From the beginning:
Flashed CM 7. When it came out.
Was cool and all decided to go back to Jugs.
Put it on my internal and flashed (Wiped Factory, cache, delvik and formatted system)
Installation completed fine
Fixed Permissions and reboot
left it alone and didnt look at it for like ten minutes. I came back to it and it was off. So i thought atleast. It wouldnt turn on so i removed battery and replaced it turned on. Saw white Samsung. Cool sat it down and let it do its thing again
Came back to it. Off again. So i removed battery, replaced it and rebooted into recovery. Recovery came up fine. So i reflashed the rom. without all the wiping this time. Just flashed and rebooted.
Well same thing happened. I was able to connect in mounts to usb storage and copied over the unroot stock rom and flashed from external sd.
Same exact thing with this rom. Samsung logo would come up then nothing
So i got into download mode and hooked up to odin and flashed the only .tar i could find. Which i think is the only one on this forum. Tried 4 times and every time it fails at the end (at cache)... Removed phone after the 4th fail and pulled battery.
Tried to reboot into recovery and it brought me up to "ODIN MODE" saying "Firmware Upgrade encountered an issue. Please Select Revoery mode in Kies & try again" So i connected it to the computer and try to see it in Kies. It did not recognize it.
Odin on the other had still does recognize it. I can still attempt to flash the stock .tar but it always fails at the end "cache".
My phone will not boot. if i pull battery and turn on i get to this same "ODIN MODE". I cannot get into download mode anymore. I can only get into ODIN MODE.
Can someone please offer some advice on how to fix this. I have been looking for a good 2 hours and tried flashing this stock .tar for the last 3 hours hoping it will pass.
Thanks to anyone that can help.
Wait, unless I understood incorrectly, you didn't try a factory reset / flashing a different rom? You didn't have a nandroid back-up? (Sorry if I misread its very late here =p)
i did factory reset before trying to reinstall jugs.
Some how i got it to turn on. Odin the stock .tar. which failed at the end again like always. and then i odin stock recovery .tar that i had on my computer. this worked. so if anyone is ever having a similar problems
1. odin to stock. (it might fail at the cache section.)
2. odin stock recovery .tar
This should make it boot.
Well, as usual, I've managed to mess things up and here I am again. Somehow, I installed something or other that required rebooting. When I did, I kept getting an error that the systemui was messed up. So I decided to try to flash a custom ROM since it appeared this thing was already FUBAR and that's where the fun began. It WAS running stock 4.4.2. I wiped everything in preparation to flash the stock .tot file. Went to flash a zip from the external sdcard, and it refused telling me it couldn't mount the card! The only hopeful thing is that it powers up, I can get into download/recovery, and it's recognized by the PC through LGFT and ADB.
I can't flash anything, can't push or install through ADB, can't sideload anything. LG flash tools gets to about 38 seconds and then fails. It's like the devices permission were all changed to read only. The device is rooted and has CWM recovery. Is there a way to completely slick this thing (except for recovery - I'd do that too if need be) to reset permissions.
Any/all suggestions gladly accepted.
gjtoth said:
Well, as usual, I've managed to mess things up and here I am again. Somehow, I installed something or other that required rebooting. When I did, I kept getting an error that the systemui was messed up. So I decided to try to flash a custom ROM since it appeared this thing was already FUBAR and that's where the fun began. It WAS running stock 4.4.2. I wiped everything in preparation to flash the stock .tot file. Went to flash a zip from the external sdcard, and it refused telling me it couldn't mount the card! The only hopeful thing is that it powers up, I can get into download/recovery, and it's recognized by the PC through LGFT and ADB.
I can't flash anything, can't push or install through ADB, can't sideload anything. LG flash tools gets to about 38 seconds and then fails. It's like the devices permission were all changed to read only. The device is rooted and has CWM recovery. Is there a way to completely slick this thing (except for recovery - I'd do that too if need be) to reset permissions.
Any/all suggestions gladly accepted.
Click to expand...
Click to collapse
Surprisingly, there was nothing wrong with the phone nor the software nor the PC. After screwing around with this for a couple of days, I had a thought to try a different USB cable. So, I popped it on and, lo & behold, I'm able to flash to stock! Lesson learned: Don't use cheap cables and try changing cables when you're have weird problems like this. :good:
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.
Expert advice needed please. This is a puzzle that someone might enjoy solving.
Although I have a fair bit of experience with flashing, I tried to flash my 8.0 for the first time and it has dramatically failed. It was probably my fault - not an uncommon story.
