Database Users

USA 1.141.07 update fix with. .img's

Crsdr37 said:
Alright Guys in the USA. I will be posting the .img files to fix your device or update your device to 1.141.07 if you have either used the chinese update fix or some other various fix that left you with a different boot image. The instructions are simple.
1. Connect your tablet to the computer via USB. Put the boot.img and the system.img on your SD Card. Also put the Update.zip then use a file explorer to move the update.zip to the root of your SD card. Which is external SD. If you use Astro. (Alternatively you can just take your SD card out and put it in your computer to put the update.zip.)
2. You need to first push the boot.img
-Open ADB type su then hit enter. (your device will prompt for superuser you must select allow) Then enter the command below.
dd if=/sdcard/boot.img of=/dev/block/mmcblk0p2 (hit Enter)
3. Then push the system.img
dd if=/sdcard/system.img of=/dev/block/mmcblk0p3
4. Force shutdown your device when those finish (as your screen may not turn on.)Then hold volume - and the power button "until the green android comes up very important do not let them go just because the device turns on" to start the update.zip. Let it finish (Your device will reboot when it completes.
5. Enjoy the fact your device is back to stock and you can now update when future updates release.
To push the files you will need adb shell. If you dont know what that is look it up, It is part of the android development kit. Second these 2 commands will push the files to their proper mount block. You must push the boot.img first then the system.img These files are for the USA update 1.141.07
http://www.megaupload.com/?d=TNDCAYC8 - System.img -MD5-2b4e2fea567ac883bb483fc96b1fdc9d
http://www.mediafire.com/?7b5llkk8bnmnd23 -Update.zip
http://www.mediafire.com/?3qahjh3twi6jc9t -Boot.img -MD5-4477d6739dd1e3b3ba1dbf94be7fe8f0
Here are 2 Mirrors To download the boot.img you will need to download both as the uploader made it a 2 part file making it easier for some countries to download. Give thanks yo ardatdat if these came in handy.
http://www.zshare.net/download/91195486183633a0/
http://www.zshare.net/download/9119547812fdf5fa/
I will check periodically on this thread if anyone has questions or needs Help. Guve a huge shout out to deckofficer54 as he is a co-worker and friend that dumped these files for me when I screwed my system up.
Click to expand...
Click to collapse
** Alright guys I am just posting this link for when you just do the update.zip because you are already on 1.104.05_COM_GEN1 and you have a different kernel then the update.zip, What will happen is when you reboot the tablet from just doing the update.zip you may have WIFI error. These files should resolve that issue. Once again they are only if you have WIFI Error on reboot. To install these you will need some type of file explorer that has rw access to the file system. I rec. Root Explorer. To install these follow these instructions.
1. Copy both modules to your SD card does not matter where.
2. With your File Explorer/Manager Copy both of these files. (Root Explorer will let you multi-select if you hit the menu button.)
3. Navigate to System/Lib/Modules.
4. **This step is very important- You must Mount your System for RW access. If you don't they will not copy. Once you have RW just hit the paste button and then reboot your device.
5. **This step is for anyone still having wifi error after reboot. (Stop being lazy lol and just do all the steps. From the top by mounting the boot.img and system.img that way your device is 100% stock there for no checksum issues.
http://forum.xda-developers.com/attachment.php?attachmentid=601473&d=1305842073 - This is the wifi modules Download Link.
Thank you thor2002ro for posting these on your kernel modules thread. Which is found here for anyone having any other issues.
http://forum.xda-developers.com/showthread.php?t=1058713
Happy Updating
​
Alright guys here is the list of supporters thus far for the unbricking and or updating of your tablet. If I missed someone let me know.
Supporters:
Euclid's Brother -Awesome tool to flash the images Making your lives easier one click at a time. If you want an easier way download these images and use this app https://market.android.com/details?id=com.interphaze.Acer_ROM_Flasher
bhageman -Donation
aerichards1977 -Donation
Sent from my PC36100 using XDA Premium App

thanks so much for this. to verify my build number is 1.141.07_COM_GEN1 is that right?

Success! This worked like a charm! I didn't have to use the recovery img I just used the update.zip.
After update:
Kernel: g9b3ce2b
Build: Acer_A500_1.141.07_COM_GEN1
Good work and thanks!
edit: Actually I guess I do have one issue right now. After the update my wifi stopped working. When I go to the wifi settings I see "Error" under Wi-Fi and the check box is grayed out so that it can't be clicked. Any help?

