yashsingh1/xdaforums huggingface dataset:
[LG V20 Guides, News, & Discussion] Wr3ckd90:
alright guys after 11 days of searching the forums ive been unable to find a fix to my problem... My sprint v20 will not boot into a rom anytime i install a rom everything seems to install correctly untill the end when the phone then tells me that unmount of /system failed; no such volume ive looked everywhere ive found a few people having same issue with other phones but none that are v20 but i still have the fixes a go with no luck at this point im not sure if i should just concider my phone bricked and a paper weight or if there is still hope in saving the phone... ive tried installing 3 different roms the original that me2151 posted in OP and ive tried Team DevDigitel rom and ive tried the cm14.1 lineageos and the phone will only boot back into TWRP after flashing and rebooting

any help with be much appreciated
[LG V20 Guides, News, & Discussion] Builtfordtough1:
Tried to pull the batt?
[LG V20 Guides, News, & Discussion] ruthlessnature:
Pull the battery, put it back in hold power and volume down, as soon as it turns on and gets to the. Lg screen release power for a second and press and hold it again do not release volume down it will go to a reset screen . follow the reset .once your done with the factory reset flash a rom make sure you have one on your sd card. And it should boot up fine.
[LG V20 Guides, News, & Discussion] Overgloc:
Just to confirm on the ATT H910 with the latest Security Update will it still Root and Unlock? Or Am i FUBAR Since the Dec Security update? Thanks
[LG V20 Guides, News, & Discussion] Wr3ckd90:
Thank you very much this worked... I've been without a phone for the last 11 days... I already posted about the issue once and I think it was over looked or someone didn't know the answer and I didn't want to be that person that pesters everyone..
[LG V20 Guides, News, & Discussion] emdroidle:
So far no device has been found which had a problem with the December 1 security update; the dirty-COW problem wasn't fixed until December 6 or so. Won't be too long before we find devices which need new attacks to get unlocked.

For any V20 though which is not a Sprint device, we know where KDZ files from before the update are and LGUP has yet again been successful at loading earlier versions (for Sprint no KDZ files have been found).

EDIT: As per [MENTION=4591212]me2151[/MENTION] add AT&T to that list. Unlocked phones for the win.
[LG V20 Guides, News, & Discussion] ruthlessnature:
No problem enjoy.
[LG V20 Guides, News, & Discussion] repsol_23:
edit: sorry, wrong thread!!!
[LG V20 Guides, News, & Discussion] SketchyStunts:
Reason #231 I hate Sprint
[LG V20 Guides, News, & Discussion] me2151:
Im pretty sure AT&T is also missing its KDZ.
[LG V20 Guides, News, & Discussion] Raxsymelich:
Where'd you get that ROM? Where are people finding these ROMs that aren't listed anywhere on XDA or even a Google search? Critical lack of ROM for the LS997 so far, and the ones that ARE listed on XDA are for all variants, and are never tuned for performance or battery life or anything...mostly just for music quality or something.

Any Devs want to take up the challenge of making a *PERFORMANCE* ROM/kernel, for the LS997?

Get rid of all bloatware (from LG and Sprint),

Best battery life and fastest charging,

Best CPU/RAM performance,

Best SD card handling,

Best cell tower signal handling and WiFi handling,

Fastest loading everything...

I know all this stuff exists, I see one in a ROM here, a different one in a different ROM over there...

Someone put it all together in a single ROM + kernel package, would be awesome.
[LG V20 Guides, News, & Discussion] ruthlessnature:
https://xdaforums.com/v20/development/rom-ls997-stock-debloated-su-goodies-t3531923 there are multiple versions in this thread all for the sprint version some debloated and some medium debloat and some no debloat.
[LG V20 Guides, News, & Discussion] Overgloc:
Hmm i saw from earlier post that people with the latest ATT update were having trouble thats why i ask to confirm. Thanks for the reply gonna look further into this just to make sure.
[LG V20 Guides, News, & Discussion] emdroidle:
Alas, a rather big problem with TWRP. Trying to get this fixed is high on my to do list.

"Werewolf" is here. While this kernel may be handy as a short-term fix, I must very strongly recommend moving onto some other kernel which works for you as soon as one becomes available. While "USA-RedDragon" may have some knowledge of kernel building s/he pretty clearly does not understand revision control systems and is putting some rather crappy patches into his/her kernels.

