Develop Bugs

[Q] I'm stuck in a bootloop

Need some help please !
First of all I'm stuck in bootloop with my nexus 7 2013 (not unlocked). So I pluged my N7 in my computer (windows 7) to flash the Rom. I also have a problem with the driver when I connect my N7 to the computer and I get the message (MTP device failed ). So I've tried to install manually new drivers from Google but it says that my drivers are up to date ??? Now It seems that it's impossible to flash my N7 if my computer doesn't recognize my device.
What is the best thing to do now
thanks in advance
claude

Clodio69 said:
Need some help please !
First of all I'm stuck in bootloop with my nexus 7 2013 (not unlocked). So I pluged my N7 in my computer (windows 7) to flash the Rom. I also have a problem with the driver when I connect my N7 to the computer and I get the message (MTP device failed ). So I've tried to install manually new drivers from Google but it says that my drivers are up to date ??? Now It seems that it's impossible to flash my N7 if my computer doesn't recognize my device.
What is the best thing to do now
thanks in advance
claude
Click to expand...
Click to collapse
Well, it looks like you have a couple of things going on. I can't remember how I got windoze to recognize the n7, but it had something to do with deleting the driver then plugging the n7 back in and letting it install the driver again. I remember I had to play around with the thing for a little while. Trying to update the driver wouldn't work for me either. As, far as the bootloop, you could try this one click tool: http://forum.xda-developers.com/showthread.php?t=2381582 Finally, you could try wugfresh's toolkit if you want to take the lazy route. It actually works pretty well. It might even help with that driver issue. http://forum.xda-developers.com/showthread.php?t=2389107 you don't use it to install a rom, but you do need to install a custom recovery and the toolkit could help with things like that. I personally use the toolkit to return a tablet or phone back to factory condition, lock the bootloader, etc...

You could also try to do a factory reset from the stock recovery. That fixed a boot loop for me after unlocking my bootloader.

Problem solved
I finally contacted Google Canada Monday morning and spoke with with a tech. Wow...very impressed by the service and my problems are now solved. First we went to Recovery mode ( Power and volume down) in that mode you then press again power and volume up and release at the same time. Then,from that menu you can now swipe all data and it solves the Bootloop problem. Finally I reinstalled all my app and back to normal. I pluged my N7 to my computer and now no more driver problem....
Thanks
Claude:laugh:

Clodio69 said:
I finally contacted Google Canada Monday morning and spoke with with a tech. Wow...very impressed by the service and my problems are now solved. First we went to Recovery mode ( Power and volume down) in that mode you then press again power and volume up and release at the same time. Then,from that menu you can now swipe all data and it solves the Bootloop problem. Finally I reinstalled all my app and back to normal. I pluged my N7 to my computer and now no more driver problem....
Click to expand...
Click to collapse
That's what I was referring to in my post, sorry for not giving a more detailed explanation.
Glad to hear you that you had a good experience with Google support and that you solved your problem. :good:
Thanks for giving feedback and have lots of fun with your N7!

Hello!
I'm stuck in a loop boot too. I flashed without wiping... I try to boot in recovery mode but it's impossible. The combination vol up, down and power doesn't work. It tries to boot as usual so starts in a loop again.
Sent from my Nexus 4 using Tapatalk now Free

frozst said:
Hello!
I'm stuck in a loop boot too. I flashed without wiping... I try to boot in recovery mode but it's impossible. The combination vol up, down and power doesn't work. It tries to boot as usual so starts in a loop again.
Sent from my Nexus 4 using Tapatalk now Free
Click to expand...
Click to collapse
Let me get this straight....are you trying to hold volume up & down at the same time? If so, you cannot please both volumes at the same time. Also, to boot into the bootloader (same as fastboot, not recovery) is power + volume down. The easiest way to do this is to hold volume down, then press and hold the power button. If the tab was on, and the screen goes black, let go of the power button, but keep holding the volume down button. It should boot into the bootloader soon enough.

