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Hello everyone,
yesterday I flashed a new Cyanogenmod 14 nightly (12062016) for my G4 from earlier nightly in TWRP. After reboot the phone keeps going back to TWRP and I can't seem to get it to boot to system..
I tried factory reset, reflashing back to old nightly, flashing stock.. but nothing seems to work.
Also tried doing this in the TWRP terminal:
dd[space]if=/dev/zero[space]of=/dev/block/platform/f9824900.sdhci/by-name/fota
Didn't fix the loop, I guess because it wasn't the OTA update that caused the problem in the first place.
If anyone has an idea, I would greatly appreciate the help!
Thanks.
If you can reach download mode you could try reflashing back to stock then starting again.....Hope you get yours fixed - Sorry to say this but mine did a very similar thing only 24 hours before you posted!!! Only mine was on stock FW and was in use at the time - I've now had to swap it as valuebasket who sold me the phone have ceased trading. If yours is a UK model you may be able to get it replaced under warranty - believe that LG guarantee their phones for 2 years and a ruling by the European court said that flashing a custom rom doesn't invalidate any warranties.
I have the same exact issue, I also flashed the latest CM14 nightly and cannot get the device to boot any rom.
I have even tried flashing stock rom but I get the same problem.
From what I have read, the bootloop issue happens once the device boots but I don't seem to be getting that far.
Any ideas?
Ran into the same problem 3 days ago. This is the first time I have encountered a non-revertible issue in 3 years as a cyanogenmod user. This changes my opinion on how safe it is to make use of a custom ROM. I tried to wipe everything, reinstall TWRP, change TWRP with another recovery, reinstall a safe NAND backup of mine.....nothing.....it went into boot loop. Before I read this post, I was convinced my phone encountered the infamous G4 bootloop problem.....now I see there are other examples, so it shouldn't be the case. Long story short, I had to check my device in at the LG assistance, with 25 days as time forecast.
The guilty nightly was 20161205.
I have never seen anything like this...
This has solved it for me - I installed LG Bridge and flashed the factory firmware using the tool. Now it seems I'm back on stock but at least it's working.
got mine working. I had to install LGUP and flash stock ROM. Once flashed I installed CM14 and I am back up and running again.
I tried LGUP but it could not recognize the device while this was looping.....a bad experience......
I have the same issue. My phone was updated to 20i via the original stock firmware, then I put twrp 3.0.2-0 and cyanogenmod on. I did a cyanogenmod update from within cyanogenmod, which just booted into twrp, then I manually installed the update zip that cyanogenmod had downloaded, then it always boots into twrp. I wonder if initiating the update from within cyanogenmod was the cause. The phone is not detected by LGUP or LG Bridge. I've tried this on a win10 machine, and a win7 vm from linux. I have access to twrp, and download mode by doing the reboot into bootloader from within twrp.
If those people who have fixed this could give more details about how they did it, that would be good. What exact steps did you take? What stock firmware version did you have before installing a custom rom? What OS version were you using? What twrp version?
Well. Mine got stuck in bootloop for the second time today. What is going on? In between the two bootloops I had one good update with CM. Using TWRP 3.0.2.1. Steps to reproduce failure: updating CM from within CM, it autoreboots into TWRP and after that nothing happends, no autoinstall. Then after a manual install of the new CM the bootloop starts.
Resolve the problem:
* Install LGUP 8994 DLL Ver 0 0 3 23, Install LGUP Install Ver 1 14, get the latest KDZ
* Get the phone into download mode with usb cable and after that in firmware update mode
* Startup LGUP and choose refurbish and select the kdz file.
* After that you can boot into your stock LG firmware again, reinstall TWRP an CM. If you want so.
