Database Users

not able to flash factory image!

hey guys,
after a long day og non-success i really need your help here.
i tried to do a factory image restore as described here: http://forum.xda-developers.com/showthread.php?t=1907796
Everything worked fine until it came to the point of flashing the image (fastboot -w update image-nakasi-jop40c.zip). as you can see on screenshot1 it stops working at step "sending system" (i´ve been waiting for 2 hours, nothing happened).
also tried the same procedure with nexus 7 toolkit and nexus root toolkit, but here the same problem mentioned above occurs when "sending bootloader" (see screenshot2).
all in all here is what i´ve got:
working unlocked bootloader (4.13), stock recovery and fastboot - but no system
i hope there´s all the information you need right now and anyone can help me out of this misery.
thanks!

Take a look at this video; it describes everything you need to learn how to use the Nexus 7 Root Toolkit: http://www.youtube.com/watch?v=sK9avekmA1c
Once you figure it out you will also be able to flash the stock ROM to your tablet.
boerni2k said:
hey guys,
after a long day og non-success i really need your help here.
i tried to do a factory image restore as described here: http://forum.xda-developers.com/showthread.php?t=1907796
Everything worked fine until it came to the point of flashing the image (fastboot -w update image-nakasi-jop40c.zip). as you can see on screenshot1 it stops working at step "sending system" (i´ve been waiting for 2 hours, nothing happened).
also tried the same procedure with nexus 7 toolkit and nexus root toolkit, but here the same problem mentioned above occurs when "sending bootloader" (see screenshot2).
all in all here is what i´ve got:
working unlocked bootloader (4.13), stock recovery and fastboot - but no system
i hope there´s all the information you need right now and anyone can help me out of this misery.
thanks!
Click to expand...
Click to collapse

thanks for your answer but this is not helpful. the problem is not that i dont know how to use the tools but somehow the flashing process stops at the points mentioned above and i cant explain why

Maybe your downloaded factory image is corrupted somehow? You could try re-downloading and/or flashing the system.img separately:
fastboot flash system system.img

i already tried that and also let the toolkits download the images themselves but still no success.
when flashing the system.img seperately it still just says sending system.img but nothing happens
trying to flash an older bootloader also failed due to the same problem

Try different cable/USB port/PC. Sounds unlikely but you'd be surprised.

Looks like the 4.13 bootloader has a serious issue with receiving and then flashing data, I keep reading about this....

dave_uk said:
Try different cable/USB port/PC. Sounds unlikely but you'd be surprised.
Click to expand...
Click to collapse
holy cow. it´s always the simple things in life that really matter right? although i already tried different usb ports, there were still others to try and finally it worked!
thanks man! problem solved

boerni2k said:
holy cow. it´s always the simple things in life that really matter right? although i already tried different usb ports, there were still others to try and finally it worked!
thanks man! problem solved
Click to expand...
Click to collapse
Had a very similar situation myself a couple of days where I thought I'd completely murdered by days-old Nexus 7 3G and switching flaming USB ports sorted it. Annoyance and relief in equal measure! Glad it worked for you.
D

flash write failure

Dear guys,
due to problems within this morning, i restarted my phone to wipe dalvik/cache.
But it occured that TWRP somehowe needs to have a password (which i didn't ever set though).
Didn't boot up at all now. Even with toolkit no chance to do anything with the device.
Any further suggestions/ideas?

Try flashing the factory image without using a tool kit. Google nexus 4 factory image. Download it to your pc and extract it. Run the flash-all.bat you'll find in there.
Sent from my Nexus 5

r4ff0r said:
Dear guys,
due to problems within this morning, i restarted my phone to wipe dalvik/cache.
But it occured that TWRP somehowe needs to have a password (which i didn't ever set though).
Didn't boot up at all now. Even with toolkit no chance to do anything with the device.
Any further suggestions/ideas?
Click to expand...
Click to collapse
Some Partitions of the phone have got some bad blocks causing it to act in such a way !! Seems RMA(if available) is the best recourse since there is no definative solution to this problem !! You can try hard reboot as well as someone once pointed out that his n4 magically restored during it but others dint have that much of luck !! Also u could give LGNPST a try but since that also writes the partition it is highly unlikely to get you through !! One Solution I know will surely work is Qualcomm PST using the HighSpeed USB Device . But unfortunately we need an expert help, probably a Qualcomm employee to get in touch with since the tool has still not been cracked by anyone for n4 though I read somewhere that someone was able to restore using QPST !! Also mostly a JTAG Repair can help you but thats a rip off !! I'll anyday prefer a official LG/Google Repair over a JTAG !!
Hope you find my post useful !!