1. Push volume up and power button for 5 seconds then release the power button.
2. Do a complete wipe of the system and reinstall the system.zip again and reboot.
If it doesnt load the recovery do this.:
1. Hold volume down and power button for 5 sec. Release the power button and volume once you enter the download screen.
2. Use odin in your Pc to install the rom you want or stock rom.
(3. If you installed stock rom go back to the steps I wrote at the top and flash a new rom)
Remember that you need to be rooted.

OK so I was trying with the wrong combination.
With both vol up/down + power worked.
I restored and it's up and running again.
Thanks!
Sent from my Nexus 4 using Tapatalk now Free

Getting into TWRP Recovery

Hello everybody,
I hope somebody can help me, I just flashed TWRP and CMB on my 8.3
But i forgot to wipe data before. Now the boot animation still stays.
Can somebody tell me how to get into TWRP, I tried everything. Power + Vol + - ....
Is it a good idea to recover it with the LG tool?
Thanks,
Beagle

First of all you need the 2.6.3.1 version of twrp as the previous one cant enter recovery with a key combo. Then try this:
- With Device Powered Off And Unplugged
- Press and hold Power Button + Volume Down
- When the LG logo shows up, release the power button only
- Now press and hold the Power and Volume Up button while keeping your hold on the Volume Down button
- When the factory reset screen appears, release your hold on all buttons
- Follow On Screen Indications
Click to expand...
Click to collapse
although it will say to perform a factory reset it will enter recovery mode
take a look here,its posted by the developer himself http://forum.xda-developers.com/showpost.php?p=48338272&postcount=16

yes i have 2.6.3.1 because otherwise i wouldnt be able to install cmb.
And i tried all this combos, but nothing worked.

Beagle1987 said:
yes i have 2.6.3.1 because otherwise i wouldnt be able to install cmb.
And i tried all this combos, but nothing worked.
Click to expand...
Click to collapse
I just tried it myself, and he's got it basically right.
When you first see the LG logo after holding Vol Down + Power, let go of both buttons, then immediately hit and hold Vol Down + Vol Up + Power. It should register.

Beagle1987 said:
yes i have 2.6.3.1 because otherwise i wouldnt be able to install cmb.
And i tried all this combos, but nothing worked.
Click to expand...
Click to collapse
It does work it is tricky tho
took me a few tries the first time

113832955
Ok Thanks guys I got it after 100 tries
Now I factory reseted it and everything is working!
Thank you all for your great work!

Beagle1987 said:
Ok Thanks guys I got it after 100 tries
Now I factory reseted it and everything is working!
Thank you all for your great work!
Click to expand...
Click to collapse
They didn't make it easy haha the G2 is a little ticky too and completely different keypress just to make it even more confusing lol thanks LG

[Q] Acidentally Wiped System, What can I do?

I accidentally formatted the system partition so the tablet will not boot. I can't get back in to TWRP, I didn't have anything to flash in there anyway because CM would fail. What can I do?
Thank you.

You could try the LG mobile support tool

techrider6262 said:
You could try the LG mobile support tool
Click to expand...
Click to collapse
I think you have to pay to use it.

No its free just go the the website and download it.You can downloaded it from the link in this post.
http://forum.xda-developers.com/showthread.php?t=2543350

Can you write to it in ADB? How far does it come when it tries to boot? just LG bootloop? And what edition of TWRP did you use to flash?

CuraeL said:
Can you write to it in ADB? How far does it come when it tries to boot? just LG bootloop? And what edition of TWRP did you use to flash?
Click to expand...
Click to collapse
I realize why it didn't flash. Because I was using an older version of TWRP that wouldn't flash AOSP roms. Is there any way to boot to recovery from the device being off?
The method in the link doesn't seem to work anymore.

How far do you get in the boot? LG screen? When connect to PC do you get connect/disconnect sounds? Please answer the questions as I'm thinking about this. I can't find any key combos so we need to find out if we have a small window where we can talk to ADB.. Any connection sounds? How far do you get?
Are you familiar with ADB and Fastboot?