I stand corrected. I wasn't able to locate an AT&T KDZ file.

Anything December 1 or earlier should be okay. New phones will be starting to have trouble now.
[LG V20 Guides, News, & Discussion] mayankjet:
There is actually debug bootloader on LG spirit LTE , which is unlocked by default but no one knows how to access it
[LG V20 Guides, News, & Discussion] me2151:
Apparently not. if its disabled then its useless.
[LG V20 Guides, News, & Discussion] mayankjet:
No its not locked but no one knows how to access it
[LG V20 Guides, News, & Discussion] me2151:
If it was unlocked then it wouldnt enforce boot.img signitures. I can confirm it does enforce sig checking. because I would not have bricked if it was unlocked. Please stop false accusations unless you can back it up with proof. I have done research and Fastboot is disabled on the sprint aboot(bootloader). The only way to fix would be to rebuild the aboot source which we do not have. You are a new user and frankly you just pissed me off. Where is your proof? I have disected the stock bootloader and there is no way to access it. . I want to see your proof please.
[LG V20 Guides, News, & Discussion] elliwigy:
really? why post to say someones work is crappy? at least usa reddragon is contributing and currently one of the only ones with static boot fixed in their kernel...

the post i quoted has no new or relevant information at all that hasnt already been discussed and the comment about reddragon putting crappy patches and telling ppl to move on as soon as they can isnt a nice thing to say
[LG V20 Guides, News, & Discussion] elliwigy:
bro i could care less about the technical details.. fact is youre being rude about someone elses work.

I did not ask for specifics at all.. i said you were being rude and criticizing someone else without putting out any work of your own..

the community isnt for talking down on eachothers work.. how would you like it if you put something out and others said it was garbage?
[LG V20 Guides, News, & Discussion] SketchyStunts:
I for one, appreciate his opinion.
[LG V20 Guides, News, & Discussion] elliwigy:
well opinions are good.. it was more his choice of words that was abit rude... many ppl are using 1.0 including myself and its been great
[LG V20 Guides, News, & Discussion] pbedard:
I decided I do in fact want to root can is any will to or do it for me I'll donate to h
[LG V20 Guides, News, & Discussion] twistedvip:
Quite honestly, if youre unable to follow the directions that have been posted on the front, it would be best to stay away from rooting your phone. It opens up a greater possibility of messing up your phone and you wont always have someone here be able to help you restore if/when something does go wrong.
[LG V20 Guides, News, & Discussion] pbedard:
I know how to root phone's just not this one
[LG V20 Guides, News, & Discussion] Raxsymelich:
I'm waiting for a Rom/Kernel combo that's specific to Sprint LS997 and is built around stable performance rather than music or themes.

No disrespect to any devs, but this has been my irk for years with Rom/Kernel development. There always seems to be a lot of things that don't really matter thrown in, rather than focusing on streamlined code. The old Anthrax kernel for the EVO3D was an exception, but there were a lot of other problems going on around that (that had nothing to do with whether it was a good kernel, mind you).

And I should point out that I'm entirely hypocritical and whiny: I don't always streamline my code, or even follow ANSI standards, heh. And I'm too lazy to write kernels/roms myself, so I just whine for others to do it to my specs, lol.

So, feel free to ignore my punkass. ;)
[LG V20 Guides, News, & Discussion] ghostknyght:
I just pulled my replacement ls997 out of its box. Shortcutmaster lite will not open that hidden menu. The error it gives ends with "su: not found"

It appears that to open these menus requires root. Is this correct?

---------- Post added at 03:22 AM ---------- Previous post was at 03:20 AM ----------

People don't like sprint's service, hence no devs have sprint. It's felt like the short end of the sitck for a while hahahaha.
[LG V20 Guides, News, & Discussion] bikermites:
No one is talking about unlocking the device
[LG V20 Guides, News, & Discussion] wotlos:
Yes you need root.
[LG V20 Guides, News, & Discussion] comp101inc:
bootlooping to lg screen

followed directions to the t and still bootlooping at lg screen not in twrp yet either i have fastbboot and adb. Help? 2nd sprint v20 done and this one does this lol
[LG V20 Guides, News, & Discussion] midmadn:
Try this - if you haven't.

Have you tried power on and volume down to go through the factory reset screens.

A bunch of us had this problem and it was because an update downloaded on it's own and the bootloader snoops it out and forces recovery to boot.

