Develop Bugs

[Q] Nexus 7 (2013) Stuck between TWRP 2.6.0.0 and Google logo

Hello everyone,
I hope there is somebody out there who can help my Nexus7 -2013 to operate again.
My nightmare started after upgrading Android os to 5.0.2. The tablet started to shutdown from time to time, so i searched for downgrading to an older version but could not find such option on the menu.
Therefore, i followed a youtube video -not knowing what i was doing- and setup TWRP 2.6..0.0 on my tablet. When i opened it again, OS was working but google play and keyboard were not working.
So, i tried to backup, no success. Then i tried all options on TWRP menu (wipe, factory reset etc.) and it got worse.
Currently, when i open the tablet, it takes me to Google logo with a lock, no desktop or OS works. (see picture 1). If i wait long, it takes me to TWRP menu. see pic2)
For the last one week, i tried everything; adb sideload, install, mount etc, nothing solves the problem.
There is no place to run flash commands etc. I connected to computer but only adb sideload works and it does not help me use any other commands.
I had a flash disk with 5.0.2 and 5.0.1 factory images, but it did not setup those two files (and does not see them on flashdisk anymore i do not know why)
I also downloaded twrp 2.6.0.0 and 2.8.5.0 MD5 img's and tried to use but no success, changed file extensions to zip also not worked etc. (see pic3)
Anyway, finally i downloaded alternate rom (CleanROM-5.1.0) and UPDATE-SuperSU-v2.46.
I am trying to setup any of these, just to operate the device.
I install SuperSU (zip1) and CleanRom(zip2) together from install menu and setup was complete (see pic4). CleanRom was setup successfully.
However, when i reboot from TWRP after install it says "root permission appear to be lost..." (see pic4). Whatwer i do, it opens with Google logo and the only place it takes me back is TWRP recovery page.
Your support on this is greatly appreciated.
Thank you

Follow the instructions here. You can transfer installation files in recovery using adb commands or you should be able to copy using Windows Explorer.
http://wiki.cyanogenmod.org/w/Install_CM_for_flo

Or go back to stock using the Nexus images.

[solved ]Update with Flashfire and current factory image leads to bootloop into twrp

Hi,
I wanted to update my Pixel C to the most current factory image with flashfire as i did it before a few times without problems.
So I DL'd current factory image from https://developers.google.com/android/images#ryu, opened it in flashfire and said it should flash the normal partitions except recovery as i don't want that it overwrites my TWRP.
Flashfire analyzed the zip file and after i said "flash" it restarted my Pixel into a black screen. At this point i was wondering that nothing more happened.
I waited for 10 minutes so that maybe something in the background could happen, but there was no further action. The screen kept black.
After these 10 minutes i restarted the device but now it always runs into TWRP directly instead of starting the system
I also tried to install the zip manually in TWRP but it tells me
"Could not find 'META-INF/com/google/android/update-binary' in the zip file.
Error installing the zip file '/usb-otg/ryu-n2g48c-factory-0bc0ee15.zip'"
As you can see from the error message i also tried to dl the file again and install it via OTG but the same thing.
If I go into the file manager in TWRP i can still access the folders from the sdcard.
The bootloader is unlocked of course.
Anyone an idea what i can do without loosing all the data?
Thanks in advance

Download the full system image and extract it. There should be a flash_all-file (bat for windows of sh for linux). Open it with an editor and remove the "-w" option in fastboot. "-w" is the switch for wipe. After you removed it, you can flash the complete image and your system should boot again into android. After that you can install a custom recovery, etc. again.

Thank you peter, worked like a charm for the system flash. Now follows the TWRP etc again
EDIT: ok, the system flash was the only thing that worked like a charm. I tried flashing TWRP with NRT but didn't work. I am stuck now at a "no command" screen when i start the device.
To install the custom recovery NRT tells me that i will loose all my data, so i wanted to backup everything.
Unfortunately i can't backup everything now as the temp booted TWRP demands a password to decrypt the sdcard, but i only have a pattern and no password set.
So now i try to flash everything again and to install twrp without loosing all the data.

Hey everyone I have flashed android 7.1.2 August again and android started afterwards without any problems. I was able to restore the backup of all the apps from Google.
Than I wanted to get back root and flashed TWRP with Nexus Root Toolset, but now only TWRP starts every time I switch on the tablet. Any ideas what I can do?
EDIT: I fixed it somehow with flashing the whole firmware package again and than the TWRP wich broke the startup again so i ended up in a TWRP bootloop. Therefore i flashed android again and TWRP 3.0.0.0 than TWRP 3.0.2.4 (something like that) and after like 3 to 4 different flashing steps it worked again. I have no idea what happened during the first flash of Andoir 7.1.2 but i think that something broke there.