CuraeL said:
How far do you get in the boot? LG screen? When connect to PC do you get connect/disconnect sounds? Please answer the questions as I'm thinking about this. I can't find any key combos so we need to find out if we have a small window where we can talk to ADB.. Any connection sounds? How far do you get?
Are you familiar with ADB and Fastboot?
Click to expand...
Click to collapse
I don't hear any sounds. It just stays at the LG screen. I made it to the factory reset screen but it didn't do anything. I followed these steps:
Make sure your device is fully charged and turned off.
Simultaneously press and hold the power and volume down buttons.
When the LG logo shows up, release the power button only.
Now press and hold the power and volume up button while keeping your hold on the volume down button.
When the factory reset screen appears, release your hold on all buttons.
Press the power button to continue.
Press the power button again to confirm if you’re sure you wish to continue with the reset.
Click to expand...
Click to collapse
ADB doesn't work at the LG screen, I just get the error: device not found message.
I can just send it back but I'd prefer to get it working.
Thanks

skatingrocker17 said:
I don't hear any sounds. It just stays at the LG screen. I made it to the factory reset screen but it didn't do anything. I followed these steps:
ADB doesn't work at the LG screen, I just get the error: device not found message.
I can just send it back but I'd prefer to get it working.
Thanks
Click to expand...
Click to collapse
Okay, okay, I dunno what you can do maybe ADB Works in here: Turn off the device AND disconnect from PC. When shut Down, you DONT hold power, but hold Volume up + Volume Down, when you hold both, you plug in USB cable. This takes you to download mode. That is perhaps a step in the right direction if you can start ADB from download mode. Then you can boot into recovery. But I don't know. This is maybe the last option for you. No recovery key combo has been discovered yet. If you can do a fastboot boot recovery from download mode, that would be golden. Then you can use the SD Card to get back with the newest TWRP and the CM11 nightly. Please let me know if this Works man. I'm sorry for your loss, otherwise. Factory Reset, as you said, will not work, since there's nothing to "restore" from. You deleted it. :/

Unfortunately, ADB doesn't work in download mode.

skatingrocker17 said:
Unfortunately, ADB doesn't work in download mode.
Click to expand...
Click to collapse
Were you able to download the LG tool?

skatingrocker17 said:
Unfortunately, ADB doesn't work in download mode.
Click to expand...
Click to collapse
Damn that sucks. I was looking around the G2 forums to see about download mode and what LG usually did with it. Apparently they are using something called KDZ files, and they are able to flash stock roms back onto the device with something called FlashTool. Now, if it were my tablet and it was in the state yours is, I would try and read the tutorial. And then I'd follow it step by step but instead of the G2 KDZ, I'd see if I could find a KDZ with a G Pad rom instead. And just.. Yolo that ****.. From download mode.
Here's the thread, if you wanna read it.. http://forum.xda-developers.com/showthread.php?t=2432476. I dunno man. The LG Tool thing, maybe you should try and see what techrider6262 is saying, he might have an idea as well, otherwise, just go all out crazy and see if you can magically use the FlashTool on your G Pad instead of the G2, since they are from "same line up." I know that's not the same as same model and so on.. But still.. Download mode.. Is download mode. Ofc. the tool itself or the settings in the tool might not work.. But.. You know. Why not.. Can't hurt.. Download mode will prolly still be available afterwards.. "For science."

got the same problem. i couldnt i wiped all data on the tablet and couldnt select the rom from the ext.sd. now its stuck at the lg logo.

skatingrocker17 said:
Unfortunately, ADB doesn't work in download mode.
Click to expand...
Click to collapse
blazze11 said:
got the same problem. i couldnt i wiped all data on the tablet and couldnt select the rom from the ext.sd. now its stuck at the lg logo.
Click to expand...
Click to collapse
This guys.. Is for download mode fix. I am pretty sure this works. Since you have access to Dload mode. Good luck.
I use the download mode to install the original official rom.
1. Download the LG MOBILE SUPPORT TOOL by this link:http://www.lg.com/us/support-mobile/lg-V500-White
2. install the software in computer, Plug in USB cable with computer, Open the software LG MOBILE SUPPORT TOOL.
3. Turn off Pad and unplug.
4. press hold both volume up and volume down, Then plug in usb cable, And then pad is in downlaod mode
5. USB driver will be insatlled automatically
6. In LG MOBILE SUPPORT TOOL, click option---.country and language-OK, then click option--upgrade recovery
7. It will installe original official rom automatically.
8. After about 1.5 hours, The pad will be installed the last official room.
^ This is a quote and now I shut down the thread, sorry, don't know who said it, just got stoked when I saw it.