Read that it is advised to manual update cm from within TWRP. TWRP will get an update in the future to solve this bootloop problem.
iankelling said:
I have the same issue. My phone was updated to 20i via the original stock firmware, then I put twrp 3.0.2-0 and cyanogenmod on. After a cyanogenmod update, it always boots into twrp. The phone is not detected by LGUP or LG Bridge. I've tried this on a win10 machine, and a win7 vm from linux. I have access to twrp, and download mode by doing the reboot into bootloader from within twrp.
If those people who have fixed this could give more details about how they did it, that would be good. What exact steps did you take? What stock firmware version did you have before installing a custom rom? What OS version were you using? What twrp version?
Click to expand...
Click to collapse
I second that. Same issue and neither LG Up nor LG Bridge will recognize my device. Looking in device manager there are no serial interfaces. Do I need a special driver that provides a com port for a phone in recovery or fastboot mode?
---Edith 2016-12-12: Found a solution for my issue:
The phone has to be in _download_ mode, not in recovery or fastboot. After realizing that I have to boot the phone in a different manner, it will be recognized by LG UP.
Here is how to boot the pone in download-mode:
- Power off your LG device.
- Press and hold Volume Up button.
- Connect your device to PC with a USB cable while holding the Volume Up button.
- You’ll boot into download mode with “Firmware Update” written on top of the screen.
Now everything is fine again.
croclacrimae said:
Hello everyone,
yesterday I flashed a new Cyanogenmod 14 nightly (12062016) for my G4 from earlier nightly in TWRP. After reboot the phone keeps going back to TWRP and I can't seem to get it to boot to system..
I tried factory reset, reflashing back to old nightly, flashing stock.. but nothing seems to work.
Also tried doing this in the TWRP terminal:
dd[space]if=/dev/zero[space]of=/dev/block/platform/f9824900.sdhci/by-name/fota
Didn't fix the loop, I guess because it wasn't the OTA update that caused the problem in the first place.
If anyone has an idea, I would greatly appreciate the help!
Thanks.
Click to expand...
Click to collapse
I was able to get out of that by also wiping by-name/misc. Don't do that, though, because then your wifi mac address will get messed up and you'll spend all day looking for a permanent fix for that.
I suggest reflashing a stock KDZ using LGUP, as others have said. You can get the usb drivers from LG Bridge.
I will release a fix for that soon. Check the twrp thread for updates on this.
Hi
I also have this problem
I installed cm-14.1-20161201-NIGHTLY-h815 successfully and was running it for almost 2 weeks without issues, today I updated to cm-14.1-20161213-NIGHTLY-h815 from cmupdater and I have been ending up in recovery every time I rebooted.
I tried flashing the latest cm recovery and reflashing the rom, with full wipes but no luck.
Full steps of recovering would be appreciated (for example, there are comments about flashing the latest stock rom, but a link to this rom would be helpful)
Thanks
Good news regarding this:
http://forum.xda-developers.com/showpost.php?p=70082901&postcount=213
The above will fix TWRP bootloop issues as well and I also released a first h811 version which should allow installing CM etc as it should.
Keep in mind that this is a BETA and not an official TWRP release.
Please report back in the above thread!
.
Does your twrp beta really fix the boot loop even it is already happening. What do I have to wipe? I have not managed to get out of the boot loop despite intalling it.
Is using using LG Up to flash to the stock rom really the only option?
Edited 2017-01-25 2:45 pm:
Well, sometimes you just have to be patient. Powered down the phone and when th H815 restarted CM did boot. Great. :good:
Hey, I just want to share a small detail, possibly a fluke that helped me overcome the bootloop.
So...I started with a fresh, stock H815, I don't quite remember the firmware version..it was something like version "20g"..
OK, I looked up several guides and tried to get the newest stable versions of each tool. I went through with the official bootloader unlock, then moved on to rooting: Kingroot didn't work for me so I went on installing twrp in fastboot mode so I could afterwards install supersu and root.
I got there eventually but first I was stuck in bootloop - kept ending up in twrp interface. I found the 2 dd commands but those didn't work for me as the msm_sdcc folder did not exist, but instead there was a "f9824900.sdhci". Tried to overwrite this one ...but as others have stated as well, it didn't work.
