Stock flash and relock problem (lg up + upercut) - LG G6 Questions and Answers

Hi
I had unlocked my lg g6 bootloader, and installed custom rom.
After few months with custom rom, I want to get back to the stock lg rom, with dual camera and L1 widevine.
So I tried to install the stock rom and relock bootloader:
Using LG up , downloaded .kdz file, and upercut, I get each time dll problem. The LG up version does not match with the phone version. I tried to place or replace some dll files found online in LGUP/common/LGUP_Common.dll
Nothing happens, I still have this issue.
Then, I tried with LG bridge (update - repair update).
It worked, I installed the stock rom. I still had the bootloader unlocked.
I locked the bootloader with adb and fastboot, and did factory reset.
So why I am posting this message ?
Because now, with the stock rom installed by LG bridge, I have L3 widevine and not L1. And the camera application (and all apps using the camera) does not work.
I think, I need to rewrite properly the original rom with LG up, but I don't know how to make it work properly. I used one time LG up by the past when I soft bricked my phone, and I did not get any dll issues.
Now, I am trying to do it, and nothing works. I tried 2 computers (1 windows, 1 linux+Windows VM) nothing.
kdz problem, dll problem, computer problem ? I don't know...
I really wish someone could help me
Thanks, very much.

If you are coming from Custom ROM to Stock, you need to flash Nougat first. If you dont your camera wont work.

I think that like my old LG L9 the G6 has a PROM/fuse bit which remembers if the bootloader had been unlocked once. This could explain the Widevine issue. Samsung introduced Knox years ago, which also won't ever forget unlocking and prevent further use of certain Samsung applications.

lecorbusier said:
I think that like my old LG L9 the G6 has a PROM/fuse bit which remembers if the bootloader had been unlocked once. This could explain the Widevine issue. Samsung introduced Knox years ago, which also won't ever forget unlocking and prevent further use of certain Samsung applications.
Click to expand...
Click to collapse
Thanks for this response

coco74x said:
Thanks for this response
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Click to collapse
Did you solve?
Cause I did almost same things as you: wanted to go back to stock after experiencing some random reboots with lots of custom roms (which worked till few months ago) and so flashed back the original Pie (H87030b_00_OPEN_EU_OP_1105.kdz) via LGUP but ended up with camera and flash not working at all.
While on custom rom everything works smooth, a part from random reboots
Right now I'm flashing H87011i_00_OPEN_EU_OP_0108.kdz (Nougat) but I'm not sure if it will solve the problem.
Thanks in advance
EDIT: camera is working on Nougat, butnow I have to deal with that damn "moisture" notification
EDIT2: after almost a full day of updates I can use my LG G6 with stock rom, stock camera and be very happy with it ;-) thanks @SkylineDiT for the tip of going back to Nougat, didn't know it.

Related

lg g2 d80220d?

hey,
So I have the lg g2 d802 model bought it in the netherlands
and ever since the upgrade to kitkat I've been looking for a way to fix the audio hiss...
Now suddenly everywhere there is talk of a new software version?
now I tried updating it ota, but it doesn't find any updates for me..
I also tried the lg support tool and updated it even though it said I had the latest version (d80220b)
does anyone know how I can install this
my device isn't rooted but has a little bug on it since I tried to root it...
it makes it so I get some secure boot error when resetting my device...
can anyone help me fix this annoying hissing bug or get the d80220d update??
ipsmaxes said:
hey,
So I have the lg g2 d802 model bought it in the netherlands
and ever since the upgrade to kitkat I've been looking for a way to fix the audio hiss...
Now suddenly everywhere there is talk of a new software version?
now I tried updating it ota, but it doesn't find any updates for me..
I also tried the lg support tool and updated it even though it said I had the latest version (d80220b)
does anyone know how I can install this
my device isn't rooted but has a little bug on it since I tried to root it...
it makes it so I get some secure boot error when resetting my device...
can anyone help me fix this annoying hissing bug or get the d80220d update??
Click to expand...
Click to collapse
Just flash the 20d kdz
LenAsh said:
Just flash the 20d kdz
Click to expand...
Click to collapse
anything else I have to make sure?
won't the secure boot error cause any troubles?
I really want to play it safe as for each time I tried something like this (flashing bios on pc,attempting root etc)
something bad happened and I luckily managed to fix it in both cases
ipsmaxes said:
anything else I have to make sure?
won't the secure boot error cause any troubles?
I really want to play it safe as for each time I tried something like this (flashing bios on pc,attempting root etc)
something bad happened and I luckily managed to fix it in both cases
Click to expand...
Click to collapse
Do a full factory reset on the phone first. Then flash using this method: http://forum.xda-developers.com/showthread.php?t=2432476
If you don't have a copy of the EUR kdz:
https://drive.google.com/file/d/0B_ESvfVtZzEwc0JfazU1UzlKd28/edit?usp=sharing
I'm downloading these files now..
will this update also come available ota in belgium?
because right now I'm really hesitant if I want to do something 'dangerous' like flashing stuff again.
edit: also is it normal that when I attempted root rootchecker told me I was rooted, but now
a month later I check again and it tells me I am not rooted
ipsmaxes said:
I'm downloading these files now..
will this update also come available ota in belgium?
because right now I'm really hesitant if I want to do something 'dangerous' like flashing stuff again.
edit: also is it normal that when I attempted root rootchecker told me I was rooted, but now
a month later I check again and it tells me I am not rooted
Click to expand...
Click to collapse
Just factory reset (on the phone) and then flash...