THanks Guys,
JD5, it didn't work.
Corresponding to Nabendu's post i guess it is the issue mentioned here.
http://forum.xda-developers.com/nexus-4/help/dead-nexus-4-strange-advice-welcome-t2259334
So therefore i don't see any chance :-/

r4ff0r said:
THanks Guys,
JD5, it didn't work.
Corresponding to Nabendu's post i guess it is the issue mentioned here.
http://forum.xda-developers.com/nexus-4/help/dead-nexus-4-strange-advice-welcome-t2259334
So therefore i don't see any chance :-/
Click to expand...
Click to collapse
I was afraid of that. Try one thing. Relock the bootloader, fastboot oem lock, then re-boot and see if the bootloader locks. If it doesn't, and it probably won't, then rma is your option.
Edit, haha, I just read that thread you posted and they tried the same thing
Sent from my Nexus 5

i was already trying that. at first it seems that the bootloader got locked again but right after restart it is already unlocked again.
I guess RMA will cause problems due to the fact that it was a rooted Nexus, using a custom rom.

r4ff0r said:
i was already trying that. at first it seems that the bootloader got locked again but right after restart it is already unlocked again.
I guess RMA will cause problems due to the fact that it was a rooted Nexus, using a custom rom.
Click to expand...
Click to collapse
Google seems to have been pretty good with rma's when it's a hardware failure. Pretty sure your emmc is borked. But you never know until you send it in. Hopefully there won't be a problem.
Sent from my Nexus 5

Ok I'll give it a try on monday. But as far as i know, i'll need to call them first.
I could imagine that they'll try to let me wipe my data or give me any kind of instructions to see if they can resolve the problem right away? What do i tell them?
At latest when they'll lead me to the recovery i'll get stuck using TWRP at latest.
Any kind of conversation dialogue i can follow up?

Let's try one more thing, inside the factory image is a zip file, extract that. In there is recovery.img. Put that file in the same folder as fastboot.exe. In fastboot try fastboot flash recovery recovery.img
If it works it'll put the stock recovery on.
Sent from my Nexus 5

Nope, same issue " flash write failure"
I can't get any kind o access...
But don't leave any more thoughts on it. Won't work though, i won't want to bother you all the time

jd1639 said:
Let's try one more thing, inside the factory image is a zip file, extract that. In there is recovery.img. Put that file in the same folder as fastboot.exe. In fastboot try fastboot flash recovery recovery.img
If it works it'll put the stock recovery on.
Sent from my Nexus 5
Click to expand...
Click to collapse
It won't let you flash that either to the best of my knowledge !! Just don't tell those operators that you have unlocked your bootloader and have a custom recovery !! Basically they won't tell u to go into stock recovery !! They'll just ask you hard reset the phone using physical keys !! Bdw check my pm !!

r4ff0r said:
Nope, same issue " flash write failure"
I can't get any kind o access...
But don't leave any more thoughts on it. Won't work though, i won't want to bother you all the time
Click to expand...
Click to collapse
Np, not sure what to tell them. It still boots I assume so you can't tell them it won't boot. I guess just the truth, it is a developer phone after all so it should be flashable
Sent from my Nexus 5

[Noob friendly] Basics about the G2 (bootloader, rom, etc.)