Had a German 1.112 build i guess, bricked it and revocered it with Acer_A500_1.122.01_EMEA_GEN5. Used boot and system image and then updated and it really works!!! Thank you very very very much!!!
EDIT1: I even not lost my settings and can set the language to German too!!
EDIT2: Root gone (as expected), used Gingerbreak (tab version) and everything works fine.

phone.ds said:
Had a German 1.112 build i guess, bricked it and revocered it with Acer_A500_1.122.01_EMEA_GEN5. Used boot and system image and then updated and it really works!!! Thank you very very very much!!!
Click to expand...
Click to collapse
Your Very Welcome. Took me some time to get all the files but this **** works like a frickin charm. I wish it wasnt such a pain in the ass but hey its fixed.

ryutsuke said:
Success! This worked like a charm! I didn't have to use the recovery img I just used the update.zip.
After update:
Kernel: g9b3ce2b
Build: Acer_A500_1.141.07_COM_GEN1
Good work and thanks!
edit: Actually I guess I do have one issue right now. After the update my wifi stopped working. When I go to the wifi settings I see "Error" under Wi-Fi and the check box is grayed out so that it can't be clicked. Any help?
Click to expand...
Click to collapse
well the only thing I can think of it either the lib modules for wifi are messed up in which case I can post a link with them or the kernel is different. I would use the 2 .img that I posted then use the update zip. That way the images replace your kernel which is always the root cause of wifi errors.

here is a link to the wifi lib modules. You need to use something like root explorer. To mount the system as rw. Then navigate to system/lib/modules and copy those two files into there with the system mounted as rw. Reboot and see if it fixes the issue!!
http://www.megaupload.com/?d=OKU671AP

futty said:
thanks so much for this. to verify my build number is 1.141.07_COM_GEN1 is that right?
Click to expand...
Click to collapse
Yes you are now stock and able to update when they release 3.1

dont we need to flash flexrom.img to be 100% stock?

The flexrom was flashed with the update zip
Sent from my A500 using XDA Premium App

confirmed working as well.

Crsdr37 said:
here is a link to the wifi lib modules. You need to use something like root explorer. To mount the system as rw. Then navigate to system/lib/modules and copy those two files into there with the system mounted as rw. Reboot and see if it fixes the issue!!
Click to expand...
Click to collapse
Am I missing something or did you maybe forget the link =P

Ah **** lol give me 1 second
http://www.megaupload.com/?d=OKU671AP
Sent from my A500 using XDA Premium App

Did those libs help at all?a like I said if they don't the only fix I I now would be to go back to the german or chinese update then flash both. Img then update.
Sent from my A500 using XDA Premium App

Image updates
Maybe some file corruption?! Loaded per the directions and on boot got error:
"Secure Boot Image LNX checksum fail"
Going back to the Chinese Rom.

You get that only when do don't do all three'. Once you reboot after pushing the 2 images. You have to hold down the volume - and the power button it will then run the update zip to complete.
Sent from my A500 using XDA Premium App

Crsdr37 said:
Yes you are now stock and able to update when they release 3.1
Click to expand...
Click to collapse
thanks so much again. you are a god i bet you helped millions by doing this

That was my intentions I came from the evo forums. Everybody there helps each other. Im just hoping people here pick it up and start helping when people have questions.
Sent from my A500 using XDA Premium App

ryutsuke said:
Success! This worked like a charm! I didn't have to use the recovery img I just used the update.zip.
After update:
Kernel: g9b3ce2b
Build: Acer_A500_1.141.07_COM_GEN1
Good work and thanks!
edit: Actually I guess I do have one issue right now. After the update my wifi stopped working. When I go to the wifi settings I see "Error" under Wi-Fi and the check box is grayed out so that it can't be clicked. Any help?
Click to expand...
Click to collapse
Did you ever get wifi working
Sent from my A500 using XDA Premium App

tomlogan1 said:
Maybe some file corruption?! Loaded per the directions and on boot got error:
"Secure Boot Image LNX checksum fail"
Going back to the Chinese Rom.
Click to expand...
Click to collapse
Were u able to get past the checksum error?
Sent from my A500 using XDA Premium App

VS980 won't start up

Accidental OTA on custom rom. I have tried other posts but nothing works so far. Can someone please help.

Does the phone turn on and show LG?
Sent from my LG-VS980 using Tapatalk

lilxman said:
Does the phone turn on and show LG?
Sent from my LG-VS980 using Tapatalk
Click to expand...
Click to collapse
What happens when you use anything in CWM?

SmurFFF said:
Accidental OTA on custom rom. I have tried other posts but nothing works so far. Can someone please help.
Click to expand...
Click to collapse
the link below will allow you to revert back to stock unrooted 11A.
after that you can take the OTA to 12B, reroot via IORoot and then use FreeGee to install recovery of your choice.
This has saved my phone a couple times from me getting too cocky with screwing around with things i don't fully understand but think I do.
http://forum.xda-developers.com/showthread.php?t=2448960

no download mode
WolfmanJack said:
the link below will allow you to revert back to stock unrooted 11A.
after that you can take the OTA to 12B, reroot via IORoot and then use FreeGee to install recovery of your choice.
This has saved my phone a couple times from me getting too cocky with screwing around with things i don't fully understand but think I do.
http://forum.xda-developers.com/showthread.php?t=2448960
Click to expand...
Click to collapse
cant boot into download mode

lilxman said:
Does the phone turn on and show LG?
Sent from my LG-VS980 using Tapatalk
Click to expand...
Click to collapse
it boots straight into cwm usually, sometimes stuck in lg logo