thanks, the tool is downloading the rom. hope its works.
// it worked thanks a lot, will try to flash cm 11 tomorrow again.

blazze11 said:
thanks, the tool is downloading the rom. hope its works.
// it worked thanks a lot, will try to flash cm 11 tomorrow again.
Click to expand...
Click to collapse
That is GREAT!
Now remember mate, clear DATA in TWPR, not system.. Never system. Clear only data/factory reset, then just flash CM 11. Nothing else is needed. Remember to install superSU from market after you get booted, otherwise root will not work. Update Binary in SuperSU.

Okay thanks for your help. Its so stupid that there is no key combination for recovery.
I will use your advice and try it later.

blazze11 said:
Okay thanks for your help. Its so stupid that there is no key combination for recovery.
I will use your advice and try it later.
Click to expand...
Click to collapse
Agreed.

blazze11 said:
Okay thanks for your help. Its so stupid that there is no key combination for recovery.
I will use your advice and try it later.
Click to expand...
Click to collapse
There is...
With device powered off do this...
Hold volume key down and press and hold power button.
When LG Logo appears let go of just the power key while still holding the volume key down and then press power key again and volume up while still holding down the volume key.
You get to the factory reset screen and just keep pressing power until you get into recovery.

AndroidUser00110001 said:
There is...
With device powered off do this...
Hold volume key down and press and hold power button.
When LG Logo appears let go of just the power key while still holding the volume key down and then press power key again and volume up while still holding down the volume key.
You get to the factory reset screen and just keep pressing power until you get into recovery.
Click to expand...
Click to collapse
Okay, i will try it next time. Everything is working right now.
Thanks

[Q] How to enter recovery mode using key combination?

I can use "adb reboot recovery" to enter TWRP 2.7 recovery mode, but I want to use key combination, please tell me how to that.

Hold Power + Vol Down > Wait until LG Logo pops up and release from both buttons > quickly hold Power + Vol Up + Vol Down again
It will pop up with some message about reset to factory settings, but it's all a bluff.
Hit Power x3 times to confirm and you'll get to TWRP recovery

Thanks, it works.
actually I enter this factory reset mode before, but i just don't know it a "fake".

so will this erase all data or not?

Jasiekor said:
so will this erase all data or not?
Click to expand...
Click to collapse
That will depend on whether you've installed TWRP or not.
If you've still got the original recovery it will wipe it like it says it will, if you've got a custom recovery it will take you to it.
The standard recovery isn't a recovery like you're expecting it to be, if just has a way of resetting things to default without allowing you to do anything extra. OEM don't like giving people options but want a way to reset to defaults that the customer can use before needing to return a faulty unit which might not be faulty. If that makes sense.

Pman said:
Hold Power + Vol Down > Wait until LG Logo pops up and release from both buttons > quickly hold Power + Vol Up + Vol Down again
It will pop up with some message about reset to factory settings, but it's all a bluff.
Hit Power x3 times to confirm and you'll get to TWRP recovery
Click to expand...
Click to collapse
Thought I'd lost recovery after flashing the lp rom. Sorry for the bump! Many thanks and lol at the 'bluff' factory reset!