Some basics - About bootloader, kernel, recovery, rom, /system and some other partitions.
There are many noobs out there and sometimes even I am one. Two days ago @Closed Force asked me, where I know my stuff from and why things are like they are... So I finally decided to write this little guide about how Android devices basically work and what are the special things about our G2.
If you find wrong facts or any other mistakes (grammatical, language, contentwise), please bear with me. That's how I read it in the forums. And of course not everything written on XDA is correct. So please tell me by PM, or by posting in this thread if you have additions, corrections or any other concerns about this OP.
Where I got to know all this stuff? Reading, reading, reading. I first started modding my old HTC desire like 4 years ago. Since then and even before I'm reading. Mainly here on XDA but also on some german forums and wikis. It might have taken me easily 200 hours or more. So the only way to learn for a newbie (and everyone else too) is reading.
Personally I own a D802 variant. I know about some things that were different in details for the US variants, but things should be right as they are.
Finally thanks to
@d00lz for some extra research/additions and a quick read through.
@Art Vanderlay for some additions.
So let's get started:
When you press the power button, your device will load the Bootloader. The Bootloader afterwards wil load either the Recovery Image (recovery.img), the Kernel (boot.img) or the Download Mode Bootloader (laf.img), depending on the keys you press. At the moment there are three different bootloaders; The Jellybean one, the KitKat one, and the new Lollipop one. Not one of these Bootloaders can be unlocked yet, so there are workarounds which allow us to boot custom ROMs (specifically Kernels, but more about that later) and custom Recoverys. At the beginning there was the Jellybean Bootloader. The Developers (sorry, I don't know which ones) found out how to get around the locked Bootloader pretty early. They called this workaround Loki. It's intergrated into nearly every ROM except the ones which require the KitKat Bootloader (but that's usually not the reason they don't support the JellyBean one). Anyways, soon the KitKat update came and so did the new KitKat Bootloader. Sadly, LG patched the Loki exploit with this new update. However, the Developers found a new way to get the Bootloader booting files which weren't signed by LG. They called this workaround Bump. Bump basically imitates the LG signature so the bootloader thinks this file was really signed by LG. Obviously this workaround works with the JellyBean Bootloader too. In the Lollipop Bootloader this exploit has been closed and no one knows how to get around the new Bootloader, yet. In conclusion to Bootloaders, as long you have a working Bootloader, your device is not dead. You can usually recover it in some way.
The G2 has about 30 partitions (for a more detailed explanation, look here, thanks @d00lz). Each partition has its own purpose. One of them is the Recovery partition. Imagine: A Recovery partiton and a working Bootloader are everything you need to keep your phone working. It's kind of an Operating System in itself, completely independent from Android or anything else stored on your Mobile. The great thing about the Recovery partition is that it's so small that it can be run directly in the RAM. This means it's capable of modifing EVERY goddamn partition on your Mobile, including the Bootloader and the Recovery partition itself (means you can flash a new recovery.zip in your current recovery). Attention: if you are using the Recovery with a 4.4 KitKat Bootloader, it needs to be a Bumped Recovery. If it isn't bumped the Bootloader realizes that the Recovery is not genuine and generates a "Secure Boot Error".
Same thing goes for the Kernel. The Kernel is located in your /boot partition (found gzipped inside your boot.img) and is loaded by the Bootloader when you only press the Power Button and you let your Mobile boot normally. This is the reason why your Kernel also needs to be Bumped if you want to get your system booting on a KitKat Bootloader. When 4.4 KitKat came out, most Developers switched over to using LG's 4.4 KitKat sources for their projects. After a while it was realized that 4.2 JellyBean sources were a lot more reliable for AOSP baed ROMs. This is why most AOSP ROMs use the 4.2 JellyBean Bootloader and the 4.2 JellyBean Kernel sources while Stock based ROMs use the 4.4 KiKat Bootloader and 4.4 KitKat Kernel. There are different Kernels for AOSP ROMs and for Stock based ROMs. This is because Stock Kernels support some ROM functionalities that AOSP ROMs don't have, for example; Knock Code. (Note: Knock Code isn't open source, which is also another big reason why it isn't available for AOSP ROMs.) So there are huge differences between Stock and AOSP based ROMs/Kernels. The Kernel (without factoring in the AOSP and Stock issue) can be switch at anytime you want.
Now about the /data partition... All your personal stuff, including Apps, System Settings, App Data and so on will be stored there. The reason why you should clear it every time you change the ROM is that there are many variables set by the ROM you are coming from. Your current ROM may have some tweaks the new one doesn't have which means the new ROM doesn't know how to handle them which leads to crashes and instability.
Now let's get to the ROM... Having a 4.2 JellyBean Bootloader and a 4.2 JellyBean Kernel doesn't mean the top layer has to be 4.2 too. Most of the AOSP based ROMs are based on Googles KitKat or Lollipop sources. And this is true KitKat or Lollipop, with all its functionalities. Those huge version differences cause some problems in development. No wonder some things do not work properly today, but it's still the best working combination at the moment. It's kind of a wonder how it works as it is, but let's be happy with it. I'm very curious how AOSP ROMs with Lollipop Kernel sources will work. Your ROM and your entire existing Operating System is found in the /system partition. This is why it's the main partition which is modified while flashing. Which partitions will be modified and (how) is written in the updater-script file of the file you're going to flash. Theoretically, running a updater-script of a ROM which changes the Bootloader (/aboot partition) can brick your device. That's also the reason why you should only flash stuff made for your device only!
As already said an updaterscript can modify every partition through the recovery. All ROMs bring their own kernel, so you basically don't have to care about it, except you want to use a non-bumped ROM (with kernel) together with the KitKat bootloader.
Finally something about the baseband/modem (these terms are interchangeable). I noticed that the Developers or rather the Original Posters sometimes don't know which baseband the user should use with the ROM. In earlier days the wrong baseband could make the ROM bootloop. Today most ROMs work with most basebands. It's obviously best if you stay on the one you currently are on and just flash another one if something doesn't work (auto-rotation for example). The baseband can be flashed at any time and is on it's own partition.
Okay Download Mode time. It's part of the laf partition (laf.img). This partition is used by LG and it's PC software to recover the phone and bring it back to Stock. It's a partition in itself, but not completely independent of the Bootloader. It's because of this that you can of course have a fully working Bootloader, but a dead Download Mode. This means you will not be able to flash a .KDZ/.TOT file the next time you are in big trouble! ^^
Okay to wrap up I should mention the EFS partition. The EFS partition stores your device's IMEI (and the serial number as far as I know) of your device. NEVER wipe it. With a empty EFS partition you can use your mobile as a brick, ok maybe you can use it as a media tablet, but that's it (WiFi still works, @Art Vanderlay tested; see below).
Again: if you got questions/additions/correction or see a mistake, post below, or PM me, I'll edit this post...