Hmm OK. At work now, I will look into it when I get home. Just throwing this out there cause it caught me, you just press the volume up button, hold it down, then plug in the USB cable with the LG flash tool open and configured. I kept holding the power button down as well.
Sent from my LG-VS980 using xda app-developers app

staticx57 said:
What happens when you use anything in CWM?
Click to expand...
Click to collapse
i tried flashing new rom but says loki not supported or something

WolfmanJack said:
Hmm OK. At work now, I will look into it when I get home. Just throwing this out there cause it caught me, you just press the volume up button, hold it down, then plug in the USB cable with the LG flash tool open and configured. I kept holding the power button down as well.
Sent from my LG-VS980 using xda app-developers app
Click to expand...
Click to collapse
how do i log into flash tool

SmurFFF said:
how do i log into flash tool
Click to expand...
Click to collapse
Reread the thread there is a file you need to replace that corrects that. Uninstall it, reinstall, replace the file and then attempt to open.

WolfmanJack said:
Reread the thread there is a file you need to replace that corrects that. Uninstall it, reinstall, replace the file and then attempt to open.
Click to expand...
Click to collapse
still no download mode

SmurFFF said:
still no download mode
Click to expand...
Click to collapse
Ok man here ya go, did some digging around here and found these two threads that may help you.
First is a means of pushing TWRP via ADB, not sure if that is the answer for you by you never know till you try.
Second is a means of using Ubuntu or a VM to replace the corruption caused by OTA
http://forum.xda-developers.com/showthread.php?t=2449670
http://forum.xda-developers.com/showthread.php?t=2582142
If those do not work either the only other thing I could think to do would be to get on the lg-g2 IRC channel and request help from a dev that is online.

WolfmanJack said:
Ok man here ya go, did some digging around here and found these two threads that may help you.
First is a means of pushing TWRP via ADB, not sure if that is the answer for you by you never know till you try.
Second is a means of using Ubuntu or a VM to replace the corruption caused by OTA
http://forum.xda-developers.com/showthread.php?t=2449670
http://forum.xda-developers.com/showthread.php?t=2582142
If those do not work either the only other thing I could think to do would be to get on the lg-g2 IRC channel and request help from a dev that is online.
Click to expand...
Click to collapse
i have never done an adb before is there any way u could help

SmurFFF said:
i have never done an adb before is there any way u could help
Click to expand...
Click to collapse
There is a pretty detailed guide somewhere on the forum. I will locate it, read through it and add to it if need be bro.

WolfmanJack said:
There is a pretty detailed guide somewhere on the forum. I will locate it, read through it and add to it if need be bro.
Click to expand...
Click to collapse
thanks sorry about all the questions

SmurFFF said:
thanks sorry about all the questions
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=2141817
No worries on the questions man, here is the guide I was talking about. It is pretty straight forward but some areas you may have questions I will let you know what I did.
At one point it talks about setting up system variables or something to that effect. I did not perform this step.
When you open the SDK manager and look at all the packages that are listed it can get a little confusing, for me I just selected all and let the install run it's course. ( took about 20mins ).
Once the install is good it talks about moving a copy of command prompt to the platform tools folder. Not trying to insult your intelligence but it is that simple. Just locate where the .exe for command promt on your computer is, copy it and paste in the platform tools folder.
Once that is done turn your phone on and then plug the phone into your computer. Open the command prompt from the platform tools folder and then type the following:
adb devices
it should populate some brief info about your phone. If not then usb debugging is not enabled on the device. This is why I think this one may not work for you because if it isn't already enabled not sure if there would be a way for you to enable it with the state your device is in, but there are two other ways in the TWRP guide that i already posted about that may work plus the second thread talking about using ubuntu.

WolfmanJack said:
http://forum.xda-developers.com/showthread.php?t=2141817
No worries on the questions man, here is the guide I was talking about. It is pretty straight forward but some areas you may have questions I will let you know what I did.
At one point it talks about setting up system variables or something to that effect. I did not perform this step.
When you open the SDK manager and look at all the packages that are listed it can get a little confusing, for me I just selected all and let the install run it's course. ( took about 20mins ).
Once the install is good it talks about moving a copy of command prompt to the platform tools folder. Not trying to insult your intelligence but it is that simple. Just locate where the .exe for command promt on your computer is, copy it and paste in the platform tools folder.
Once that is done turn your phone on and then plug the phone into your computer. Open the command prompt from the platform tools folder and then type the following:
adb devices
it should populate some brief info about your phone. If not then usb debugging is not enabled on the device. This is why I think this one may not work for you because if it isn't already enabled not sure if there would be a way for you to enable it with the state your device is in, but there are two other ways in the TWRP guide that i already posted about that may work plus the second thread talking about using ubuntu.
Click to expand...
Click to collapse
Ive done everything it said but i cant get it to recognize adb as a command

SmurFFF said:
Ive done everything it said but i cant get it to recognize adb as a command
Click to expand...
Click to collapse
Does it say:
"adb" is not recognized as an internal or external command, operable program or bath file
If so the command promt isnt executing from the platform tools.
attatched is a screenshot of two CMD windows, look at the location listed before where what you type in shows up.
the location on the left is from the cmd opened from the platform tools folder, the one on the right is from opening up command prompt from where it is originally located on my computer. when you open yours compare the locations and let me know what you got.