At that point, I had nothing to lose, I was starting to accept that I had soft-bricked my precious G4 so..I went on installing the DU 10.6 7.1.1 rom and the stock gapps, wiped dalvik, rebooted and held my breath...not literally
About 12 minutes later, after an endless red, spinning logo, my shiny ping pong paddle showed me a different screen, a fresh start welcome screen .
Almost 24h / 10-12 reboots (twrp included) / 70+ apps installed and removed later, the new OS holds around 2G ram average, a bit better battery life, smoother transitions, flawless navigation, flush streaming over both 3G/LTE & 2.4/5 G wifi.
FYI the reboots were intended, wanted to see consistency in boots - we're in the green . Now testing long term stability with moderate/high usage.
There is 1 aspect I noticed, there are a couple of contexts when the interface burps (several menus, various situations, never in apps) and resets back to homescreen...but I think that's more of a launcher topic than an OS one.
Other than that, so far I'm happy with the mod.
Hope my experience helps others that might be in the same spot I was or at lest boosts their confidence to try out a decent idea they might be pondering.
Lenovo appear to have made downgrading from Nougat to Marshmallow difficult. The commands to flash certain images such as the bootloader and modem from fastboot have been disabled when the bootloader is unlocked, and relocking the bootloader seems to be impossible with the standard oem lock command. I had no knowledge that I would lose a certain degree of control over my P2 before I unlocked the bootloader, so I am rather disillusioned about it all at the moment.
When I first unlocked I was running the stock 3 UK Marshmallow firmware. I installed TWRP (modified) and somehow I soft-bricked my phone because one of the ROMs I tried flashing got stuck at the Kernel writing part and restoring TWRP stock backup froze when writing the boot partition so I was unable to get anything but a blue notification LED when resetting. I also attempted to restore stock backup with non-modified TWRP and that didn't help either. I wiped data each time I tried to do something, and also changed file system from F2FS to EXT4 and back again several times. Never in my 6 years of flashing ROMs had I encountered such issues.
Nothing was working, so all I could think to do was use fastboot commands to restore each stock image. Luckily this worked without a hitch because I hadn't upgraded to Nougat yet, but I still didn't know about the potential issues with downgrading, so when I flashed the ROW stock ROM, I upgraded it to Nougat in the OTA menu. Then I stumbled upon all the problems people have been having when they attempt to use fastboot to restore stock MM (the only ROM with fastboot parts for the P2?) the main one being that their signal stops working (modem partition corruption / incompatibility?) and even when upgrading again to Nougat, their signal is still gone. There is an ADB shell command that may or may not fix this.
Now I'm on stock ROW Nougat and stock recovery because I'm worried that I might inadvertently mess something up again and my only hope would be to fastboot flash back to stock and risk losing my signal. There doesn't appear to be a "safety line" when upgrading to Nougat for me atm because of the restrictions Lenovo seem to have put on fastboot commands.
I've had Google phones for years now, including previous Pixel, but I just got an XL 2 yesterday and I'm regretting it.
It's Google unlocked and running June's latest image. I've experienced various app crashing on stock, and random reboots.
Then there's the rooting and flashing. I unlocked the bootloader and installed the most recent, twrp (the one verified to work on xda for roms) but can't flash anything.
My twrp either hangs on the twrp start screen, or when it does load, the touch screen doesn't work. When I can get it going, every rom I flash gives me an error on the second step. I'm flashing on slot B by the way, that's what boots up when I boot to twrp.
Lastly, I am unlocked both for flashing and flashing_critical thru adb, so I'm at a loss and seriously confused.
When I FIRST unlocked everything, I was able to flash Nitrogen rom but I got stuck at the rom splash screen.
Tldr:
-What is the Correct install method/sequence for roms?
-do the slots matter?
-is random reboots and app crashing on stock a sign of a hardware issue?