Just do the volume down + power button - as soon as you see the lg logo release power only then immediately re-press power and continue holding power and volume down until the factory reset screen pops up. Select yes and yes, (don't worry - if you have twrp recovery it can't reset). It will boot you into TWRP and I'm pretty sure it will delete the update files in fota folder.

In TWRP select reboot - system and it should boot normally like nothing happened.
[LG V20 Guides, News, & Discussion] TheMayor5152:
Suggestion

First off, thank you! Just a suggestion, I think it would benefit some to add a step at the beginning of this whole process. Stating that you need to load the superSU.zip to a SDcard, maybe go through the steps of flashing the superSU.zip. I somehow did not see the step stating to flash it and it also gave the secure login screen and I'm 100% certain I wiped everything correctly. Besides that hiccup everything went smoothly. Thanks again.
[LG V20 Guides, News, & Discussion] lennybronx:
Out of curiosity, is there a simpler method being worked on? I can't begin to imagine the amount of work it must have taken just to create this method. However I have always been under the impression that the develops here at XDA do the work they do for the greater good of the larger audience. The people such as myself who couldn't code if life depended on it. Just reading the instructions is daunting. If there is a simpler method being worked on then I would greatly appreciate it if someone could let me know
[LG V20 Guides, News, & Discussion] TheMayor5152:
He does state that a one step method is being worked on but it might not be ready for a little while.
[LG V20 Guides, News, & Discussion] cwis:
I'm on the ATT version. I am thinking of rooting, as I have done in the past with a lot of Nexus phones. This by far is the "scariest" root method to me because there's no going back to stock if I need warranty service.

Is there anyone here that has successfully rooted on ATT version? Any advice?
[LG V20 Guides, News, & Discussion] Uamore6:
I've been trying to root att version and keep getting stuck at 2nd step. I believe they told me they fixed the patch and I'm screwed till another patch is found. In monitoring this post till then.
[LG V20 Guides, News, & Discussion] tooandrew:
[MENTION=4591212]me2151[/MENTION] So I'm guessing you were unsuccessful in that endeavor? I hope you haven't bricked your phone again! Appreciate all your hard work, friend.
[LG V20 Guides, News, & Discussion] cwis:
So your phone is bricked completely or it rebooted like nothing happened?
[LG V20 Guides, News, & Discussion] USA-RedDragon:
[MENTION=6984210]emdroidle[/MENTION] Hey man, I'm sorry for getting pretty pissy on GIthub, but I realized I don't wanna be THAT a**hole who can't stand criticism, I'd like your opinions on some things, if you'd forgive my inability to cope with criticism, could you PM me?
[LG V20 Guides, News, & Discussion] emdroidle:
I was going to ask someone who was running with the debug kernel whether they could get a copy of /proc/config.gz, which was the kernel configuration and would tell us how the working kernel was configured...

I hadn't realized that feature had evolved into "IKCONFIG", turns out distributed with the Linux kernel is `scripts/extract-ikconfig` which can extract a copy of the .config if CONFIG_IKCONFIG=y was set (and /proc/config.gz depends upon this). So it is possible to get the debug kernel configuration without needing to install it. Apparently the official name for the original device was "elsa_nao_us". (`make elsa_nao_us_defconfig` to recreate something which should be pretty near identical)
[LG V20 Guides, News, & Discussion] planetbeen:
I was under the impression that it was only the sprint version that can't go back to stock. Don't quote me on that but search around some and see if I'm right.

I'll look around to see if I can figure out where I got that idea from and post a link if I find confirmation.

Most likely someone will correct the heck out of me if I'm in the wrong.

:)

Im on T-Mobile so my info on this is just from reading everything everywhere all the time so there's a chance I may have mixed something up in the process of all this reading!

*edit*

Quick search... First thread states there's no going back to stock.

Second post has an update says that some can go back to stock if there is a kdz available.

So... Definitely be sure to read that second post completely and see what applies! :)

*second edit * so far I don't see a mention of anyone having a kdz for att yet if I'm correct about it being the 910.

:(
[LG V20 Guides, News, & Discussion] TheShadow1:
I just wanted to say thank you for this great root method, and I also wanted to thank you for this post as I was stuck in a TWRP loop for hours and couldn't figure out what I did wrong, this fixed it. Thank you :)
[LG V20 Guides, News, & Discussion] johnronin:
I finished everything but it shows no root access with root checker.. Did all the steps running twrp but apparently not root :/
[LG V20 Guides, News, & Discussion] twistedvip:
Try flashing supersu in twrp again.