WolfmanJack said:
Does it say:
"adb" is not recognized as an internal or external command, operable program or bath file
If so the command promt isnt executing from the platform tools.
attatched is a screenshot of two CMD windows, look at the location listed before where what you type in shows up.
the location on the left is from the cmd opened from the platform tools folder, the one on the right is from opening up command prompt from where it is originally located on my computer. when you open yours compare the locations and let me know what you got.
Click to expand...
Click to collapse
im on windows 8 and when i try to find the cmd application i only get a shortcut?

not sure if it differs in windows 8 or not but I know i 7 and older versions it is located C:/windows/system32
also when you copied it did you select paste shortcut or just paste? If you selected paste shortcut that may be your issue, i selected paste and it populates as its own .exe not a short cut. Let me know what you get.

[Guide] How to have write protection disabled on boot with stock rom

For this to work you will need to be rooted with twrp installed.
This is for people who are on the stock rom or a rom without init.d support.
1. Download the wp_mod.ko file from @flar2's thread http://forum.xda-developers.com/showthread.php?t=2701816
and copy it over to your SD card (either internal or external)
2. Boot into twrp
3. Select the "Mount" option on the main menu and tick system
4. Go back to the main menu and then go into the "Advanced" option. There will be a "File Manager" option
5. Navigate to the folder you saved the .ko file in and copy it (just touch the file and it will bring up the menu)
6. now navigate to /system/lib/modules and copy the file there by hitting the "select" button on the bottom right.
7. Navigate to /system/lib/modules and insure the file is there. Now touch it to bring up the menu. select "Chmod" option and enter in 644
8. reboot the device
9. Once booted fully open up Terminal emulator and type:
su
insmod /system/lib/modules/wp_mod.ko
10. Once that's done open up a file manager app with root access and mount as r/w and navigate to /system/etc and look for the file install-recovery.sh
11. edit the file using a text editor, adding the line insmod /system/lib/modules/wp_mod.ko towards the bottom of the file
12. reboot and enjoy r/w on boot without running the command every time
13. profit

I don't have my hands on mine yet (ordered a Dev edition from Amazon), but I greatly appreciate your work here! R/W was a massive pain for me on my M7, and this seems much more simple and easy. Thanks again!

Hi graffixnyc,
Thanks for the explanation, but the link to the file is not working ....

link
flaxjef said:
Hi graffixnyc,
Thanks for the explanation, but the link to the file is not working ....
Click to expand...
Click to collapse
+1
CC

Should be fixed now.. I don't know why it cut off some of it
http://forum.xda-developers.com/showthread.php?t=2701816

Thanks for the turorial, but this isn't working for me
The file can't be executed (even after chmod) - and if i try to execute this file in an other directory, my terminal says that this file can't be found..
Any ideas?
So my device simply ignores Step 7 .... :crying:

graffixnyc said:
For this to work you will need to be rooted with twrp installed.
7. Navigate to /system/lib/modules and insure the file is there. Now touch it to bring up the menu. select "Chmod" option and enter in 644
Click to expand...
Click to collapse
I know I am being a grammar nazi, but I am fairly certain you mean "ensure". I tried to just leave it alone, but I can't not say something. It's a curse.

Fenny said:
I know I am being a grammar nazi, but I am fairly certain you mean "ensure". I tried to just leave it alone, but I can't not say something. It's a curse.
Click to expand...
Click to collapse
It is ironic that a "grammar nazi" would use a double negative while pointing out a grammatical error...

noimjosh said:
It is ironic that a "grammar nazi" would use a double negative while pointing out a grammatical error...
Click to expand...
Click to collapse
lol... yeah, would have been better to say: "but I'm compelled to say something"
Oh well, no biggie though.
Don't know how I missed this thread though, thanks graffixnyc.

noimjosh said:
It is ironic that a "grammar nazi" would use a double negative while pointing out a grammatical error...
Click to expand...
Click to collapse
Indeed, it is ironic.

thank you

412070391 said:
thank you
Click to expand...
Click to collapse
Does this work if the phone is still s-on? (unlocked/rooted but no s-off)

Sorry, but will this fix my little niggling issue with MX player? I keep my Stewart/Colbert files on the extSD card, but I can't delete them when done watching them using MX Player's delete command. I have to remember which files are watched and then use ES File Explorer to delete them. A silly second step in my opinion. Yes I am rooted, s-on, with TWRP.
I'm staying stock hoping a firewater solves my s-on issue, but yes I should probably do a custom ROM to solve this and a few other things.

Will this make SD card writeable to all apps?

Will this make external micro SD card writeable to all apps?

Sn8kbordin said:
Will this make external micro SD card writeable to all apps?
Click to expand...
Click to collapse
MAN, NO DOUBLE POSTS. but yea it should do it...if not there is another way

In Terminal Emulator it says "Failed Exec Format Error". Any ideas?