reserved

Great post. A thread like this should be the first thread you read as soon as you enter the LGG2 sub forum.
Expect a private message soon.
Also, reserved for possible future additions .

d00lz said:
Great post. A thread like this should be the first thread you read as soon as you enter the LGG2 sub forum.
Expect a private message soon.
Also, reserved for possible future additions .
Click to expand...
Click to collapse
And you could modify your signature now^^

Sunandroid said:
And you could modify your signature now^^
Click to expand...
Click to collapse
Nice write up Sunny. You can credit Dan Rosenburg for creating loki. I can also confirm that wifi still works without modemst1 and modemst2 aka efs. My phone suffers for this thread.

@Sunandroid
Perfect! This was all I was looking for. Now I finnaly understand how my G2 works and I'll most likely not need to ask more "noob questions" in this matter.
But I would like to ask some questions because I've left with doubts after reading the OP.
As long as I have /recovery/ and /aboot/ working, I can recover my device exclusively with software. Is this right?
I've concluded that you need /aboot/ to be able to enter in /recovery/ and with recovery you can mess up with any other partition.´
How can I tell if /modem/ found here is compatible with my device? Are all /modem/ partitions the same in the same models? For example, I'm from Portugal so I have a Portuguese D802 LG G2 (if I type its IMEI in a site, it recognizes it as portuguese). If I flash a German D802 modem or English or even American, considering that they are all from D802 would they work flawlessly with my device?
Why does /modem/ cause auto-rotation to work? What exactly is /modem/?
I have a backup of all the partitions in my laptop (made via TWRP). But what happens if I accidentaly lose my /efs/ partition? Can I flash another phone's /efs/?

Rayaxe said:
@Sunandroid
Perfect! This was all I was looking for. Now I finnaly understand how my G2 works and I'll most likely not need to ask more "noob questions" in this matter.
But I would like to ask some questions because I've left with doubts after reading the OP.
As long as I have /recovery/ and /aboot/ working, I can recover my device exclusively with software. Is this right?
I've concluded that you need /aboot/ to be able to enter in /recovery/ and with recovery you can mess up with any other partition.´
How can I tell if /modem/ found here is compatible with my device? Are all /modem/ partitions the same in the same models? For example, I'm from Portugal so I have a Portuguese D802 LG G2 (if I type its IMEI in a site, it recognizes it as portuguese). If I flash a German D802 modem or English or even American, considering that they are all from D802 would they work flawlessly with my device?
Why does /modem/ cause auto-rotation to work? What exactly is /modem/?
I have a backup of all the partitions in my laptop (made via TWRP). But what happens if I accidentaly lose my /efs/ partition? Can I flash another phone's /efs/?
Click to expand...
Click to collapse
Glad I could help you this way...
about /aboot and /recovery: yes you are right. It is even better, if you have an intact laf too. That's the download mode. But as long the other two work, you can fix the laf partition easily. But if you get into the situation, that only those two are working, better don't flash a bootloader (=/aboot). If it's the wrong one your device is bricked.
Aboot is the key to your device. Everything else is fixable. At least with a little bit of knowledge and time. But better don't try it out.
No, the modems are not all the same. There are (sometimes depending on the branding) extremely small differences between the basebands/modems. I personally never had the problem, that I couldn't get any connection at all. But that's not fatal. Just flash another one and try again if it works. Btw: I once made a test in some german forums with different KK basebands. I'm not sure anymore, but the differences were minimal and I think killed my connection totally.
If you loose your efs stuff, your device is a brick with extended functionalities. The IMEI and some other data stored in the efs partition is worldwide unique. So you can't just pick the one of another phone (except the other G2 is bricked or whatever). You need the IMEI for general network connection. So it will still boot up, but you won't be able to text or call anyone with this phone.