What is less common is that I am struggling to figure out how to undo the damage I've done. What's really making this difficult is that no computer recognises the device as USB any more so I can't use Odin, Kies, etc to repair or return to stock. I have tried everything I can think of to deal with the USB issue, the usual cable, driver, port nonsense. I don't think the USB problem is Windows now.
I suspect one of these things may have happened:
The USB port just went bad coincidentally during this flash process (charge, no data). I have ordered a new port but it will take weeks to arrive.
Has the device come out of Developer/USB debugging mode somehow? I can't tell because I can't boot to an OS.
I wonder if the ROM flash has corrupted the firmware the deals with USB - is that possible? Where is the devices USB drivers located? Is it in the bootloader, something like BIOS?
I'm suspicious of the bootloader, as the screen is weirdly corrupted now when I turn on or reboot the device - fuzzy white lines rather than a logo - but that disappears when OS tries to load, or I go into Recovery/Download.
I actually did do a backup of the original ROM to the SD card; but restoring it doesn't work, just produces an endless Samsung boot, even if I then wipe and reset.
I can get into Download mode, and a Recovery (Philz for N5120) but since I can't connect to the devise with USB in any way, it's very hard to get the Recovery to flash anything new and useful. I did put my SD Card in another phone and copied over the stock ROM zip from Samsung, but it refuses to flash - I think because it doesn't like Philz Recovery? I can't think how to replace Philz Recovery with another by flashing, without USB.
I may have to wait to replace the USB port, but I fear that won't fix it. Until then, I can only think of one other thing to try, and that is to copy a ROM onto the SD Card through another phone, and try to flash it. Lineage doesn't flash, and nor does the stock zip I got from Samsung. Would anything else work?
Can I flash an alternative recovery from within the recovery? Philz only lets me flash zips, not img or tars.
So it's quite a mess, but if anyone has a brilliant idea of how to get out of this, I'd love to hear it.
THANK YOU if you have a genius idea.
So after a few days of working on this, I did manage to resolve it, and I thought I'd just add a note about how I escaped this obscure problem.
The device went bad because I stupidly flashed an incompatible Recovery to the device and somewhere between doing this, backup and restoring and flashing, it corrupted mostly everything including something in the bootloader.
Oddly enough, the solution seemed to be to mess up the Recovery even more by flashing something even more random - it seems this provoked the device into restoring its own basic Recovery. Using this to wipe and reset the device somehow enabled Download mode's USB interface to start working again so I was able to use Kies to return to stock, which repaired everything including the bootloader.
Finally, I flashed the correct Recovery for this device, and then managed to flash the ROM I wanted. A happy ending to a stressful story; the device now works better than it ever has done before.
I was running the latest version of TWRP and a rooted version of the LG G6 port. Everything was stable and worked fine. So I was ready to give it back to its owner who I had modded it for. I went into the settings menu of the phone and did a standard factory reset to remove my account that was logged in so I could test the phone out before giving it to the owner. well when it finished resetting and rebooted, its been stuck in a boot loop ever since.
Tried just clearing both Dalvik Cache and Cache, to no avail. Tried Reflashing the rom and starting over. Still nothing. Tried flashing a different rom. Still nothing.
So what else can I try? and also if its the only thing I can do, rest it all the way back to stock factory everything. How do I do that on this phone. What program do I need and what files. and whats the steps to complete the process.
Thank you in advance for all help that is given
i factory reset in twrp and turned on developers options after first boot then reflashed twrp i always forget backup lol or delete it or use kdz you flashed before anyway i can help i will if you still need
if you have tried to flash the same custom rom or another is still not working, flashes with the program "lg up", you will need a kdz file,and the corresponding drivers. if with that you can not watch this tutorial before doing anything.
if you have a backup made with twrp, it flashes again.
https://forum.xda-developers.com/g4/help/unbrick-lg-g4-brick-hs-usb-qdloader-t3542785
during this process you will have to disassemble the back of the phone, (plastic) you do not need to remove the motherboard completely from the phone, anyway if you can enter download mode try with lg up tool.
if you need help around here we are.
Well now in the process of trying to fix it. The phone bricked and will no longer turn on at all. Is there anyway to fix this ?
Silicon Knight said:
Well now in the process of trying to fix it. The phone bricked and will no longer turn on at all. Is there anyway to fix this ?
Click to expand...
Click to collapse
Can you get into download mode?
Also, it's possible you have been hit by the bootloop