I followed the 1st post directions without errors for Sense 6.0, Andoid 4.4.3. When I tried to:
1. When I tried editing and saving system/customize/ACC/default.xml in ES File Explorer phone rebooted on save and default.xml went back to stock
2. When I copied default.xml to extSD card, edited it, and tried overwriting system/customize/ACC/default.xml with edited default.xml in TWRP recovery phone also rebooted
I want to do this mod http://forum.xda-developers.com/htc-one-m8/general/enable-built-music-channelroot-t2818128

[FIX] Cant turn WIFI on? You are missing this file

So after lots of flashing of different roms on my Moto G 2nd gen (XT1068) I ended up unable to turn WIFI on in any rom, including stock!
Thing is, after days of breaking my head with this, I figured out I was missing the WCNSS_qcom_wlan_factory_nv.bin file from the /Persist folder.
How did that file go missing and why it was not restored when restoring to stock or flashing roms? Dam good question, I don't have an answer to that yet, BUT, I have a fix.
Simply download the attached .rar, unzip it, and manually put the WCNSS_qcom_wlan_factory_nv.bin file in your /Persist folder using any root explorer / file manager on your device and reboot!
Such a simple little thing gave me so much trouble, hope this will help future users who might face the same problem, as I already saw around that other people are also having the same issue.
This should work for any Moto G version, even the 2013 model, XT1063, XT1064, XT1068, XT1069, all share the same WIFI file.
Happy surfing on your now working WIFI!

Nice Work!

I have that file in /persists but still no WiFi.

Obagleyfreer said:
I have that file in /persists but still no WiFi.
Click to expand...
Click to collapse
Most likely its the perms issue. If you have 'adb' and can connect to the phone using adb, do this:
adb logcat -d -v time | grep "avc: denied"
right after a fresh start. If the file shows up in that grep, it means that you are running into permissions issue. And it can be fixed if you have root.

Where cn i find persist folder... ??? I m using CM12
Sent from my Moto G 2014 using XDA Premium 4 mobile app

immy8796 said:
Where cn i find persist folder... ??? I m using CM12
Sent from my Moto G 2014 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Root of your device,
/persist

Exelios said:
Root of your device,
/persist
Click to expand...
Click to collapse
Found it... Thanx.. bt which permission i hv to give that .bin file.. ???
Sent from my Moto G 2014 using XDA Premium 4 mobile app

immy8796 said:
Found it... Thanx.. bt which permission i hv to give that .bin file.. ???
Sent from my Moto G 2014 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Mine is 777, read write execute to everyone, probably not the right cmod, but it works

after try like 5 kernels and almost start to crying i found this post
AND WORKS!!!!
Thanks you so much!!

ZenKeep said:
after try like 5 kernels and almost start to crying i found this post
AND WORKS!!!!
Thanks you so much!!
Click to expand...
Click to collapse
O yeah I know the feeling, went trough the same, glad I helped!
Also pressing the tnx button on my post would help me!

I already have persist folder and file in root directory and overwrite it with rw-r-r permission but still not working plz help.

HELP!
I have restored to stock firmware, and my wifi just turns off when i turn it on. I think i am missing this file but as im on stock I dont have root access. How can i install this file if i dont have root access.
A quick reply would be amazing!
Thanks

mrangryoven said:
I have restored to stock firmware, and my wifi just turns off when i turn it on. I think i am missing this file but as im on stock I dont have root access. How can i install this file if i dont have root access.
A quick reply would be amazing!
Thanks
Click to expand...
Click to collapse
You could just root again. Using super su you can unroot using the super su app after you finish the fix.
Sent from my XT1064 using Tapatalk

still have the same issue. stock rom and stellar kernel

Thank you man, this really worked!!! You saved my ass!
PS: I have another problem similar to this one. I can' t acces to my mobile network, I have them turned on, but when I press on Network operators, a message pops up saying "Error while searching for networks ". Have you ever encountered this problem? Because I can' t find an answer

sumit227 said:
I already have persist folder and file in root directory and overwrite it with rw-r-r permission but still not working plz help.
Click to expand...
Click to collapse
I also tried to reload the stock boot.iso but that did not help me in this case. In the end what fixed this issue for me was to wipe the phone and load cyanogen mod 12.1.
I downloaded the following files to my phones SDCARD before starting the process below.
cm-12.1-20150816-NIGHTLY-titan-recovery.img
cm-12.1-20150816-NIGHTLY-titan.zip
gapps-5.1-arm-2015-07-17-13-29.zip
0) reboot into fastboot
1) fastboot flash recovery cm-12.1-20150816-NIGHTLY-titan-recovery.img (this was done from the command line on my Mac, and that file was on my Mac at the time)
2) reboot into recovery
3) choose "Wipe data / Factory Reset"
4) choose "Apply Update" -> "Choose From SDCARD1 -> "cm-12.1-20150816-NIGHTLY-titan.zip"
at this point I rebooted but could have probably installed GAPPS right away. The wifi was working again at this point!
5) choose "Apply Update" -> "Choose From SDCARD1 -> "gapps-5.1-arm-2015-07-17-13-29.zip"
I think I will stick with CM for now. I've used it in the past and it was fine.

