LG G3 D855 stuck in TWRP loop after LG UP treatment. - Android Q&A, Help & Troubleshooting

Long story not-so-short.
Due to upgrading to G5 I decideed to sell my G3.
I was running CM13 (one of the latest nightlies), 21C modem and TWRP 2.8.6, so it seemed like a good idea to go back to stock-ish firmware.
To do so, I installed stock ROM using this method with 21A modem.
Everything worked fine. I had a working LG ROM.
Then I had this great idea of mine to install even 'stocker' firmware with LG UP. (I couldn't do that while running CM13 - LG UP didn't recognize the phone)
And that was the moment when everything fell apart.
It took a few minutes for LGUP to 'install' the new firmware. Qhen phone finally rebooted, I got stuck in TWRP. There was no chance to boot a system.
I tried this fix and it didn't help.
I also tried to restore my nandroid backup (i made it on clean CM13) and it didn't work either.
Then, as an idiot I thought "How hard can it be?" and went crazy: wiping, formatting, trying to flash new modem (this tme 30B hybrid), boot, sytem and doing probably all the things I shouldn't do.
So the conclusion is: I have a nice gold brick with working TWRP, adb and LG's download mode, but nothing more than that.
No chance to boot to system and I guess with a pretty messed up system partition.
Also, I think there's some problem with flashing anything, as I don't see any lines while installing, just a few seconds and info about succeeded flashing.
Is there anyone who could help me?

Related

[Q] LS990 only boots into recovery

I'm using an LS990 that I've had since about when they came out. When Stumproot came out I rooted it, and I had installed the original TWRP Bump when that came out, but I've been running the rom it came with (ZV4 I believe, though I cannot check). Nothing had been unusual until today, when I put the phone in my pocket after using it for normal daily stuff, then when I later took it out it seemed to be in TWRP. I had almost never even booted into it on the G3 other than a very few times when I first installed it (I had been waiting for a CM12 that was stable enough for my liking).
No matter what I do, it seems to be stuck in recovery. I've updated to the latest TWRP (2.8.4.0) and that seemed to take just fine. However, when I try flashing a rom, it just flashes like normal, log says it's great, then....reboot takes me back into recovery. I tried the ZV4 base at first, then the ZV6 base, both with and without wiping all the appropriate partitions, but nothing seems to change. I am getting ready to try non-stock roms, but I thought I'd ask here first to see if anyone has any ideas? Any help much appreciated!
(not worried about my data, I had daily TB backups running which uploaded to Dropbox, so it's all saved, willing to wipe anything and everything)
Click "format data" under the "wipe" section this will wipe EVERYTHING so make sure you have the latest twrp then on your computer save a rom. Wipe the phone via twrp and then plug the phone it and wait for either Adb sideload or mtp. Personally I feel that mtp is the best just because you can move anything to your phone. Then just move the rom you want to the root of the sdcard (Every folder will be gone). Then flash it and hope that fixes it but if it dosent you may need to use the lg flash tool (windows) and flash the zv4 files. This will make you back on zv4 meaning restump root reflash twrp. The whole nine yards, just try the twrp thing first and if that dosen't work then do the flash tool. I am not responsible if you listen to me and your device breaks
bucketachicken said:
I'm using an LS990 that I've had since about when they came out. When Stumproot came out I rooted it, and I had installed the original TWRP Bump when that came out, but I've been running the rom it came with (ZV4 I believe, though I cannot check). Nothing had been unusual until today, when I put the phone in my pocket after using it for normal daily stuff, then when I later took it out it seemed to be in TWRP. I had almost never even booted into it on the G3 other than a very few times when I first installed it (I had been waiting for a CM12 that was stable enough for my liking).
No matter what I do, it seems to be stuck in recovery. I've updated to the latest TWRP (2.8.4.0) and that seemed to take just fine. However, when I try flashing a rom, it just flashes like normal, log says it's great, then....reboot takes me back into recovery. I tried the ZV4 base at first, then the ZV6 base, both with and without wiping all the appropriate partitions, but nothing seems to change. I am getting ready to try non-stock roms, but I thought I'd ask here first to see if anyone has any ideas? Any help much appreciated!
(not worried about my data, I had daily TB backups running which uploaded to Dropbox, so it's all saved, willing to wipe anything and everything)
Click to expand...
Click to collapse
Have you tried this?
http://forum.xda-developers.com/lg-...trying-ota-t2907508/post56061720#post56061720
Thanks, I did get it working. I have no idea how, but my data was all still there, despite wiping several times....but the recovery fix is what worked. I also got that lg flash tool setup so hopefully that will be helpful if I run into future problems. I honestly think after all that mess I may try the CM12 roms now, even if they still have some daily bugs, cause I was almost sad to see it boot back up into the LG stock rom...
Thanks again!
I honestly think after all that mess I may try the CM12 roms now, even if they still have some daily bugs, cause I was almost sad to see it boot back up into the LG stock rom...
Thanks again![/QUOTE]
Here is a cm12 rom that is almost perfic: http://forum.xda-developers.com/sprint-lg-g3/orig-development/cyanogenmod-12-beta-ls990-t2958197
It's the one I use everyday and I have seen almost no bugs