I haven't installed a custom ROM on my P2XL, so I'm running rooted stock. Anyway, for rooted stock, this is what I did.
Entered bootloader mode.
Booted into recovery using the command "fastboot boot recovery.img", where "recovery.img" is the TWRP recovery iteslf. In my case, I renamed it "taimen.img".
Flashed the TWRP installer zip needed for the P2XL (Required if intending to replace the stock recovery).
Rebooted into recovery.
Flashed a custom kernel (Recommended - resolves touch issues in TWRP).
Flashed Magisk.
6. Rebooted.
If installing a custom ROM, flash it prior to the custom kernel. Slots only matter if running stock. Random reboots and app crashes are not signs of a hardware issue.
stevew84 said:
I've had Google phones for years now, including previous Pixel, but I just got an XL 2 yesterday and I'm regretting it.
It's Google unlocked and running June's latest image. I've experienced various app crashing on stock, and random reboots.
Then there's the rooting and flashing. I unlocked the bootloader and installed the most recent, twrp (the one verified to work on xda for roms) but can't flash anything.
My twrp either hangs on the twrp start screen, or when it does load, the touch screen doesn't work. When I can get it going, every rom I flash gives me an error on the second step. I'm flashing on slot B by the way, that's what boots up when I boot to twrp.
Lastly, I am unlocked both for flashing and flashing_critical thru adb, so I'm at a loss and seriously confused.
When I FIRST unlocked everything, I was able to flash Nitrogen rom but I got stuck at the rom splash screen.
Tldr:
-What is the Correct install method/sequence for roms?
-do the slots matter?
-is random reboots and app crashing on stock a sign of a hardware issue?
Click to expand...
Click to collapse
Ya know my friend, after our conversation yesterday, and your questions in the nitrogen thread, and now random reboots and app crashes, I think it's time to consider a factory reset. You shouldn't be having those problems on a stock setup. If that's not successful, then I would definitely consider an RMA. Just my 2 cents worth :good:
I agree. I got it used tho which is an issue.
Badger50 said:
Ya know my friend, after our conversation yesterday, and your questions in the nitrogen thread, and now random reboots and app crashes, I think it's time to consider a factory reset. You shouldn't be having those problems on a stock setup. If that's not successful, then I would definitely consider an RMA. Just my 2 cents worth :good:
Click to expand...
Click to collapse
Just so you know, I got the rom to flash finally, but it's stuck at the rom splash screen during first boot. I'm going to leave it and hope it eventually boots up.
stevew84 said:
Just so you know, I got the rom to flash finally, but it's stuck at the rom splash screen during first boot. I'm going to leave it and hope it eventually boots up.
Click to expand...
Click to collapse
If it doesn't after 5 minutes, do a hard restart with the power button. If that doesn't work, then reboot to twrp and flash the rom and twrp installer zip again.
Ok cool thanks. I relocked bootloader last night and went back to stock. Unlocked it all this morning from my work computer and different unlock app. So here's hoping.
Badger50 said:
If it doesn't after 5 minutes, do a hard restart with the power button. If that doesn't work, then reboot to twrp and flash the rom and twrp installer zip again.
Click to expand...
Click to collapse
I finally got everything to work. My vendor image is a mismatch but I could just flash junes and be done with it, right?
stevew84 said:
I finally got everything to work. My vendor image is a mismatch but I could just flash junes and be done with it, right?
Click to expand...
Click to collapse
What did you do to get it to work? You could just flash the June vendor.img to both slots. If you keep getting a vendor mismatch, probably nothing to worry about according to the Dev of nitrogen.
Different machine, cable and unlocking tool.
But I went to bone stock with locked bootloader, then flashed the newest twrp with the newest all in one tool. Was on slot A so wiped everything and flashed rom plus twrp again. I rebooted system to slot B, but then it just hung at the rom splash screen.