jreeve0805 said:
I also tried to reload the stock boot.iso but that did not help me in this case. In the end what fixed this issue for me was to wipe the phone and load cyanogen mod 12.1.
I downloaded the following files to my phones SDCARD before starting the process below.
cm-12.1-20150816-NIGHTLY-titan-recovery.img
cm-12.1-20150816-NIGHTLY-titan.zip
gapps-5.1-arm-2015-07-17-13-29.zip
0) reboot into fastboot
1) fastboot flash recovery cm-12.1-20150816-NIGHTLY-titan-recovery.img (this was done from the command line on my Mac, and that file was on my Mac at the time)
2) reboot into recovery
3) choose "Wipe data / Factory Reset"
4) choose "Apply Update" -> "Choose From SDCARD1 -> "cm-12.1-20150816-NIGHTLY-titan.zip"
at this point I rebooted but could have probably installed GAPPS right away. The wifi was working again at this point!
5) choose "Apply Update" -> "Choose From SDCARD1 -> "gapps-5.1-arm-2015-07-17-13-29.zip"
I think I will stick with CM for now. I've used it in the past and it was fine.
Click to expand...
Click to collapse
This also worked for me, loaded the latest CM nightly and Wifi came back. Previous steps outlined in this thread did not work.

Had issues with Moto G2 wifi after rooting.. wotks fine after Blisspop
Tom flash
Sent from my SM-T231 using XDA Free mobile app

pls help
persist folder gets removed every time i put it there using root explorer... when i click add new folder into the / (persist is not there) and type in persist it creates a folder with the files already there then i quit the explorer and come back only to find out the the folder is not shown there anymore but if i created again is gets in there and has all the files but again when i quit it disappears...
---------- Post added at 08:48 PM ---------- Previous post was at 08:25 PM ----------
Tel864 said:
You could just root again. Using super su you can unroot using the super su app after you finish the fix.
Sent from my XT1064 using Tapatalk
Click to expand...
Click to collapse
pls help me i have the folder but its not shown in the explorer it only shows when i add new folder and name it persist but then it disappears again

WiFi turns off instantly I try to turn it on
I have the same issue like you guys, and i've already try to copy the file to the /persist folder, with all the permissions... and nothing but error message pop ups (I can't modify the files in the folder, but accidently I erase one of the WCNSS files. It doesn't make any sense)
I've also tried to install the stock firmware to my XT1068, several ROMs with LP 5.0.2, 5.1, etc (everytime doing wipe cache and data); and the issue is still going.
What can I do? Downgrade to KK can restore all the missing files?
Maybe I can copy a /persist folder entirely with all the files... I don't know.
I'm running out of ideas! And I don't want to live with the idea of 'no-wifi' in such an excellent phone! :crying:
Thanks for your time, guys!

