[ROM][v521] LG Stock Nougat ROMs for LG G Pad X 8.0 (2018-06-18)

[.fenrir]

Disclaimer:
I am not responsible for anything that may happen to your phone as a result of installing this rom. You do so at your own risk and take responsibility upon yourself.


About:
The Stock ROMs posted here are extracted from official LG KDZ files for the T-Mobile LG G Pad X 8.0 | v521 | b3.

Only change made on ROM was to prevent stock recovery from restoring itself

ROM includes modem/radio, however you can also manually flash the modem/radio from here

root is NOT included. However feel free to flash your choice of root with Magisk, SuperSU, or any others at anytime to get root.


Info:

• Android version: 7.0
• Kernel version: 3.10.84
• Build number: NRD90U
• init.d support
• forceencrypt disabled

Requirements:
Your device must be or have been on 20f or newer at one point or another. If your device has always been on Marshmallow and has never been updated to Nougat by kdz or OTA, you'll need to upgrade to Nougat and re-root first. (Thank to monkeyass408 for verifying)
You can follow this guide to do so: Guide to Update V521 LG GPAD X 8.0 to 7.0 and Root

You must have TWRP or another custom recovery already installed in order to flash this rom.


Instructions:

1. Download the version of your choice from below.
2. Boot into TWRP and make a backup. You may want to remove any lock screen security before doing this as restoring with lock screen may cause unexpected issues.
3. Optional: Wipe data and/or system. As of TWRP 3.1.1.0, you will want to reboot recovery after wiping data/system before flashing as TWRP may get stuck on a black screen during the flashing process without a reboot.
4. Flash ROM.
5. Optional: Flash the disable OTA zip to prevent and disable official LG OTA updates & notifications
6. Reboot and you should be all set.

Downloads: (Listed by Sofware version / Android security patch level)
Note: As of 2017-02-21, TWRP 3.0.2-0, will sometimes give the error "Failed to map file" when attempting to flash this rom. Rebooting TWRP will resolve it and allow you to flash the zip.

v52120n >> Apr 1, 2018

v52120m >> Feb 1, 2018

v52120l >> Dec 1, 2017

v52120k >> Oct 1, 2017

v52120j >> Aug 1, 2017

v52120i >> Jun 1, 2017

v52120h >> Apr 1, 2017

v52120g >> Feb 1, 2017

v52120f >> Dec 1, 2016

All Stock ROMs Folder

Disable Stock OTA
Note: This should prevent you from verifying and updating via OTA. The OTA notification may still pop up but it should go away when you attempt to update after flashing this. I haven't fully tested this so backup first and don't be surprised if it returns you to full stock.


Credits/Thanks:
tungkick for the initial root method
shabbypenguin for TWRP on the LG G Pad X
All other devs who make rom building possible

 

[.fenrir]

Reserved - Unlikely I'll need it but who knows?

 

[channeledbymodem]

Can this be flashed over marshmallow 10c? If so, what should be wiped? Thanks.

 

[.fenrir]

Can this be flashed over marshmallow 10c? If so, what should be wiped? Thanks.

Yes you can flash this over Marshmallow v52110c. Technically a dirty flash (no wipe) would work fine but you never know so don't be surprised if issues spring up. After you flash the rom, since you're upgrading from Marshmallow, you'll want to update the radios too. The flashable zips for it can be found @ https://forum.xda-developers.com/lg...irmware-modem-flashable-modem-zips-t-t3564590. I'd recommend flashing the respective radio of the Nougat version you end up using.

 

[supaet]

so after I flash the 20g my 5ghz wifi keeps on disconnecting, same thing after flashing the 20g modem. wiped data as well. coming from official 20f rooted with dirtycow.
my 10 other devices are fine so it's not my router. not sure if it's an issue with the 20g, never had any issue with 20f

 

[.fenrir]

so after I flash the 20g my 5ghz wifi keeps on disconnecting, same thing after flashing the 20g modem. wiped data as well. coming from official 20f rooted with dirtycow.
my 10 other devices are fine so it's not my router. not sure if it's an issue with the 20g, never had any issue with 20f

Hmmm I haven't had any issues with my 5ghz on my tablet. The roms are ripped straight out of the kdz files so any changes between 20g and 20f are strictly from LG/T-Mobile. Although I do recommend keeping the modem version and the rom version the same, I am curious, would you be able to test and see if it still happens if you downgrade the modem version to 20f while you're on the 20g rom?

 

[.fenrir]

Long overdue but added 20h, 20i, and 20j.

Decided to get rid of AROMA and root selection so any root method can be manually flashed afterwards.
Stock recovery shouldn't restore itself now. init.d support and forceencrypt is set to disabled by default since TWRP doesn't play along nicely with encrypt anyways.

 

[Amd4life]

Long overdue but added 20h, 20i, and 20j.

Decided to get rid of AROMA and root selection so any root method can be manually flashed afterwards.
Stock recovery shouldn't restore itself now. init.d support and forceencrypt is set to disabled by default since TWRP doesn't play along nicely with encrypt anyways.

Appreciate the update Thanks!!!

 

[.fenrir]

A bit quicker this time around. 20k has been added.

Appreciate the update Thanks!!!

No problem.