Okay ^^
So this is a full backup of all the needed partitions right? http://prntscr.com/76edu4
Should I convert these files to something like .img to be able to flash in the phone just in case I get something that disables my TWRP access?

Rayaxe said:
Okay ^^
So this is a full backup of all the needed partitions right? http://prntscr.com/76edu4
Should I convert these files to something like .img to be able to flash in the phone just in case I get something that disables my TWRP access?
Click to expand...
Click to collapse
Yeah, I guess so. As long as you ticked everything when you backed up (with blastagators TWRP!; the official one doesn't allow to backup the efs stuff), this should be fine.
Well you could. But tbh I have no idea how to convert those files into .img files. But it isn't necessary anyways: It's unlikely that you loose the efs data on your phone unless you brick it somehow. If the phone stays recoverable, The first thing you are going to do is: flashing bootloader, laf and boot.img. Then you will go back to stock through the download mode. Once you've done this it's an easy one to install twrp again and restore the efs backup. No one is gonna flash ~32 partitions by hand. There are "easier" and more usefull ways to recover the device.
Oh and btw: no backup contains the bootloader, laf and boot (recovery developer don't implement this for some reasons). But this doesn't matter. The only thing you really need is the efs backup (which partitions exactly you can see here). Everything else isn't unique and can be extracted out of kdz files and restored this way.
Edit: the two partitions mentioned here are

Sunandroid said:
Okay Download Mode time. It's part of the laf partition (laf.img). This partition is used by LG and it's PC software to recover the phone and bring it back to Stock. It's a partition in itself, but not completely independent of the Bootloader. It's because of this that you can of course have a fully working Bootloader, but a dead Download Mode. This means you will not be able to flash a .KDZ/.TOT file the next time you are in big trouble! ^^
Click to expand...
Click to collapse
My PC doesn't install any driver when my phone is on download mode,
On recovery mode (twrp) i have MTP access but on download mode i'm not having any access,
does that mean my download mode is dead?

GoPogoOreo! said:
My PC doesn't install any driver when my phone is on download mode,
On recovery mode (twrp) i have MTP access but on download mode i'm not having any access,
does that mean my download mode is dead?
Click to expand...
Click to collapse
This has nothing to do with this thread here. The issue is different. But I have no clue what it might be... If I can elaborate a maybe working answer I'm gonna answer you in the noob thread.

Sunandroid said:
This has nothing to do with this thread here. The issue is different. But I have no clue what it might be... If I can elaborate a maybe working answer I'm gonna answer you in the noob thread.
Click to expand...
Click to collapse
Oh btw i tried your (noob friendly) no download mode, no recovery mode ..... using slax,
when i typed ls /dev/sd* it's only showed my PC (only one sda) and there is no sdb, not even one
Weirdly i can access TWRP, but i can't make any custom rom boot,
Man this is frustating

I have a phone, G2 D802 Int., which probably has a corrupt EFS partition. I guess the owner broke it flashing incompatible things into it. As a result of the corruption, ESN/IMEI is lost. It shows null. But very interestingly, the EFS partition mustn't have been wiped because by chance of a boot among a hundred, it shows up the ESN. If by chance you come across to ESN, everything operates normally. And if you reboot the phone, ESN is gone again..
I managed to make recovery work again, by upgrading the phone to lollipop. (It was another time I came across ESN.) But no download mode, USB is never identified (unkonwn usb device), USB modes cannot be changed, unless by chance you come across, USB debugging is no more either.
I was thinking to backup some necessary partitions from a working phone of the same variant, but since it's "unknown device", I cannot query it as a disk. Neither it works in Ubuntu. ls /dev/sd* doesn't show the phone. It even doesn't show the working phone.
Any idea about how I can fix the corrupted EFS partition?

pisisler said:
I have a phone, G2 D802 Int., which probably has a corrupt EFS partition. I guess the owner broke it flashing incompatible things into it. As a result of the corruption, ESN/IMEI is lost. It shows null. But very interestingly, the EFS partition mustn't have been wiped because by chance of a boot among a hundred, it shows up the ESN. If by chance you come across to ESN, everything operates normally. And if you reboot the phone, ESN is gone again..
I managed to make recovery work again, by upgrading the phone to lollipop. (It was another time I came across ESN.) But no download mode, USB is never identified (unkonwn usb device), USB modes cannot be changed, unless by chance you come across, USB debugging is no more either.
I was thinking to backup some necessary partitions from a working phone of the same variant, but since it's "unknown device", I cannot query it as a disk. Neither it works in Ubuntu. ls /dev/sd* doesn't show the phone. It even doesn't show the working phone.
Any idea about how I can fix the corrupted EFS partition?
Click to expand...
Click to collapse
I luckily never had to try it, but scroll down a bit over here: http://www.droidviews.com/how-to-backup-and-restore-lost-imei-on-lg-g2/
I wish you luck!