Root ANY LG G4 Variant 100% Success Directives | Root Injection | Less Bricks

Hi everyone. As I found out there's root for the G4 but doing this isn't easy especially if your variant is hard to find or has less users. This may result in you waiting for longer than you should. This thread is for those who can take things into their own hands and do it themselves. The tools are available everywhere but I'll give you the best order and steps. I'm using the China LG G4 H818 Dual SIM variant but this method is UNIVERSAL FOR ALL LG G4s.
The process will involve extracting a system image, injecting root and reflashing this image. Most of the steps are effortless and need just copy and paste with keen eyes. Do it slowly. You need an Ubuntu installation for step 2 of this 3-step tutorial. I used universal USB installer and put in on my 8GB USB. Anywhere will do so far as it boots&works. Beware this thread is not dumb-proof but this will not wipe your data or void your warranty if done successfully.
Step 1 -> Getting the proper system image.
Check here and skip to step 3 if you have your rootedsystem.img
>Don't worry because this doesn't require searching. It is from your device. Every device has a system partition and this method will pull it out as an image without root required.
1--Make sure all drivers are installed properly. I'll not be talking about this. We're on XDA not kindergarten.
2--Download the LG_root file or send command file from here and extract it. US Carrier specific check here
3--Put your device in download mode and connect it to your PC.
4--Open(double-click duh) port.bat and make sure to write down the number after com. There maybe different com numbers but choose the com on the DIAG1 line and write down that number. This is important.
5--Hold shift and right-click in any empty space in the extracted folder. Choose open command windows here.
6-- In that copy and paste this
Code:
[FONT=Lucida Console][COLOR=#ff8c00]Send_Command.exe \\.\COM[/COLOR][COLOR=#00ff00][*insert your number here][/COLOR][/FONT]
7--Now you're in send command mode. Nothing looks different on your phone but that's ok. It should just remain in download mode.
8-- On the computer screen in the window you now see #.
9--Now in this post copy the Backup system to internal storage command specific to your device model number. Check in you settings >general >about if in doubt. This is the most important step. Copy the whole line of code. Highlight with your mouse, select everything on the line and copy.
10--You didn't come all this way to fail so do it. Remember it is device model specific.
11-- Paste it in the command window and hit enter. It should take a while so wait until you see#reappear.
12--Now typeLEAVEall in capital letters. Your device will reboot. Check using the file manager if you have a file called system.img in your internal storage. If yes step 2 is next and you did well. If no repeat it and follow the steps properly. Make sure drivers are installed especially windows 10/8/8.1 users. Check device manager
Step 2 -> Root injection.
1--Prepare your Ubuntu USB or virtual machine or computer.
2--Download inject_root zip from here and extract.
3--Copy the system.img from your phone to the extracted inject_root folder on your PC.
4-Reboot into Ubuntu.
5--Here open a terminal.
6--Gain root access on Ubuntu by typing or copy and paste sudo -i
7--You should either be asked for your password which you have to enter or if you used a USB drive like me you'll see the name change to[email protected]
8--Navigate to the inject_root folder by using cd commands. This can also be done by typing cd then [space] then dragging and dropping the folder into the terminal and hitting enter.
9--You'll now see the name in the terminal become longer with the name of the folder in it.
10--Now type chmod +x autoroot.sh
11--Hit enter then sudo ./autoroot.sh
12--If you get any thing like command not recognized or something of the sort use sudo sh autoroot.sh
-That worked for me.
13--If you're successful the name of the file should change from system.img torootedsystem.img
-Please note don't rename the files. Leave them as they are.
14--Now go back to Windows let's finish this.
Step 3 ->Root
1--Transfer the rootedsytem.img to your phones internal storage.
2--Put your phone in download mode and connect it to your PC.
3--Get into send command mode as in step one.
-Put your device in download mode and connect it to your PC.
-Open port.bat and make sure to write down the number after com. There maybe different com numbers but choose the one that has DIAG1 on the same line as it. Note it down this is important.
-Hold shift and right click in any empty space in the extracted folder. Choose open command windows here.
- In that copy and paste this
Send_Command.exe \\.\COM[*insert your number here]
-Now you're in send command mode. Nothing looks different on your phone but it's find. It should just remain in download mode.
4-Now grab your command to flash system.img line of code from this post. It isn't the same as step one. Copy that an paste in the command window. Make sure it is for your device. They are model specific.
5--This should take a while so wait until you see the # again.
6--After thatLEAVEand upon reboot you should have root.
To Un-root just flash a KDZ file compatible with your device here.
Testimonies
Spudnubs said:
Rooted H812 10g for my fellow Canadians. Enjoy!
https://www.androidfilehost.com/?fid=24052804347821979
Click to expand...
Click to collapse
Wildsheep said:
This root method works for my G4 purchased in Singapore (H815 SEA)
Click to expand...
Click to collapse
luongquang said:
Thanks to @hackarchive, H818p10f done with tut.
Click to expand...
Click to collapse
player911 said:
Fantastic. This method will also ease devs for future rooted firmwares. I really cannot see LG being able to patch this, since this is basically a 3rd party LG Flashing tool. If they block this method, then their own tool will ultimately die with it.
Click to expand...
Click to collapse
GavTheStoner said:
Fantastic! I had almost given up hope of root on my EE LG G4. Have just used this method and now rooted perfectly!
hackarchive You rock! Have a thanks!
Click to expand...
Click to collapse
articular said:
everything worked fine and i successfully got my g4 rooted
my variant is H815TR
all steps easy only the ubuntu part was a bit hard especially for a windows user ( finding an ubuntu version and usb install etc. not root injection part)
ty ty ty again )
Click to expand...
Click to collapse
rirozizo said:
if it were for me to decide if we should delete the low effort root method, i'd totally delete it.
"The more 'manual', the better"
Click to expand...
Click to collapse
Moe5508 said:
Only method that roots my device successfully...I updated to 10e of the H815P and using this method (and only this!0 I was able to root my phone...ah felt so good...
The other 1-click rooting methods I came across in other parts of this forum just fail on the G4...
Click to expand...
Click to collapse
Marshmallow and root situation read here
Hit thanks if you appreciate. Hope I helped.
Credits to them whom without this won't be possible :good:
Thecubed
Team Codefire
ManhIT

This is a good method, thanks for writing this up.
I would like to add a few points....
I recommend you do keep your original system.img on your phones regular internal storage. If you encounter any boot issues you can then re-enter download mode and write the original system.img over the top of the failed root attempt. Use the same command from "step 3: root" but replace rootedsystem.img with system.img. This should still be on your phone from step 1 and will recover your phone from a failed root injection attempt. Note that it will not recover your phone if you messed up the dd command and overwrote other partitons. Be sure to use the right dd command and cut n paste to prevent seek/offset typeos.
I also recommend that you keep a backup of your system.img on your pc. When you run autoroot.sh in step 2 the copy on your pc will be renamed and patched. I suggest copying system.img somewhere else first, or re-copy it off your phone.
Additional credits to blog.lvu.kr. This is the blog of the hobbyist who reverse engineered the download mode protocol, created send_command.exe and gave it to the world. Kudos to you.