So I did it all over on slot A, ignored the "no os installed" message and booted anyway. Then it fired up. Rebooting into twrp from there took me to B, which is where I need to be for an image file or root.
So yea, thanks for the help.
I'm having this issue also. I tried flashing nitrogen, it hung. I tried to go back with factory reset Img and nothing happens in adb. Flashed the may img and it wouldn't boot all the way up. Now I'm stuck in bootloader trying to figure this all out. Seems like nothing in doing is working. I can get recovery to boot, but no files inside so idk. Tried to sideloadb nitrogen, but it said adb out of date for device when sdk is fully updated.
MatthewRobinson said:
I'm having this issue also. I tried flashing nitrogen, it hung. I tried to go back with factory reset Img and nothing happens in adb. Flashed the may img and it wouldn't boot all the way up. Now I'm stuck in bootloader trying to figure this all out. Seems like nothing in doing is working. I can get recovery to boot, but no files inside so idk. Tried to sideloadb nitrogen, but it said adb out of date for device when sdk is fully updated.
Click to expand...
Click to collapse
You didn't mention the out of date message in your other post, but uninstall SDK and then download the stand-alone adb/fastboot binaries from May of this year. Dump that in a folder (eg. c:\adb) and put that folder in your path statement. Manually flash the full factory image without modifying flash-all.bat. Post your screeen if you have any errors. :good:
stevew84 said:
I agree. I got it used tho which is an issue.
Click to expand...
Click to collapse
Google knows the date the phone was purchased based on imei number and honors their warranty by date, not owner. Unless it was blacklisted.
smartymcfly said:
Google knows the date the phone was purchased based on imei number and honors their warranty based on that.
Click to expand...
Click to collapse
Thanks. I might try to take advantage.
I recently dug out my old G4 to see if I can repurpose it for anything or just have it as a back up.
It's an H815 European variant with unlocked bootloader. When I last used it I had it running a custom ROM but when I got a new phone I wiped it somehow with TWRP (this is a few years ago so I can't remember).
Now whenever I turn it on, it boots into TWRP. If from TWRP I choose reboot to system, it boots to TWRP.
I tried to install a ROM but it wouldn't, giving the error "this ROM is for P1,G4,H815 (or something like that), your device is .".
So, I edited the ROM metadata and took out the device requirements and it installed fine, as did GAPPs & SuperSU, but still it only boots to TWRP. I've flashed bootloaders, kernels, god knows what else, but it only boots to TWRP. That's it.
I also tried to return it to stock using these: https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 but it had errors connecting to servers and never installed anything.
I'm aware that I won't be able to recover anything on the device and that's fine! I just want to boot it with ANY ROM, and I'd be grateful for any help! Thanks!
mrmrchoice said:
I recently dug out my old G4 to see if I can repurpose it for anything or just have it as a back up.
It's an H815 European variant with unlocked bootloader. When I last used it I had it running a custom ROM but when I got a new phone I wiped it somehow with TWRP (this is a few years ago so I can't remember).
Now whenever I turn it on, it boots into TWRP. If from TWRP I choose reboot to system, it boots to TWRP.
I tried to install a ROM but it wouldn't, giving the error "this ROM is for P1,G4,H815 (or something like that), your device is .".
So, I edited the ROM metadata and took out the device requirements and it installed fine, as did GAPPs & SuperSU, but still it only boots to TWRP. I've flashed bootloaders, kernels, god knows what else, but it only boots to TWRP. That's it.
I also tried to return it to stock using these: https://forum.xda-developers.com/g4/general/guide-lg-g4-stock-firmware-to-stock-kdz-t3107848 but it had errors connecting to servers and never installed anything.
I'm aware that I won't be able to recover anything on the device and that's fine! I just want to boot it with ANY ROM, and I'd be grateful for any help! Thanks!
Click to expand...
Click to collapse
Go to thw official TWRP thread and flash the latest preview TWRP version.