Also, no there is no att KDZ at this current time.
[LG V20 Guides, News, & Discussion] me2151:
I am not bricked. Currently I am building a "One click root" method to simplify everything.

It is impossible to pull the IKCONFIG. It gives an error(one of the first things I tired).
[LG V20 Guides, News, & Discussion] emdroidle:
This seems to be an example of different people having different skill sets and thus taking different routes. boot1.img is an Android boot image, many tools are available, such as this one. Then `file boot1.img-zImage` => "boot1.img-zImage: LZ4 compressed data (v0.1-v0.9)", so then `lz4 -d < boot1.img-zImage > Image`, and finally `scripts/extract-ikconfig Image > Image.config`.

Thus showing that given enough people, nearly any problem is shallow.

There are 3 firmware areas changed with DirtySanta. "aboot" (Android boot loader), "boot" (the kernel), and "recovery" (recovery area, overwritten with TWRP). Nominally restoring simply involves reverting all 3 areas. This shouldn't be too difficult, but there is an issue that DirtySanta only backs up 2 of these 3. On rooted devices it may still be possible to retrieve a copy of recovery from "recoverybak", /dev/block/sde3; at which point simply overwrite the 3 from the backups and the device should be indistinguishable from a never rooted device.
[LG V20 Guides, News, & Discussion] me2151:
Did you actually attempt what you wrote? Because thats what i did. extract-ikconfig gave me an error every time.

As for your return to stock method shown above. That was my original method that bricked me.

EDIT: also for DirtySanta to only backup 2 of the 3. DirtySanta only has access to the aboot and boot.img blocks. No recovery access so its unable to back it up.
[LG V20 Guides, News, & Discussion] emdroidle:
Yes, worked just fine with both the boot1.img and boot2.img files (which hopefully is indeed the debug kernel, right?). I'm using extract-ikconfig from a 3.18.31 kernel.

Interesting. Then this could be a difference of the H990DS, on the H990DS atd does have permissions for reading /dev/block/sde2.
[LG V20 Guides, News, & Discussion] xxxrichievxxx:
Are you stuck on Step 2 because of the update that was released in December? I was going to go ahead and try this but if you're stuck on step 2 because of the update AT&T released in December, I'll wait till it's 'rootable'
[LG V20 Guides, News, & Discussion] KedarWolf:
Downgrade to the 10d firmware, then root. Download the older firmware, then follow the steps found here.

https://xdaforums.com/v20/how-to/v20-kdz-restore-failing-9-completing-fix-t3546817
[LG V20 Guides, News, & Discussion] ke.x:
Guys, is it me or there are steps missing for F800L in the original step by step guide?
[LG V20 Guides, News, & Discussion] xxxrichievxxx:
Which version would AT&T H910 use? I don't see H910 as an option on that list.

Thank you! :)
[LG V20 Guides, News, & Discussion] ixcknyxi:
Help with RUNMEFIRST.bat, nothing happens after applypatch

Hi, been out of the scene for a while, thanks for your patience and help. (verizon lg v20 VS995 running 12a)

after I type ID into Terminal Emulator and get Untrusted (see picture)

I get this on the RUNMEFIRST.bat command:

It just keeps waiting with the three lines saying:

------- beginning of system

------- beginning of main

------- beginning of crash

any help would be much appreciated!!
[LG V20 Guides, News, & Discussion] KedarWolf:
I've searched, can't find H910 firmware anywhere. :(

Edit: Try this, make sure USB Debugging is enabled. Turn off phone. Remove the battery. Put battery back in. Hold the volume up button and plug in USB cable. It may boot into download mode or it may boot into the dirty santa corrupt screen. If it does boot into the corrupt screen , let go of up button, press the power button then IMMEDIATELY press the volume up button. Either way you should be in download mode. You want download mode, not fastboot. Make sure LGMobileDriver_WHQL_Ver_4.1.1.exe drivers are installed.

Download LG Support Tool. http://www.mylgphones.com/lg-software-tools-download the 'Download and install LGMobileSupportTool.exe' link. Install and run it. If you've already installed the drivers hit cancel when they go to install.

Then go to 'Options' 'Upgrade Recovery' Make sure you have the IMEI number from under the battery and put it in no dashes or spaces. It should download and install the firmware if you've done the tap 'About Phone' 'Developer Options' 'Enable USB Debugging' but I'm sure you know this.