Sunandroid said:
I luckily never had to try it, but scroll down a bit over here: http://www.droidviews.com/how-to-backup-and-restore-lost-imei-on-lg-g2/
I wish you luck!
Click to expand...
Click to collapse
Yes I know that, but since I cannot take the device to USB debugging mode, it's not the first step I could take. "USB device descriptor is failed", this is what I get when I plug the phone.

pisisler said:
Yes I know that, but since I cannot take the device to USB debugging mode, it's not the first step I could take. "USB device descriptor is failed", this is what I get when I plug the phone.
Click to expand...
Click to collapse
So what is the current state of your phone? You have twrp installed. Can you push stuff through adb when you are in the recovery (this is pretty important, since we maybe can fix the download mode this way)? Does it boot into android?

@Sunandroid, device operates normally except the voice call & data, since these depend on IMEI. The phone boots normally, and everything is working, only the IMEI shows as "null". Additionaly, cannot enter to download mode, no recovery installed, original recovery is working, which is used to do a factory reset only. No USB debugging, it says "USB device descriptor failed". Thus no adb.

pisisler said:
@Sunandroid, device operates normally except the voice call & data, since these depend on IMEI. The phone boots normally, and everything is working, only the IMEI shows as "null". Additionaly, cannot enter to download mode, no recovery installed, original recovery is working, which is used to do a factory reset only. No USB debugging, it says "USB device descriptor failed". Thus no adb.
Click to expand...
Click to collapse
From what I've read about this issue (device descriptor...) just now, it is not software but hardware related.

I've heard of people solving that issue but I couldn't manage to do. Gave the phone to my customer back after 4 days. Importer service put the phone out of warranty and offered him a motherboard replacement for 75 $ and it's pretty fair I think. After all it comes funny when he says he's gonna file a case about returning the phone and take his money back. Well, it's up to him to end up with nothing in hands after months of waiting for a case.
Shortly, this file has been closed without a reasonable solution.
Thanks for your effort @Sunandroid.

pisisler said:
I've heard of people solving that issue but I couldn't manage to do. Gave the phone to my customer back after 4 days. Importer service put the phone out of warranty and offered him a motherboard replacement for 75 $ and it's pretty fair I think. After all it comes funny when he says he's gonna file a case about returning the phone and take his money back. Well, it's up to him to end up with nothing in hands after months of waiting for a case.
Shortly, this file has been closed without a reasonable solution.
Thanks for your effort @Sunandroid.
Click to expand...
Click to collapse
Glad to hear that. Hitting the thanks button doesn't hurt.

Cant flash an OS - "failed to mount partition '/vendor' (invalid argument)"

Hello!
Now, I know this problem is in other threads. But the only reason why I'm posting a new one is if either that thread had died or the solution wasn't applicable to me (it didn't/doesn't work).
So! What happens is when I try to flash a file to the system or vendor I get this error.
Code:
failed to mount partition '/vendor' (invalid argument)
I've tried in TWRP and the bootloader fixes. And now, I currently have no OS.
What I've tried is as follows:
Flashing just the vendor (bootloader/TWRP) - ends with the vendor error.
Flashing .zip ROMs (bootloader/TWRP) - ends with the vendor error.
Trying the usual return to stock procedure - ends with the vendor error.
Repairing partition in TWRP - Says operation completed but the error is still persistent.
Basically. Nothing works because the Vendor partition is unmountable.
What should I do? I have no idea what a fix could be.

Alright, so i've tried some things. I guess I've fixed it but I got a new problem. In the end what fixed it was wiping every parition and rebooting TWRP and then flashing a system image then vendor image. When i say image i mean a manual .img flash instead of a .zip file.
The problem now it that because every was wiped, i no longer have a recovery. When i boot into recovery i get "No command". So now im stuck with stock android 8.1 and a unlocked bootloader that won't do anything. Every time i try and flash a partition i get
Code:
FAILED (data write failure (Too many links))
or
Code:
FAILED (command write failed (No error))
Any tips on getting a recovery installed so i can return to my custom ROM ways.
Thanks for any help in advance.

