[Android Q&A, Help & Troubleshooting] disrupted_mind:
[HELP][G3][VS985]issue connecting to PC on fastboot, need to reflash TWRP & SuperSU

Hello, thank you for this great forum with helpful members, I'm having an issue with an LG G3 VS985, fastboot won't recognize it while in bootloader, I need to reflash TWRP.

First of all, thank you for reading this long testament [most important details in bold if TL;TR], wanted to be as detailed as possible, maybe it will help you help me better hehe sorry about that.

Let me give you the event sequence if it helps.

> Phone had Cloudy G3 2.5 rooted with SuperSU and TWRP 2.8.6.0 since I rooted it back in 2016.

I was having some issues with phone not recognizing micro sd card and OTG-USB after messing around with encrypting it, I was curious but didn't need it, anyways. Although I dropped the phone in water a couple weeks prior so there is a chance the issue is hardware related.

That was like 4-5 months ago.

Finally decided to do a file backup and reinstall everything yesterday apr-5-2019.

> Rebooted into TWRP and erased everything (data, cache, dalvik, system, even internal storage) because I wanted a new install on everything.

> Flashed the latest official TWRP version for my device (3.0.2.0)

> Had a lot of issues flashing crDroid, found out I downloaded the wrong build, although I had to edit updater-script on the right one to make it work.

> Flashed crDroid 5.2_20190326 with open GApps for Android 9.0 Stock

> First issue encountered, I couldn't charge the phone turned off, because the battery logo appears but but doesn't do the animation and reboots the phone, I read it might be an issue with TWRP.

> Tried to flash SuperSU 2.82 SR5 with TWRP but had a LG secure boot error and couldn't boot up android.

> RE-flashing android and open GApps fixed this issue.

> Re-attempted the process several times, even wiping everything down more than a couple times, including re-flashing android several times to no avail, I was not able to flash SuperSU successfully.

I even flashed an old tool "MR.Bump" but system kept unrooted so unsuccessful.

> Reflashed Android for the last time and start reading again (after 8 hours attempting to do it well), I read that TWRP version might be the problem to flash SuperSU, so

HERE is where I have the current issue:

> Downloaded the official TWRP version 3.1.0 and flashed it.

There is no official support for 3.1.0 for the VS985 so I'm guessing it was a generic .img, of course I messed up TWRP.

> Downloaded and installed official LGMobile Drivers 4.2.0 (latest), downloaded android drivers (15 second ADB installer 1.4.3) and Android platform tools 28.0.2 on windows.

> When conected in PTP and transfer files in win7 it recognizes all the drivers well, was able to reboot the phone into bootloader from android platform tools successfully, means there is good communication between the device and PC.

The issue is once the phone is in the bootloader and trying to flash TWRP, win7 has issues installing CDC serial drivers, in the end in device manager all drivers seems installed but win notification center says there was a problem installing LGE AndroidNet for VZW USB Modem, seems to be issues with CDC Serial or something, when trying to access the properties on the VZW USB Modem it freezes so there's an issue here.

That means when doing adb devices or fastboot devices command, doesn't find anything.

Tried the same in win10, had different driver problems but in the end everything gets installed after rebooting. Same issue, no response from phone when in bootloader.

Message is "Waiting for any device".

Maybe there is an issue with some low-level driver/kernel/firmware that is creating this issue, I would even consider to flash stock LG Android to start from scratch, if you have any guide on how to do it please provide the links!

Additional note: When connecting the phone in USB Tethering win7 gives bluescreen.

> FORTUNATELY I messed TWRP but the phone can still boot android so it's not rendered unusable (yet lol).

I must admit I wasn't super careful downloading some stuff, I did it old school (trial and error) and most of the times it works, I consider myself being a little tech savvy, but right now I'm stuck, I guess I could continue using the phone like this but if I have any issues it would be difficult to resolve and I would lose functionality without root (I could live unrooted though but I wanna resolve this) and honestly I love the G3 so why change it? haha.

BTW I found these on the net, do you recommend it? what TWRP do you recommend for the VS985?

I downloaded and wanted to install this one https://xdaforums.com/lg-g3/development/recovery-unofficial-multirom-twrp-artx-t3657524

and found this one supposedly 3.2.1 for the vs985 here: https://basketbuild.com/devs/yshalsager/TwrpBuilder/lge/vs985

Any help will be greatly appreciated.

Cheers.