[ROM] 4.2.2 Flashable [V500] JDQ39B.V50010A_US [easily go back to stock 4.2.2]

[Drgravy]

Stock LG build JDQ39B.V50010A US + BusyBox + Root + TWRP
for LG G Pad 8.3 V500 ONLY!
Android 4.2.2

Disclaimer:
I am not responsible for anything you do to your device but I will do my best to assist if something goes wrong!


Purpose:
My purpose for making this is that I wanted a easy way to go back and forth between 50020B and 50010A. I have tested this a few times and it works well. much easier than flashing the kdz. Also aosp roms dont play well with the 4.4.2 bootloader but they work great with 4.2.2. so if anyone decides to use this let us know how it goes


Features:

• Official Stock 4.2.2 LG build JDQ39B.V50010A US + Stock 4.2.2 Kernel
• NO Data Wipe (you get to keep: data/media Ex. photos, music and such)
• flashes over existing Recovery and ABOOT (you get the right TWRP for this firmware)
• SuperSU 1.94 + su binary Installed
• BusyBox 1.22.1-Stericson Installed
• Wipes Dalvik-Cache and Cache partition

Download

LG-V500_JDQ39B.V50010A_US_Stock-BB-Rooted.zip


Install:

1. Boot into TWRP recovery.
2. Wipe --> factory reset
3. Make a Full backup before proceeding. (optional)
4. Flash .zip file in TWRP recovery.
5. Go take a walk, make some coffee, pace around nervously. Keep Calm... this will take a while! Be patient!!
6. Reboot device.
7. now restore or flash your favorite AOSP rom

Credits:
@id10terror as this is based on his rom zips so please stop by one of his threads and thank him
@Jessooca for supplying the KDZ this is based off of http://forum.xda-developers.com/showpost.php?p=51468259&postcount=8
@autoprime - for 4.4.2 initial root method
@Chainfire - for SuperSU and install script
@jazzruby - BusyBox install script

 

[Drgravy]

one more for me

 

[id10terror]

Thanks for putting this together! This will help a lot of people! :good:

 

[atlharp]

Blessed be thy name! Flashed and now I don't have that crappy dimming issue now. Thank you so much! :thumbup::thumbup::thumbup::thumbup:

 

[AdThiago]

Thanks a lot!
it works very fine here!

 

[magnum73]

Do we have to wipe everything and do a factory reset...? But the discription says we keep data? A bit confused....

Sent from my LG-V500 using XDA Free mobile app

 

[Natakranta]

Do we have to wipe everything and do a factory reset...? But the discription says we keep data? A bit confused....

Sent from my LG-V500 using XDA Free mobile app

If you are using twrp then in wipe tab go to advanced and choose data, system, cache and dalvik. That's what i did. Then flash the LG rom.
As you wiped data your apps will be restored from play store. It would be wise to make backups with titanium and saved them on your PC so you can restore some/all user app data. Don't restore any system data.

So having 4.2.2 bootloader back on my device I'm restoring nandroid of my last clean flash which was SlimKat 4.8. Then I'll flash 4.9 over it to have access to sd card until tomorrow when I'll clean flash incoming SlimKat 5.0
I'm a Slim man as you can see from my signature.
@Drgravy, this 4.2.2 flashable zip is a life saver for those who like me experimented with LG 4.4.2 but want to come back to 4.2.2 bootloader to get rid of the dimming. Thank you so much!
Since now I'm going to call you Profesor Gravy

 

[Drgravy]

Do we have to wipe everything and do a factory reset...? But the discription says we keep data? A bit confused....

Sent from my LG-V500 using XDA Free mobile app

all that means is you get to keep your data/media
Ex. photos,music and such
if you dont do a factory reset you will probably end up in a boot loop

If you are using twrp then in wipe tab go to advanced and choose data, system, cache and dalvik. That's what i did. Then flash the LG rom.
As you wiped data your apps will be restored from play store. It would be wise to make backups with titanium and saved them on your PC so you can restore some/all user app data. Don't restore any system data.

So having 4.2.2 bootloader back on my device I'm restoring nandroid of my last clean flash which was SlimKat 4.8. Then I'll flash 4.9 over it to have access to sd card until tomorrow when I'll clean flash incoming SlimKat 5.0
I'm a Slim man as you can see from my signature.

@Drgravy, this 4.2.2 flashable zip is a life saver for those who like me experimented with LG 4.4.2 but want to come back to 4.2.2 bootloader to get rid of the dimming. Thank you so much!
Since now I'm going to call you Profesor Gravy

HAHA be sure to thank @id10terror also this is based on his flashable roms
anyways glad it helped you out

 

[yawako]

The version of TWRP that comes with this ROM please?

 

[Natakranta]

The version of TWRP that comes with this ROM please?

2.7.0.0 IIRC

Sent from my Nexus 5 using Tapatalk

 

[El Montezuma]

If you are using twrp then in wipe tab go to advanced and choose data, system, cache and dalvik. That's what i did. Then flash the LG rom.
As you wiped data your apps will be restored from play store. It would be wise to make backups with titanium and saved them on your PC so you can restore some/all user app data. Don't restore any system data.

So having 4.2.2 bootloader back on my device I'm restoring nandroid of my last clean flash which was SlimKat 4.8. Then I'll flash 4.9 over it to have access to sd card until tomorrow when I'll clean flash incoming SlimKat 5.0
I'm a Slim man as you can see from my signature.

I'm currently on Cm11 coming from 4.4.2 stock with brightness issue...

If I do a nandroid backup first of my current CM11, then I flash this one to go back to 4.2 and then restore my CM11 nandroid backup, will it work?

As far as I understood, the brightness issue is just bootloader related, so I don't know if my nandroid backup will erase the bootloader or not...