Fullmetal Jun said:
Thought I'd lost recovery after flashing the lp rom. Sorry for the bump! Many thanks and lol at the 'bluff' factory reset!
Click to expand...
Click to collapse
No problems, happy to help

Fullmetal Jun said:
Thought I'd lost recovery after flashing the lp rom. Sorry for the bump! Many thanks and lol at the 'bluff' factory reset!
Click to expand...
Click to collapse
From what I can tell, it's not a "bluff". It seems that the stock recovery partition would just automatically do a factory reset, so it warns you before booting the recovery partition. Seeing as you're non-stock, it just boots into TWRP/CWM. It's a valid warning that's simply set up in a weird way.

i hard rest my lg stylo but when i did it erased all my key comob how did i get them back

crystalgirl20977 said:
i hard rest my lg stylo but when i did it erased all my key comob how did i get them back
Click to expand...
Click to collapse
You don't.
We'll you might be able to but you're going about it the wrong way.
First you need to find the right forum for your device, then you read, followed by more reading.
At some point you've hopefully discovered that you should have done all this reading before you reset your device.
Also before pressing the post button on your next post, read it first to make sure it makes sense.

Thank you very much, I tried other combinations found on some web pages that failed. This one worked!

Issue remains.
Pman said:
Hold Power + Vol Down > Wait until LG Logo pops up and release from both buttons > quickly hold Power + Vol Up + Vol Down again
It will pop up with some message about reset to factory settings, but it's all a bluff.
Hit Power x3 times to confirm and you'll get to TWRP recovery
Click to expand...
Click to collapse
I got myself in a pretty bad situation. I have the stock rom. I am trying to get that back using recovery but it's not working. Only factory reset screen. This tablet stopped working in 2015. It cannot write ANY data ANYWHERE. Can't take pics, Can't take screenshots, Can't download apps. Nothing. I really want my tablet back... :/

CharaGloom said:
I got myself in a pretty bad situation. I have the stock rom. I am trying to get that back using recovery but it's not working. Only factory reset screen. This tablet stopped working in 2015. It cannot write ANY data ANYWHERE. Can't take pics, Can't take screenshots, Can't download apps. Nothing. I really want my tablet back... :/
Click to expand...
Click to collapse
I'm probably not the best person to help, however if you put a new post up with more details on what you have access too, the community will be able to help out.

CharaGloom said:
I got myself in a pretty bad situation. I have the stock rom. I am trying to get that back using recovery but it's not working. Only factory reset screen. This tablet stopped working in 2015. It cannot write ANY data ANYWHERE. Can't take pics, Can't take screenshots, Can't download apps. Nothing. I really want my tablet back... :/
Click to expand...
Click to collapse
Install LG software on your computer first. Then with the tablet completely off, hold VolUp and plug the tablet into the computer. That will enter LG download mode. Use the LG software on your PC to install the latest firmware available for your device. From there you can use the guides on this forum to go custom if you so desire.

815 unlocked maybe brick anyone can help me

help needed here, i was using a rooted stock image, and last night i saw the post about upgrading to MM:http://forum.xda-developers.com/g4/d...s-kdz-t3232282
but as i followed the instructions the device turned off before i flashed the system, so i installed boot modem and bootloader but couldnt get system installed and now it stays at the lg logo...with a burning led blink.
i tried using kdz file but i get a few errors,
1- connection to server failed. (i know move msg box but at 9% it completely stops)
rollback impossible saw this error
can someone help me with my lg h815 unlocked
i tryed hard reset i have acces but after the android guy . 1 seconde and that cut all .
i have not access at twrp anymore etc etc
is not the first time that i use flashtool . but here impossible to make something
i tryed to much solution . use 2.0 usb . use windows 10 and 7 by workstation . used different driver . if someone can help me bcz i try since 1 day . and impossible to make something

no one had this problem and found a solution?

So you can get into download mode?

R.Suave said:
So you can get into download mode?
Click to expand...
Click to collapse
i have the dowload mod but when i use it .. after 9% that ask me to remove the battery ... unplug etc etc . nothing work .. i tryed usb 2...usb 3 ... different windows ... different kdz files ... hard reset ... very all ...