No OS Installed

Hi all. I just got my factory warranty back and I attempted to root it. Everything went as it should, until just after the install finished. Instead of rebooting normally, it now will only reboot into TWRP. Once there, when I try to flash a custom ROM (in this case, Bliss, but I don't think it matters, I get an error message that says the zip file is corrupt. Then, while still in recovery, when I tried to wipe everything except the sd card, it says mkfs.fat process ended with error. I then powered down and attempted the factory reset. I scrolled down on both screens and it did not say anything about any errors, so I assumed it took. However, it reboots right back into TWRP recovery. It also boots right to TWRP recovery when I try to boot normally. Of course, adb does not recognize the phone in any mode that I can get into (fastboot/recovery/download), so, I can't use LG Bridge to reflash the original firmware. Does anybody have any ideas for a fix? I know that this replacement phone had 6.0 on it. I thought I did everything to a t? TIA...
OK, not sure how I got there, but when I attempt to reboot from TWRP it says No OS Installed! Are you sure you want to reboot? That at least says what the problem is. Does anybody know how to fix this?
you have the latest twrp recovery? Just make sure you have 3.0 or higher and then try flashing again. And IMO the blissrom isnt worth using unless you dont mind smaller screen, no second screen, wonky Bluetooth and no camera.
AwesomeFabe said:
you have the latest twrp recovery? Just make sure you have 3.0 or higher and then try flashing again. And IMO the blissrom isnt worth using unless you dont mind smaller screen, no second screen, wonky Bluetooth and no camera.
Click to expand...
Click to collapse
Hey, I actually just fixed it. I finally was able to get back into download mode and I then used LG Bridge. Restoring now. Yeah, I actually picked it for some reason I cannot remember when I was faced with having to put in a custom rom as my option. I agree. When I had 5.1.1 everything worked after I got the bloatware out. Not going to get too fancy, I had a bit of a scare.

h850 bootloop into recovery

Help
so i just got the lg g5, used. unlocked the bootloader, flashed twrp/rooted it, and tried to install linage os, which worked pretty good but the battery draw was insane.
i then proceeded to install fulmics rom. now i'm stuck on a bootloop which starts the recoverymode everytime.
does anyone know what to do? i'm not smart enough to get behind the kdz/tot flashing whatever it is called. i didn't came to any conclusion, tried flashing the boot.img and bootloader.img, a new kernel and other roms, also the flashable original firmware through sdcard, fixed permissions, repaired the directories but it still didn't change a thing. i always land into the recovery mode.
i really hope there is someone out there who can tell me what is going on maybe
so i got it working again.
what i did? i forced myself into recovery via holding power button and then doin the click which asked me the yes, yes again.. and all of sudden it works like nothing happened lol. had to reinstall the rom though
Anymore info on this and what you did exactly to come out of the "recovery bootloop" as I also have the same issue and suspect others may also run into this
What I did to get recovery loop:
ReRoot and flashed latest TWRP
Flashed Nougat Firmware via TWRP
Flashed Fulmics1
Reboot and then recovery loops
-
FYI for anyone else having this issue
Looking at other threads and noticed mention of this command a few times
dd if=/dev/zero of=/dev/block/platform/624000.ufshc/by-name/misc
dd if=/dev/zero of=/dev/block/platform/624000.ufshc/by-name/fota
the path on my G5 (H850) was instead /dev/block/platform/SOC/624000.ufshc and once run corrupted the device
Guess I'll reflash KDZ and try again.
This worked for me
Cuerex said:
so i got it working again.
what i did? i forced myself into recovery via holding power button and then doin the click which asked me the yes, yes again.. and all of sudden it works like nothing happened lol. had to reinstall the rom though
Click to expand...
Click to collapse
I just wanted to draw attention to this thread, because I searched for a bit and there seems to be dangerous advice (dd zero) out there and flashing. This trick worked for me right away. Thanks.
Running H850, might also work for other people stuck in TWRP bootloop with other models.