 

[monkeyass408]

Yes you can flash this over Marshmallow v52110c. Technically a dirty flash (no wipe) would work fine but you never know so don't be surprised if issues spring up. After you flash the rom, since you're upgrading from Marshmallow, you'll want to update the radios too. The flashable zips for it can be found @ https://forum.xda-developers.com/lg...irmware-modem-flashable-modem-zips-t-t3564590. I'd recommend flashing the respective radio of the Nougat version you end up using.

i flashed from 10c marshmallow to nougat 20k. i am having problems getting lte data to even show up. Would u happen to know how to get it working?
i did wipe and started fresh install. I also flashed the k modem and it didnt work.

 

[.fenrir]

i flashed from 10c marshmallow to nougat 20k. i am having problems getting lte data to even show up. Would u happen to know how to get it working?
i did wipe and started fresh install. I also flashed the k modem and it didnt work.

Shouldn't need to do anything for LTE to work. Does it get signal at least? I would confirm the APN settings just to make sure they aren't missing for whatever reason.

Otherwise, try another version and see if it does the same thing. Although it shouldn't be the case, it's possible that the device may need to be kdz'd to Nougat first before a Nougat ROM works without any problems. That being said, I do remember being able to manually flash Nougat on my tablet from 10c with no issues back when I was on it.

 

[monkeyass408]

Shouldn't need to do anything for LTE to work. Does it get signal at least? I would confirm the APN settings just to make sure they aren't missing for whatever reason.

Otherwise, try another version and see if it does the same thing. Although it shouldn't be the case, it's possible that the device may need to be kdz'd to Nougat first before a Nougat ROM works without any problems. That being said, I do remember being able to manually flash Nougat on my tablet from 10c with no issues back when I was on it.

I figured it out. I had to take 10c marsh to 20f nougat stock and rerooted +twrp in order for it to work. No longee had grayed out lte and apn and missing imei. Thanks for the reply.

Flashing straight 10c marsh to a nougat rom will always give me those errors. Same when tried with resurection remix.

 

[.fenrir]

I figured it out. I had to take 10c marsh to 20f nougat stock and rerooted +twrp in order for it to work. No longee had grayed out lte and apn and missing imei. Thanks for the reply.

Flashing straight 10c marsh to a nougat rom will always give me those errors. Same when tried with resurection remix.

Glad to hear it worked out for you. I stand corrected on it being flashed over Marshmallow so I've updated the first post to reflect that. Thanks for trying and verifying it.

 

[Char_Liu]

Hello,
The V52120l_00_1201.kdz is OTA, so could you please make the lastest ROM base on V52120l_00_1201.kdz

thanks in advance

 

[channeledbymodem]

@ .fenrir: I appreciate all the work you've done on this and don't really need the monthly patches. Is there a way to disable ota download and notification on a rooted tablet?

Thanks.

 

[.fenrir]

20l has been added. I also realized on the older files I accidentally called the device 8.3 instead of 8.0 in the zip so that's been corrected now.

Hello,
The V52120l_00_1201.kdz is OTA, so could you please make the lastest ROM base on V52120l_00_1201.kdz

thanks in advance

Thanks for the heads up. Been busy with the holidays so didn't have a chance to do anything.

@ .fenrir: I appreciate all the work you've done on this and don't really need the monthly patches. Is there a way to disable ota download and notification on a rooted tablet?

Thanks.

When rooted, you should be able to delete /system/etc/security/otacerts.zip which should prevent the device from verifying for the OTA. Afterwards if the OTA was already downloaded on the device, you can delete the OTA update file at /cache/update.zip . That SHOULD be enough to do it but I won't make any guarantees until I get a chance to test it as you would probably need to delete the other LGFOTA as well. I'll make a flashable zip for it later on if necessary/when I get a chance.

 

[channeledbymodem]

20l has been added. I also realized on the older files I accidentally called the device 8.3 instead of 8.0 in the zip so that's been corrected now.



Thanks for the heads up. Been busy with the holidays so didn't have a chance to do anything.



When rooted, you should be able to delete /system/etc/security/otacerts.zip which should prevent the device from verifying for the OTA. Afterwards if the OTA was already downloaded on the device, you can delete the OTA update file at /cache/update.zip . That SHOULD be enough to do it but I won't make any guarantees until I get a chance to test it as you would probably need to delete the other LGFOTA as well. I'll make a flashable zip for it later on if necessary/when I get a chance.

Thank you for the update.!

 

[Amd4life]

Appreciate the update

 

[Char_Liu]

Thx a lot

20l has been added. I also realized on the older files I accidentally called the device 8.3 instead of 8.0 in the zip so that's been corrected now.



Thanks for the heads up. Been busy with the holidays so didn't have a chance to do anything.



When rooted, you should be able to delete /system/etc/security/otacerts.zip which should prevent the device from verifying for the OTA. Afterwards if the OTA was already downloaded on the device, you can delete the OTA update file at /cache/update.zip . That SHOULD be enough to do it but I won't make any guarantees until I get a chance to test it as you would probably need to delete the other LGFOTA as well. I'll make a flashable zip for it later on if necessary/when I get a chance.

 

[channeledbymodem]

I have always had excellent battery life but after a dirty flash of v.l it is terrible. I am losing 30% overnight. Can I roll back to v.k? I am reluctant to clean flash v.l; it's a lot of work getting back to normal.