 

[Natakranta]

I'm currently on Cm11 coming from 4.4.2 stock with brightness issue...

If I do a nandroid backup first of my current CM11, then I flash this one to go back to 4.2 and then restore my CM11 nandroid backup, will it work?

As far as I understood, the brightness issue is just bootloader related, so I don't know if my nandroid backup will erase the bootloader or not...

Nandroid never backs up bootloader. So it should work as good for your CM as it worked for my SlimKat.
Though there is now easier method. See this thread:
[HOWTO][V500] Flashable zips to change between 4.2.2 and 4.4.2 Base and flash 4.2.2 base.

 

[El Montezuma]

Nandroid never backs up bootloader. So it should work as good for your CM as it worked for my SlimKat.
Though there is now easier method. See this thread:
[HOWTO][V500] Flashable zips to change between 4.2.2 and 4.4.2 Base and flash 4.2.2 base.

Great! Sounds good, will try it.
Many thanks

 

[El Montezuma]

Ok, just to confirm that it works.

My tab was on 4.4.2 out of the box. I install CM11 directly without reading a little (my mistake), and I discover brightness dimmer issue... I play with Lux to try to find a solution during a week but no success...

So, the solution is to revert back to 4.2.2 stock (or to a rom based on 4.2.2 stock) to install the correct bootloader and then restore your 4.4.2 Nandroid backup.

Here the steps:
-Nandroid backup of your tab
-Titanium backup (in case of, double protection)
-Copy the zip into the internal memory of the tab
-Reboot in recovery mode
-Do a factory reset (wipe system, cache, data (except data/media))
-Flash the zip
-Wipe dalvik/cache (not mandatory but...)
-Reboot into recovery mode FROM recovery (do not reboot system at this point)
-Restore your Nandroid backup
-Reboot system
-Enjoy

Cheers

 

[Metera]

its flashing for about 3 hours now and is still going on.. was that meant with to be patient or is there something wrong? Having brightness issues on CM rom and have 4.4.2 base... that's why im trying to flash this.


Extracting busybox...
Done.

Extractiong images to flash...

 

[NexusPenguin]

Hi,

The OP is nice... but the problem when you want to downgrade from 4.4.2 to 4.2.2 is that in 4.4.2 it's difficult to boot into recovery.

And I'm looking for a way to root, unlock and install a recovery on my LG G Pad 8.3 with FW 1020D installed.

I am able to root it, that's not a problem.

But when I install a Recovery using Flashify and then reboot, I end up with a LG screen with two lines at the top saying that boot is void because of security check failure.

Isn't there a simple way to flash this beast ?

And why on earth are those stupid [email protected] at LG forcing us to use their stupid, inefficient and BUGGY software ?

Regards.

 

[Shiggity]

I've been flashing this to my GPad, and it keeps booting into TWRP, and ONLY TWRP. I sold my GPad on eBay, and I need to ship it out soon since the buyer paid, and I'm sure he'd want it in hand sooner rather than later. What am I doing wrong? I'm in process of trying this again, but I dunno if it'll matter since it failed twice already....


Suggestions?

EDIT: Also if there's a way to relock the bootloader and unroot that'd be great too. Thanks.

EDIT 2: I know that you can use the LG Mobile Support Tool but it needs a native (apparently won't work in a VM too well) Windows install, of which I do not have at the moment. Is there a way to do it on Mac OS X 10.9?

 

[Natakranta]

I've been flashing this to my GPad, and it keeps booting into TWRP, and ONLY TWRP. I sold my GPad on eBay, and I need to ship it out soon since the buyer paid, and I'm sure he'd want it in hand sooner rather than later. What am I doing wrong? I'm in process of trying this again, but I dunno if it'll matter since it failed twice already....


Suggestions?

EDIT: Also if there's a way to relock the bootloader and unroot that'd be great too. Thanks.

EDIT 2: I know that you can use the LG Mobile Support Tool but it needs a native (apparently won't work in a VM too well) Windows install, of which I do not have at the moment. Is there a way to do it on Mac OS X 10.9?

It worked for me few moths ago when I needed to come back to 4.2.2 base to get rid of dimming bug on AOSP KitKat ROMs.
Did you wipe in TWRP cache, data, system, dalvik? All 4 of them need to be wiped/formatted. Do it in TWRP Wipe: Advanced menu.

 

[Shiggity]

It worked for me few moths ago when I needed to come back to 4.2.2 base to get rid of dimming bug on AOSP KitKat ROMs.
Did you wipe in TWRP cache, data, system, dalvik? All 4 of them need to be wiped/formatted. Do it in TWRP Wipe: Advanced menu.

Okay I'll try that, but yeah. Not having any high hopes.

---------- Post added at 07:12 PM ---------- Previous post was at 06:55 PM ----------

@ Natakranta: nope. Still only boots to TWRP.

---------- Post added at 07:37 PM ---------- Previous post was at 07:12 PM ----------

It's imminent that I have this tablet working since the person paid, and I don't know if he's tech savvy enough to flash a different ROM if I was to put an AOSP/AOKP ROM onto it....

Someone please help.

 

[Natakranta]

Okay I'll try that, but yeah. Not having any high hopes.

---------- Post added at 07:12 PM ---------- Previous post was at 06:55 PM ----------

@ Natakranta: nope. Still only boots to TWRP.

---------- Post added at 07:37 PM ---------- Previous post was at 07:12 PM ----------

It's imminent that I have this tablet working since the person paid, and I don't know if he's tech savvy enough to flash a different ROM if I was to put an AOSP/AOKP ROM onto it....

Someone please help.

Maybe there's something wrong with your recovery.
Download TWRP 2710 zip and flash it in recovery. Them reboot recovery. Try flashing stock ROM again.
Maybe it will work.