Nexus Radical said:
Alright, so i've tried some things. I guess I've fixed it but I got a new problem. In the end what fixed it was wiping every parition and rebooting TWRP and then flashing a system image then vendor image. When i say image i mean a manual .img flash instead of a .zip file.
The problem now it that because every was wiped, i no longer have a recovery. When i boot into recovery i get "No command". So now im stuck with stock android 8.1 and a unlocked bootloader that won't do anything. Every time i try and flash a partition i get
or
Any tips on getting a recovery installed so i can return to my custom ROM ways.
Thanks for any help in advance.
Click to expand...
Click to collapse
Try using Nexus root toolkit, I used that today to fix recovery,

jimbomodder said:
Try using Nexus root toolkit, I used that today to fix recovery,
Click to expand...
Click to collapse
Done some research and it seems to be a cable issue of all things with this errors. I bought a new one that should arrive by amazon tomorrow. Will see if that fixes it.
As the nexus toolkit ive been using that a lot. With that i don't even get an error but it never works.

Nexus Radical said:
Done some research and it seems to be a cable issue of all things with this errors. I bought a new one that should arrive by amazon tomorrow. Will see if that fixes it.
As the nexus toolkit ive been using that a lot. With that i don't even get an error but it never works.
Click to expand...
Click to collapse
That's something I have loads of, all seem to connect ok but least you should have it fixed soon.

jimbomodder said:
That's something I have loads of, all seem to connect ok but least you should have it fixed soon.
Click to expand...
Click to collapse
Yeah well, it seemed the cable wasn't the issue. I wouldn't of thought it was myself but yeah. Seems my initial thoughts were right as the cable didn't fix anything. Same errors, same problem. So all my research has lead to nothing. So how can I fix this? I'm out of solutions. I need xposed at least on my phone to be usefull since I can't disable the screen off during calls.

Nexus Radical said:
Yeah well, it seemed the cable wasn't the issue. I wouldn't of thought it was myself but yeah. Seems my initial thoughts were right as the cable didn't fix anything. Same errors, same problem. So all my research has lead to nothing. So how can I fix this? I'm out of solutions. I need xposed at least on my phone to be usefull since I can't disable the screen off during calls.
Click to expand...
Click to collapse
Have you tried wugfresh Nexus tool kit?

Just thought I'd let you know that I have fully restored stock and locked my bootloader, and if I boot recovery I get " no command" too. Seems latest recovery image does f*@k all.

jimbomodder said:
Have you tried wugfresh Nexus tool kit?
Click to expand...
Click to collapse
No, I haven't. BUT!!! I have fixed it...
So the issue that I was having is that I bought a replacement charging board (the PCB for the USB dock.) I replaced it because I had a faulty microphone on it but the USB port was fine. Putting in the old one fixed all the issues I was having. Its meant to be an OEM part so I didn't figure it would be the problem but it was *sigh*... So I take it where I got it from Replacement Base wasn't legit? Ah well, at least my problem is fixed and if anyone gets the same problems they might find this thread.
Thanks for your support thought dude! It was nice to have someone to ask.

Nexus Radical said:
No, I haven't. BUT!!! I have fixed it...
So the issue that I was having is that I bought a replacement charging board (the PCB for the USB dock.) I replaced it because I had a faulty microphone on it but the USB port was fine. Putting in the old one fixed all the issues I was having. Its meant to be an OEM part so I didn't figure it would be the problem but it was *sigh*... So I take it where I got it from Replacement Base wasn't legit? Ah well, at least my problem is fixed and if anyone gets the same problems they might find this thread.
Thanks for your support thought dude! It was nice to have someone to ask.
Click to expand...
Click to collapse
O crap, I got 2 "oem" replacement cameras for my 6p from them and both blurry and don't save pictures,. Glad you fixed it yet.

how to enable Exfat for sd cards on Walmart Onn Tablet (10.1 inch w/ keyboard)?

Hi,
This is my first time trying to root a tablet but managed to unlock the bootloader and install magisk + Edxposed, but was unable to find a module that enabled exfat for the sd card.
Currently it only reads Fat32 formatted cards but I would like to load a 10gb file on there that the device can read.
Any ideas how to go about this? will flashing a custom kernel/ rom help me with this?
All help is appreciated.
Thanks in advance!

rachelld said:
Hi,
This is my first time trying to root a tablet but managed to unlock the bootloader and install magisk + Edxposed, but was unable to find a module that enabled exfat for the sd card.
Currently it only reads Fat32 formatted cards but I would like to load a 10gb file on there that the device can read.
Any ideas how to go about this? will flashing a custom kernel/ rom help me with this?
All help is appreciated.
Thanks in advance!
Click to expand...
Click to collapse
I believe you'd need something like vold-posix, along with a version of magisk modified to inject it
But vold-posix is for Android 8.1, although I believe there is a modified 9 build for Pixels.
I'm not even sure if anyone has gotten any custom roms working on any of these yet, but if they have, might be your only option.