LG G2 display problem after going back to stock

a few feeks ago bought a second hand lg g2 d802 running kitkat 4.4.2 wich was only detecting 2g when i try to connect to the internet, i tried to solve this problem by entering the hidden menu and selecting the network types it could detect but no luck, so i decided to upgrade to lollipop, i downloaded the lg support tool and went for it, when the update was done i found myself with an almost completly functioning device except it had the "imei=null" problem, meaning no network at all --"
i tried the QPST but it was unable to detect my phone, so i decided to root my phone and go for a custom rom, the cyanogenmod13 nightly (i don't really know what i was thinking at that point :s ) and when done i was stuck in a bootloop, so i tried flashing a stock rom kdz method but the lg flash tool would stop automatically. since then i've been trying to flash stock TOT roms, the process would stop at 94% and the phone reboots. the screen shows random pixels and lines, the start up lg tune is there and i feel vibration when i press the home buttons location, i've tried to reset it to factory settings and i've used theLGUP_8974.dll, selecting the BOARD DL option in the lg flash tool but that didn't solve the problem. i have read somwhere that it could be a kernal problem, i don't know if i should go that way ( am at that point where i don't want to mess up my device anymore xD ) what do you guys think?
thank you for your help
restlessone said:
a few feeks ago bought a second hand lg g2 d802 running kitkat 4.4.2 wich was only detecting 2g when i try to connect to the internet, i tried to solve this problem by entering the hidden menu and selecting the network types it could detect but no luck, so i decided to upgrade to lollipop, i downloaded the lg support tool and went for it, when the update was done i found myself with an almost completly functioning device except it had the "imei=null" problem, meaning no network at all --"
i tried the QPST but it was unable to detect my phone, so i decided to root my phone and go for a custom rom, the cyanogenmod13 nightly (i don't really know what i was thinking at that point :s ) and when done i was stuck in a bootloop, so i tried flashing a stock rom kdz method but the lg flash tool would stop automatically. since then i've been trying to flash stock TOT roms, the process would stop at 94% and the phone reboots. the screen shows random pixels and lines, the start up lg tune is there and i feel vibration when i press the home buttons location, i've tried to reset it to factory settings and i've used theLGUP_8974.dll, selecting the BOARD DL option in the lg flash tool but that didn't solve the problem. i have read somwhere that it could be a kernal problem, i don't know if i should go that way ( am at that point where i don't want to mess up my device anymore xD ) what do you guys think?
thank you for your help
Click to expand...
Click to collapse
Sounds like to me you may not have a D802. You'll need to take the back cover off, and look and see what model #s you see. As if your having screen issues that sounds like your flashing a D802 firmware on a D800 or D801.
Also remember flashing will almost always stop before 99%.. Anything after 85% its done this is normal and will almost always happen.
These D802's have a LONG history (mostly bought referbs) of not being what they are being sold as.
hyelton said:
Sounds like to me you may not have a D802. You'll need to take the back cover off, and look and see what model #s you see. As if your having screen issues that sounds like your flashing a D802 firmware on a D800 or D801.
Also remember flashing will almost always stop before 99%.. Anything after 85% its done this is normal and will almost always happen.
These D802's have a LONG history (mostly bought referbs) of not being what they are being sold as.
Click to expand...
Click to collapse
the problem has been solved, it tuned out to be an ls980, now my G2 is fully back to life :laugh: thanx alot hyelton for your help :good:

[G6 H870] Unable to update through KDZ

Hi. I have a problem. I'm on a V20C Oreo. When i am trying to update to something newer (by LG flashtool or by official tools like LG Bridge) phone freezes on LG G6 ThinQ screen, nothing helps (factory reset too). Then i must go manually to download mode and flash V20C back, and it boots OK. What is wrong?
Later than one month ago i have problem with charging, the cable was charging only on one side and it newer go to fast charge mode, then i made a factory reset and problem dissaperes for a couple of hours, after flash to V20C (i can't flash newer soft) its ok for a few weeks.
What could be the problem? Please help.
Nobody will help you, coz this G6 forum is the worst smartphone forum ive ever seen.
i hope not Is there any other LG forum where I can get help?
chappski said:
Hi. I have a problem. I'm on a V20C Oreo. When i am trying to update to something newer [...]
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Click to collapse
Isn't V20C the most recent stock? If you want to downgrade you will have to unlock bootloader, but I guess it's not what you have problem with. Try to use LG UP with UPPERCUT, other tools probably won't work.
matthew33 said:
Nobody will help you, coz this G6 forum is the worst smartphone forum ive ever seen.
Click to expand...
Click to collapse
You are working hard to prove it, aren't you? If you have nothing smart to say just stay quiet.
No. I just want to update the phone. LG Bridge want to update to V20F but after update phone freezes.
chappski said:
No. I just want to update the phone. LG Bridge want to update to V20F but after update phone freezes.
Click to expand...
Click to collapse
uhmm that's weird i wouldn t recommend updating right now .wait till u see what other people are experiencing
chappski said:
Hi. I have a problem. I'm on a V20C Oreo. When i am trying to update to something newer (by LG flashtool or by official tools like LG Bridge) phone freezes on LG G6 ThinQ screen, nothing helps (factory reset too). Then i must go manually to download mode and flash V20C back, and it boots OK. What is wrong?
Later than one month ago i have problem with charging, the cable was charging only on one side and it newer go to fast charge mode, then i made a factory reset and problem dissaperes for a couple of hours, after flash to V20C (i can't flash newer soft) its ok for a few weeks.
What could be the problem? Please help.
Click to expand...
Click to collapse
For my h870 lg bridge doesn't show any updates?For what region is your phone?
Phone is from Poland, not brannded.

trying to understand between root bootloader and flashing rom

my first g6 had a broken screen last week. me being abusive to it. from frustration.
bought a used g6 as a backup very quickly but im not liking v9.0
id like to install the first 7.0 version it ever had available H870. I have 3 apps total installed more of a pro privacy advocate so no browser and would like to shut those annoying update popups which are extremely intrusive and come at the worst times. would like to block as much as possible to also have battery life
I dont understand what the roo does, what the bootloader does and I understand I need to flash a kdz rom. if I understand, I need to install 7.0 (not 7.1 or later) then use the root and bootloader to block updates notifications and to remove default apps in the phone.. basically tweak system things...is this correct?
I used to tinker with windows mobile back in the days but after years of fear of bricking and only have one phone, I had to suffer through annoyances in the OS they give. it is time to have a phone that doesnt annoy me and isnt intrusive. I really do need calmness after 18 months of hell with covid.
inevitably I will move to pinephone once it gets mature. for now using this g6. I dont run after the newest models.
any insight or experiences or tips you could throw at me would be appreciated as I think i may be mixing things up
stay afe
i have a used H870 here. Did the root+twrp, up to PIE and tryed/flashed many things, but wasn´t that happy at all. That was a few month ago. A week ago I replaced my battery and tada, sweet runner. So again I wanted more and bricked it to "no sim" after restoring from a kernel here. Since there isnt much for Pie, roms, deadlinks, broken twrp etc. the only tool which worked and helped me was LG bridge to restore to latest stock pie.
I would recommend u to root without recovery via magisk/fastboot method and go for some adaway, acc battery charger, lsposed + gravity, debloat and maybe a kernel manager + etc.
dont forget, when u have sporadic lags, go for the battery.
gl on ur way mate
----
ps just for info
the only working usb drivers where delivered via the LG bridge tool driver update for me, i tryed many..

Trouble flashing stock kdz

I have an H872 on Havoc 4.4. I have upgraded to a Pixel and will be giving the H872 to my father-in-law. He will only be using it for phone calls - very unlikely he will text, and definitely won't use data. It will also be his first smart phone. Since the H872 is rooted, when it boots up it gives the warning display that the phone may be "Corrupted". I don't want to have to explain all that "root" stuff to him, etc... I want the phone as basic and simple as can be, hence , I want to reflash the stock firmware.
I am having troubles though. Booting the phone into download mode and starting LGUP fails to recognize the phone. I've tried with Uppercut as well and it says I'm missing a file in Apps/Roaming, etc...
Not sure the problem because I have reflashed stock many times with LGUP. Could it be that Havoc has changed the "identity" of the phone, or that it's on Android 11?
Any help to get this back to stock is much appreciated!
Got it figured out. Flashed back to an older TWRP (was on Orange Fox), flashed an old stock Oreo ROM, and then was able to flash kdz with LGUP.

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