a difference between them?).
Oh wow.. Well thanks, ill try your solution as soon as i get time. Bootloader is unlocked indeed, used latest twrp. I'll try 3.1.1-0.
@ Razexay
that happened to me also with Official TWRP take that from Eliminater74 that's where backup and encryption work with dm-verity & forceencrypt look here in the forum everything is well described
https://forum.xda-developers.com/lg-g6/development/twrp-t3828254

[HELP] Can't Boot Into Any Recovery

Hello,
Previously I had flashed LineageOS v18 which had few bugs.
Then I flashed Android 10 official beta downloaded from Asus site (UL-ASUS_X00P-WW-AOSP-17.00.2003.23-user.zip).
Now I want to go back to another custom ROM but I am unable to boot into any recovery - stock recovery as well as TWRP.
- I have confirmed the bootloader is unlocked.
- Can't boot into stock recovery. Phone directly boots into OS.
- Tried "installing" TWRP in fastboot mode (fastboot flash recovery.img). Installation goes fine but when I reboot, the phone boots straight to OS instead of going into recovery.
- Tried "booting" TWRP in fastboot mode (fastboot boot recovery.img). Installation goes fine but when I reboot, the phone boots straight to OS instead of going into recovery.
- Tried both methods for booting into recovery (pressing the buttons as well as giving a command via fastboot).
Questions:
1. How can I boot into recovery?
2. If I can't boot into recovery, what can I do to flash a custom ROM?

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