Thanks!
As of now I think I bricked it....
I messed around and accidentally erased the system partition, tried to fix it by flashing the image posted here (https://forum.xda-developers.com/wa...eral/stock-stock-backups-images-otas-t3998227) and now the screen won't turn on, no recovery mode, no adb..... the device is still detected through the SP flash tools though.
I think the image I used wasn't complete - can anyone upload a complete working image (including a scatter file) I don't care if it's stock or custom, just need something working on the device.
Thanks all!

rachelld said:
Thanks!
As of now I think I bricked it....
I messed around and accidentally erased the system partition, tried to fix it by flashing the image posted here (https://forum.xda-developers.com/wa...eral/stock-stock-backups-images-otas-t3998227) and now the screen won't turn on, no recovery mode, no adb..... the device is still detected through the SP flash tools though.
I think the image I used wasn't complete - can anyone upload a complete working image (including a scatter file) I don't care if it's stock or custom, just need something working on the device.
Thanks all!
Click to expand...
Click to collapse
Uploading my WWR backup right now. Kinda slow internet at work so I'll post the link tomorrow morning. Probably around 10am EST. It also has the scatter.
Edit: https://www.dropbox.com/s/pmgbaik485pa9st/ONN%2010KB%20Tablet%20ONA19TB007.zip?dl=0

razredge said:
Uploading my WWR backup right now. Kinda slow internet at work so I'll post the link tomorrow morning. Probably around 10am EST. It also has the scatter.
Click to expand...
Click to collapse
Thanks so much! Will try flashing this when I get home later today

rachelld said:
Thanks so much! Will try flashing this when I get home later today
Click to expand...
Click to collapse
Thanks for posting it, unfortunately it seems that my device was hard bricked and will not turn on anymore - even to the black screen I had before.

rachelld said:
Thanks for posting it, unfortunately it seems that my device was hard bricked and will not turn on anymore - even to the black screen I had before.
Click to expand...
Click to collapse
Is it still detected by the computer? That's really all you need to flash the ROM. I would be careful not to overwrite or format the unit-specific data on the emmc, like nvram, proinfo, persist, etc. I hope those did not get corrupted on your device.

rachelld said:
Thanks for posting it, unfortunately it seems that my device was hard bricked and will not turn on anymore - even to the black screen I had before.
Click to expand...
Click to collapse
Is your computer still detecting it? What specific errors is SFFT giving you? Did you follow the guide HERE?

Appreciate all the help here! I did follow that guide but I believe I messed up when I deleted the internal storage so the flashing did not work...
Either way I have another one to play with as these were super cheap on black friday - does anyone have any ideas for my original question?
I don't mind flashing a custom rom if anyone knows of one that works with this device.

@rachelld, I don't understand what you mean by "deleted the internal storage" (I don't think you can delete the emmc chip ), but these tablets are basically unbrickable as long as you have a backup or at least the device-specific areas remain in the ROM. There is also no secure boot to speak of.

@diplomatic Have no idea what I did but at one point I did hit a Chinese screen and clicked clear Emmc now that you mention it... (At least that's what Google translate told me it meant....)
I am left with a device that won't turn on at all, sp flash tools claims that it flashed successfully but still no response from the power button

@rachelld, what about connecting it to the wall charger?

diplomatic said:
@rachelld, what about connecting it to the wall charger?
Click to expand...
Click to collapse
Nothing doing, no sign of life. Tested the charger with another device to make sure it's working

rachelld said:
@diplomatic Have no idea what I did but at one point I did hit a Chinese screen and clicked clear Emmc now that you mention it... (At least that's what Google translate told me it meant....)
I am left with a device that won't turn on at all, sp flash tools claims that it flashed successfully but still no response from the power button
Click to expand...
Click to collapse
Well no, if you did erase the emmc, then the stock Rom backups shared will not have enough data for you to fully restore from.
And it is not know what partitions can be shared between devices. For example. Secro has device specific data on it. Nvram , also.
So if you have multiple devices. Follow the wwr readback process and fully read back all the partitions from one that works. And flash it back to the bricked one.

rachelld said:
@diplomatic Have no idea what I did but at one point I did hit a Chinese screen and clicked clear Emmc now that you mention it... (At least that's what Google translate told me it meant....)
I am left with a device that won't turn on at all, sp flash tools claims that it flashed successfully but still no response from the power button
Click to expand...
Click to collapse
That's the factory mode, the clear eMMC option should just be another factory reset option.