I had a similar issue but was able to get into recovery mode and restore a backup.
Can you get to recovery like this
Power Down the LG G4
When Off, Press and Hold the Volume Down and Power Buttons at the Same Time
Continue Holding These Two Buttons Until You See the LG Logo
When You See the LG Logo, Let Go of the Volume Down and Power Buttons for 1 Second
After 1 Second has Passed, Immediately Start Holding the Power and Volume Down Buttons Again
Continue Holding These Two Buttons Until You Boot Up into the LG G4 Recovery Mode

Charles Collins said:
I had a similar issue but was able to get into recovery mode and restore a backup.
Can you get to recovery like this
Power Down the LG G4
When Off, Press and Hold the Volume Down and Power Buttons at the Same Time
Continue Holding These Two Buttons Until You See the LG Logo
When You See the LG Logo, Let Go of the Volume Down and Power Buttons for 1 Second
After 1 Second has Passed, Immediately Start Holding the Power and Volume Down Buttons Again
Continue Holding These Two Buttons Until You Boot Up into the LG G4 Recovery Mode
Click to expand...
Click to collapse
i told you nothing work i cant go in recovery mode with this option . and hard reset doesnt work too ... im blocked

Hi I'm sorry if you've already said you can't get into recovery mode or anything but when i bricked my g4 i used the lg flash tool to flash h815 10c stock and then instead of flashing the latest twrp (the blue themed one) i flashed the one before it which is 2.8.6.1 and it worked perfectly so if you manage to get into recovery or fastboot then try and flash that version of twrp instead , good luck buddy...

Xceeder said:
Hi I'm sorry if you've already said you can't get into recovery mode or anything but when i bricked my g4 i used the lg flash tool to flash h815 10c stock and then instead of flashing the latest twrp (the blue themed one) i flashed the one before it which is 2.8.6.1 and it worked perfectly so if you manage to get into recovery or fastboot then try and flash that version of twrp instead , good luck buddy...
Click to expand...
Click to collapse
yes maybe but trust me is not the first time i made flash . i flashe my phone since 7 years . first time i have this problem . i go in lgviet.com . and a lot of people have the same problem . i cant flash with the kdz method i have android 6.0 and for the moment the rollback its impossible

hi..pls look my video.!
my brick phone.. LG G4
Can you tell me what to do to restore it..??: I can not put it in download mode ....can someone help me. ??
confused:
https://www.youtube.com/watch?v=6CZSaG6h4rE&feature=youtu.be

alxioa said:
hi..pls look my video.!
my brick phone.. LG G4
Can you tell me what to do to restore it..??: I can not put it in download mode ....can someone help me. ??
confused:
https://www.youtube.com/watch?v=6CZSaG6h4rE&feature=youtu.be
Click to expand...
Click to collapse
How did you "brick" (it's not) it? Kill switch is an anti theft feature, usually triggered remotely by the user.

Charles Collins said:
I had a similar issue but was able to get into recovery mode and restore a backup.
Can you get to recovery like this
Power Down the LG G4
When Off, Press and Hold the Volume Down and Power Buttons at the Same Time
Continue Holding These Two Buttons Until You See the LG Logo
When You See the LG Logo, Let Go of the Volume Down and Power Buttons for 1 Second
After 1 Second has Passed, Immediately Start Holding the Power and Volume Down Buttons Again
Continue Holding These Two Buttons Until You Boot Up into the LG G4 Recovery Mode
Click to expand...
Click to collapse
This button combo you posted is wrong any way...you only release power for 1 sec and continue holding vol down and the re press power

I cut and pasted those instructions from another site. They held me back from fixing my phone for hours until I discovered the method you have mentioned. I haven't seen any site that tells us to do it like you said, I just was trying different ways and then hey presto!! it worked.

Charles Collins said:
I cut and pasted those instructions from another site. They held me back from fixing my phone for hours until I discovered the method you have mentioned. I haven't seen any site that tells us to do it like you said, I just was trying different ways and then hey presto!! it worked.
Click to expand...
Click to collapse
when you do this that doesnt work that work only if you let your finger on volume down and not on power 1 second and put again on power . you go in factory reset ... ys and yes and if you are luckily recovery mod