If all goes well you should be back on stock firmware.

Added zip file to LG Support Tool as an attachment. :)

Hope it works, it should but I'm not 100% sure.
[LG V20 Guides, News, & Discussion] me2151:
No missing steps. Follow it like the verizon ones.
[LG V20 Guides, News, & Discussion] me2151:
Thats because there is no download for the H910 KDZ.
[LG V20 Guides, News, & Discussion] cwis:
So does KedarWolf's post mean that I can actually have a phone ready in case I need warranty service? I'm confused. Also, is this for the att version?
[LG V20 Guides, News, & Discussion] elliwigy:
not sure i understand your post.. do you have a 910? If so then there is no kdz for you guys yet so once you root your stuck for now unless there is a kdz somewhere..

his steps were simply to try and pull a firmware file if its available from what im reading but he clearly says theres no kdz available in his very first sentence
[LG V20 Guides, News, & Discussion] KedarWolf:
Should work to completely flash back to stock but I know someone had an issue after dirty cow where phone wouldn't finish flashing and without a KDZ they would have likely been bricked. :(
[LG V20 Guides, News, & Discussion] jmahaffey:
Has anyone else on ATT had issues with TWRP not installing. It seems like everything goes well until TWRP goes to install and gives a message saying it couldn't flash.
[LG V20 Guides, News, & Discussion] me2151:
Do you have twrp in the proper folder? is it the proper name?
[LG V20 Guides, News, & Discussion] esqueue:
Instead of staying away like people are quick to say, just read around on how to install ADB and Fastboot. The written directions are for those that fully understand what they are and how to use them.
[LG V20 Guides, News, & Discussion] midmadn:
Where are you located?
[LG V20 Guides, News, & Discussion] esqueue:
In Long Beach, California, USA. Why?
[LG V20 Guides, News, & Discussion] awareunlikeu:
Agreed! I learned more the hard way through command line forcing myself through it yet still being very precise and have brought many a piece of tech literally back from the dead just trying things nobody else has and 99.999 percent of the time always prospered. It made me much smarter and well equipped to deal with any kind of exploratory exploiting, or should that exploratory exploiting go wrong. That even goes for my current predicament of the 700 dollar Google pixel XL I have right now that is a literal paperweight because the guy I sold it to tried updating to 7.1.1 with unlocked bootloader and a few hacked apps still installed that I thought I had uninstalled manually and since it's working with that dual boot partition I am completely locked out of everything other than fastboot and cannot access the stock recovery and use adb sideload or TWRP. So I am quite frankly SOL on the device but see I wouldn't know for 100% sure that I'm this screwed unless I had done the legwork with every other device I've worked with the hard way. It will take one of the XDA gods such as beaups or a Jcase level Dev to even begin to help me with this issue unfortunately. But with all my experience and knowledge at least I know exactly what's wrong with it.. so anyway the point I'm arriving at is, it's well worth it to go ahead and just take the plunge if this type of thing interest you, and you REALLY enjoy and are passionate about having 100% control over the devices you bye. Just my 2 cents.
[LG V20 Guides, News, & Discussion] Lumince:
So i have a big problem! I tried to uninstall this damn audible system app and a few others and in doing so my phone crashed... Like a full on reboot. After it boots its suuuuper laggy for about 5-10 minutes... I forgot to backup a clean system.img so im kind of screwed with this one... It crashes atleast once a day now :/

If anyone has a clean system.img I could flash that would be awesome! If not ill figure something out i suppose.
[LG V20 Guides, News, & Discussion] AthieN:
Just download your ROM of choice, reboot to recovery and flash it using the provided instructions from the thread you got it from. No need to mess with .img files... And next time, exercise caution when removing system apps. :)
[LG V20 Guides, News, & Discussion] Lumince:
Yea... I seem to be losing my grip on rooting and things of the sort. I knew i should have backed up my phone before hand! All well, looks like weta VS995 it is xD
[LG V20 Guides, News, & Discussion] AthieN:
It happens. These LG devices are definitely a different breed of animal compared to most others out there, but the underlying OS is still the same. Just keep that in mind and always remember to back up before making major changes... Good luck!
[LG V20 Guides, News, & Discussion] midmadn:
You never know. You could have been close and you could've come over to do it.

Not the case by about 3500 miles.