How is this any easier than the original method....if anything this requires even more work

kyle1867 said:
How is this any easier than the original method....if anything this requires even more work
Click to expand...
Click to collapse
It's for those who have rare variants.

psycho_asylum said:
It's for those who have rare variants.
Click to expand...
Click to collapse
Then you should probably take out the claim that this method is easier from the OP

Can this be used to inject Xposed as well for those of us with locked BLs.

djkinetic said:
Can this be used to inject Xposed as well for those of us with locked BLs.
Click to expand...
Click to collapse
No, we need to wait for a custom recovery.

psycho_asylum said:
No, we need to wait for a custom recovery.
Click to expand...
Click to collapse
Just used flash fire it worked rocking xposed now on 810!

djkinetic said:
Just used flash fire it worked rocking xposed now on 810!
Click to expand...
Click to collapse
Oh nice! I wasn't adventurous enough to try it. I'll make a system backup and give it a whirl!

Very nice thread, thank you. The steps were short, few, and fairly concise.
I was waiting for something like this where I could modify my own image and I wouldn't have to wipe everything or replace it with a new image.
One thing you might want to mention is that if your phone is encrypted, you'll need to unencrypt it first.
Can anyone link me to some instructions on how to disable OTA updates for an unlocked/international H815T?

kyle1867 said:
How is this any easier than the original method....if anything this requires even more work
Click to expand...
Click to collapse
This is what XDA is all about. It tells you how to inject root into your OWN system image. it's the opposite of spoon feeding. it's about teaching members how to do things for themselves. Too many people come here expecting to be spoon fed and have thigns done for them. This thread teaches people how to do their own work, while learning something at the same time.
Good work OP! :good:

the_scotsman said:
This is what XDA is all about. It tells you how to inject root into your OWN system image. it's the opposite of spoon feeding. it's about teaching members how to do things for themselves. Too many people come here expecting to be spoon fed and have thigns done for them. This thread teaches people how to do their own work, while learning something at the same time.
Good work OP! :good:
Click to expand...
Click to collapse
Thanks. I guess people don't know what XDA is about. Seeing noobs and others trying to spit on hard work when I used my time and device as Guinea pig. Also people don't know this is almost brick-proof because the system image if from their devices. Unless they use wrong commands but all here is just copy and paste. They see lot's of text and get cold feet. Anyways will be updating the OP with system images. If yours is available please share. If you see your image available and you have drivers and LG_root downloaded proceed to step 3.

The only downside is that I have to drag out my windows laptop instead of doing everything on the ubuntu machine I use at work.
But if that's the biggest of my problems then I don't really have a problem

hi, thx for this tutorial, looks good
when flashing back the rooted img,does it wipe everything ? apps, data ... etc
thx
EDIT: just correct me if im wrong
using this method WILL NOT wipe everything on my device cause im rooting my system with everything on it
correct ???
must make sure before i go ahead
thx

How to calculator extractly bs/seek/count ?

Is there a possibility of any personal data being written to /system on a phone during normal use? I can provide 10c Optus AU (carrier 505-02) if I can be sure its not identifying, but ive been using the phone a couple of weeks.
Download link:
https://www.androidfilehost.com/?fid=24052804347799013

optiplex2012 said:
using this method WILL NOT wipe everything on my device cause im rooting my system with everything on it
correct ???
Click to expand...
Click to collapse
correct.
---------- Post added at 06:01 PM ---------- Previous post was at 05:29 PM ----------
djkinetic said:
Can this be used to inject Xposed as well for those of us with locked BLs.
Click to expand...
Click to collapse
HTCuser90 said:
How to calculator extractly bs/seek/count ?
Click to expand...
Click to collapse
I would also like to know this. You can resolve system by running the following. Note that this is for the H815T and is not the same on all variants.
# ls -lZ /dev/block/bootdevice/by-name/system
You'll get something like:
lrwxrwxrwx root root ubject_r:block_device:s0 system -> /dev/block/mmcblk0p47
Which tells you the actual block device (partition its on).
And you can see the size of that with:
# cat /proc/partitions
where you see:
major minor #blocks name
<snip>
259 15 4239360 mmcblk0p47
<snip>
However I dont know how to identify how large a block is or how to calculate the start offset in the main partition.

ok, it worked great
wasnt easy, since im not so familiar with using ubuntu, but all is ok
the explanation of the how to... was great and nothing lost
my H815L is now rooted
thx guys

djkinetic said:
Just used flash fire it worked rocking xposed now on 810!
Click to expand...
Click to collapse
I know it's kind of going off topic, but I figured I'd mention that Flash Fire doesn't work on VS986. It just goes to a black screen and sits there forever. I left it sit for almost an hour. I saw elsewhere it has something to do with automount, I'll have to mess with it further.

hackarchive said:
Hit thanks if you appreciate. I spent hours trying to root so hope I helped.
Click to expand...
Click to collapse
Appreciated but you should include a way to unroot (undo) as well, ie how do we get back to stock (if required) ?