Sent from my OnePlus 6T using XDA Labs
Try latest rom and one by one different rom. It's rom related issue. Don't worry, it'll be okay.
i updated my phone yesterday since there's a new update available and after an hour it restarted and keeps on restarting after 15secs. Even i do something or not, or even in safe mode.
i tried extracting all my files using twrp but upon checking that i still have fastboot bootloader (unlocked) but my twrp is gone and its back to colorOS recovery. i tried online update to keep my data but still the problem continues. i tried flashing twrp using adb but its not detecting my phone since it can only open for 15 secs before it restarts again. but i managed to see that OEM unlocking and usb debugging is turned on im running out of options here. i cant just reflash a new rom/ota without getting my files. any chance anyone can help. Thanks XDA!
jvincent2713 said:
i updated my phone yesterday since there's a new update available and after an hour it restarted and keeps on restarting after 15secs. Even i do something or not, or even in safe mode.
i tried extracting all my files using twrp but upon checking that i still have fastboot bootloader (unlocked) but my twrp is gone and its back to colorOS recovery. i tried online update to keep my data but still the problem continues. i tried flashing twrp using adb but its not detecting my phone since it can only open for 15 secs before it restarts again. but i managed to see that OEM unlocking and usb debugging is turned on im running out of options here. i cant just reflash a new rom/ota without getting my files. any chance anyone can help. Thanks XDA!
Click to expand...
Click to collapse
UPDATE:
i gave up all my files just make my phone works
i tried changing stock OS to custom ROM (lineage,Evolution) still getting the same issue that its still restarting after 15 secs or just after wifi connection in the setup.
also tried format data, formats cache, dalvic, system and data in twrp then back to fastboot.
since ""--disable verity" is unrecognizable what i did is just flash is "fastboot flash vbmeta vbmeta.img" then flash twrp then flash the rom again but still im getting the same outcome.
tried going back to stock (got the ozip file from realme)but getting zip compatibility error and after i deleted compatibility.zip then getting error 7 so tried deleting asserts from updater-script but still getting no where so i tried using orange fox recovery. it does install but still the issue persist.
any other ideas for me to try guys?
TIA
You must be flashing wrong file.
jvincent2713 said:
UPDATE:
i gave up all my files just make my phone works
i tried changing stock OS to custom ROM (lineage,Evolution) still getting the same issue that its still restarting after 15 secs or just after wifi connection in the setup.
also tried format data, formats cache, dalvic, system and data in twrp then back to fastboot.
since ""--disable verity" is unrecognizable what i did is just flash is "fastboot flash vbmeta vbmeta.img" then flash twrp then flash the rom again but still im getting the same outcome.
tried going back to stock (got the ozip file from realme)but getting zip compatibility error and after i deleted compatibility.zip then getting error 7 so tried deleting asserts from updater-script but still getting no where so i tried using orange fox recovery. it does install but still the issue persist.
any other ideas for me to try guys?
TIA
Click to expand...
Click to collapse
It seems like you're flashing incorrect OS version onto your device. Note there are 3 different versions of realme x2. i.e rmx1991, rmx1992, rmx1993 with each having different versions of their own.
I've seen rmx1992ex here on xda for custom roms but my device came with rmx1992aex version.
So check your's and flash correct file.
maxs8007 said:
It seems like you're flashing incorrect OS version onto your device. Note there are 3 different versions of realme x2. i.e rmx1991, rmx1992, rmx1993 with each having different versions of their own.
I've seen rmx1992ex here on xda for custom roms but my device came with rmx1992aex version.
So check your's and flash correct file.
Click to expand...
Click to collapse
Got the same problem. My X2 is RMX1993.. i think i updated the wrong firmware. My current build number is RMX1993EX_11_C.12 Not sure if it's the same but I've got a feeling that it's not.. found a guide on how to flash the stock rom but the problem is that everytime I use ADB. Reboot to bootloader the phone just restarting. And I think my bootloader is also locked. Any suggestions? Really need your help.