Req: Help with Stubborn V30 (trying to get Nougat installed with TWRP)

I'm sure the fault is mine, but I'm not sure where the issue is. Google and XDA forums searches aren't helping me much either. I really appreciate all the help so far, but I'm going in circles so could use some further direction.
First a short version of where this V30 started and where it is now. Bought a stock Verizon V30 shortly after launch. It's been running fine since then. I recently discovered that the V30 was finally unlockable and rootable. So read the guide, downloaded all the needed files and of course had success. This also put me on the Oreo OS which I thought would be fine. Once that was done I then started digging into trying to get this V30 to spoof it's GPS location for PokemonGo. I've been running into wall after wall with that. I've previously wiped the whole phone without realizing I lost my backup and with some help here I got back up and running.... on Oreo. I've tried different options a few times and still can't get it working as others seemingly have. So... I decided to give up on Oreo and go back to Nougat.
I have tried over and over and keep running into a new walls and can't seem to get Nougat back onto my V30. I did succeed once though... Used LGUP and got Nougat back on. Then I tried to get TWRP back on and during that I lost my Nougat install. No worries, I thought. I'll go back to Oreo and try again... but since then I can't get anything to work as before.
LGUP either says I have the wrong DLL or that the phone isn't connected. I've tried going into download mode, but LGUP can't see the phone at all and after a short time the phone simply restarts. When I am able to get LGUP to see the phone it begins by restarting the phone... but then the phone restarts a couple times then finally goes into Android, but then LGUP gives errors about com ports or no phone. I'm at a loss as to what the issue is.
At this point I reflashed US99820H with TWRP and Magisk and the phone works... but HOW can I get back to Nougat???? What am I doing wrong or missing because I previously didn't have all these issues with LGUP.
I even made (I think) my own TWRP zip for US99810c Nougat using KDZZ.... I even installed that, but after the flash TWRP warned me I had no OS installed so I got cold feet about restarting it so put Oero back on instead and then decided to post here.
I know it's a lot of random info, but I could really use some more insight into what the "F" is causing all my errors or at least get Nougat up and running again. Really tired of banging my head against the wall.
Thank you as always.
Well, it seemed a bit dirty as I could never get LGUP and the V30 to work, but I think I got Nougat re-installed using TWRP. It seems my personal made US99810c TWRP Zip works. Unsure why TWRP was reporting I had no OS on the first try, but after double checking everything and trying again I didn't run into the same "error" with TWRP this round.
So... I have a US99810c TWRP installable zip... is anyone interested in having that uploaded on XDA?

Much longer boot up time after flashing custom rom and then reverting back to stock.

Hi guys hopefully someone can give some guidance on my issue.
I loaded a rom (pixel experience (android 10)) apart from stock for first time since I bought v30 about a year ago. Found it to be somewhat unstable, so went back to stock rom (android 9). Phone now boots to LG logo with startup tune, and just sits there on that screen for at least 1 minute longer than it did previously. Did a a complete wipe between flashes, went back to pixel experience to see if it went back to normal "boot speed", Phone bootup speeds went back to normal on that. Now back on stock again, and it's same thing with long boot time. Phone boots up fine eventually but it is quite painful to deal with now and regretting trying something different with zero payoff.
Any ideas?
Many have found flashing back to Nougat KDZ, then flashing to Pie KDZ (your bootloader will remain unlocked during both flashes), then re-installing TWRP, and re-rooting erases some of the changes you describe. See this post for reinstalling all that stuff, after you flash Nougat, then Pie KDZ.
INSTALL or REINSTALL TWRP on PIE stock KDZ with ALREADY-UNLOCKED BOOTLOADER
https://forum.xda-developers.com/showpost.php?p=79972584&postcount=3285
Can't guarantee it, but going back to Nougat temporarily flushes a lot of stuff out of the system.
Which variant do you have?
GetRekt_ said:
Hi guys hopefully someone can give some guidance on my issue.
I loaded a rom (pixel experience (android 10)) apart from stock for first time since I bought v30 about a year ago. Found it to be somewhat unstable, so went back to stock rom (android 9). Phone now boots to LG logo with startup tune, and just sits there on that screen for at least 1 minute longer than it did previously. Did a a complete wipe between flashes, went back to pixel experience to see if it went back to normal "boot speed", Phone bootup speeds went back to normal on that. Now back on stock again, and it's same thing with long boot time. Phone boots up fine eventually but it is quite painful to deal with now and regretting trying something different with zero payoff.
Any ideas?
Click to expand...
Click to collapse
Yep, exactly this. After many hours yesterday of troubleshooting and trying different stuff, what I did in end was downgrade to first oreo release and OTA'd my way backup, all back to normal now.
Phew, glad it's not something I have to live with.
ChazzMatt said:
Many have found flashing back to Nougat KDZ, then flashing to Pie KDZ (your bootloader will remain unlocked during both flashes), then re-installing TWRP, and re-rooting erases some of the changes you describe. See this post for reinstalling all that stuff, after you flash Nougat, then Pie KDZ.
INSTALL or REINSTALL TWRP on PIE stock KDZ with ALREADY-UNLOCKED BOOTLOADER
https://forum.xda-developers.com/showpost.php?p=79972584&postcount=3285
Can't guarantee it, but going back to Nougat temporarily flushes a lot of stuff out of the system.
Which variant do you have?
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