Updated to 8.1 without disabling Substratum overlays... device now unusable

So, I tried flashing the 8.1 Final using Chainfire like a tutorial suggested. That was my second mistake.
My first mistake was not disabling my Substratum overlays before doing the above, even though I knew better. So anyway...
I knew something wasn't right the way my device rebooted in the middle of Chainfire doing its thing, and was on the G/progress bar for a long time. I decided to dirty flash the complete factory image, and I removed the '-w' from the flash-all script so it wouldn't wipe my data.
Now the device boots, and of course I have the System UI issue because I didn't clear the overlays. But wait... it gets better!
I found this thread which has ADB commands that supposedly fix this. So I fastboot booted into TWRP to run the commands. It asks for my password- and when I enter it, it says it's invalid!! I tried numerous times, rebooted etc, and it still does not accept my passcode.
It appears I should be able to use ADB in TWRP without my passcode, so I give it a try. I am able to sideload no problem, however when I type 'adb shell' it tells me 'error:closed'. I've searched that error, which everyone says was fixed for them with either a reboot or updating their adb/fastboot. I did both of those things, and the error still persists.
I have also tried sideloading the substratumrescue.zip file I found in another thread, however it doesn't seem to be made for this systemless setup or something.
I have had to set this device up twice since I got it, and I am really not looking forward to doing it a third time, so if anyone has any suggestions that will keep my data, I would be happy to hear them out!!
What could be causing TWRP not to accept my passcode?
Why do I get the 'error:closed' when I try to adb shell?
Any help is greatly appreciated!

Ran into almost the same thing last night (not using flashfire, but with the factory flash-all.bat). Forgot to clear my theme and got the system UI error with everything borked. Even had the invalid password in twrp.
I hate to say it, but I had to just flash the factory image with a wipe and start everything over. Lost all my pics and music from the few days I had the phone. I have now learned how not to update in the future.

IrocD said:
So, I tried flashing the 8.1 Final using Chainfire like a tutorial suggested. That was my second mistake.
My first mistake was not disabling my Substratum overlays before doing the above, even though I knew better. So anyway...
I knew something wasn't right the way my device rebooted in the middle of Chainfire doing its thing, and was on the G/progress bar for a long time. I decided to dirty flash the complete factory image, and I removed the '-w' from the flash-all script so it wouldn't wipe my data.
Now the device boots, and of course I have the System UI issue because I didn't clear the overlays. But wait... it gets better!
I found this thread which has ADB commands that supposedly fix this. So I fastboot booted into TWRP to run the commands. It asks for my password- and when I enter it, it says it's invalid!! I tried numerous times, rebooted etc, and it still does not accept my passcode.
It appears I should be able to use ADB in TWRP without my passcode, so I give it a try. I am able to sideload no problem, however when I type 'adb shell' it tells me 'error:closed'. I've searched that error, which everyone says was fixed for them with either a reboot or updating their adb/fastboot. I did both of those things, and the error still persists.
I have also tried sideloading the substratumrescue.zip file I found in another thread, however it doesn't seem to be made for this systemless setup or something.
I have had to set this device up twice since I got it, and I am really not looking forward to doing it a third time, so if anyone has any suggestions that will keep my data, I would be happy to hear them out!!
What could be causing TWRP not to accept my passcode?
Why do I get the 'error:closed' when I try to adb shell?
Any help is greatly appreciated!
Click to expand...
Click to collapse
What a mess hahah! It sounds like your password file got corrupt; doing all that dirty flashing is messy. If I were you I would connect the phone to a computer and get off what data you can (most stuff is cloud now days anyway). And flash a 8.1 stock factory image using fastboot on the bootloader. You can never go wrong with flash a stock factory image. Yes you loose your data, but you get a working phone haha. If your really worried about data see if you can get MTP to work and transfer it off.

Dumbass me
Yep, that was me yesterday. Genius me sideloaded the 8.1 OTA without disabling my Substratum overlays and so I was met with the "System UI Tuner has stopped" message. Then an automatic reboot to the bootloader asking me to either "Try again" or "Factory reset phone". Guess what I had to do to get my phone working again? Had to factory reset that sh*t.
Oh well, at least I made sure to unlock my bootloader this time around before setting up my phone.
But to be fair, would've been f*cked either way even if I had waited for the OTA because it's essentially the same thing as the zip file anyways. Lesson learned: disable Substratum when you update your sh*t.

Fastboot boot TWRP beta 2, and go to advanced and sideload the substratum recovery zip and it'll fix it

Strange. I didn't disable my Themes and I had no issues at all sideloading.

fantasy2c said:
Fastboot boot TWRP beta 2, and go to advanced and sideload the substratum recovery zip and it'll fix it
Click to expand...
Click to collapse
This is exactly what I did. When it asks for your password, click cancel and it'll let you get into twrp. Go to adb sideload and sideload the rescue zip. I've attached it below. When you boot, uninstall the old overlays, then build and enable them.

I only update once a month when a new patch comes out.
I set my apps to not auto update
After a new patch comes out in the first week of the month I
-disable the overlays and remove them
-update swift black and compile new overlays
-update all my apps
-adb to recovery and flash ota
-apply new overlays
- reboot and good to go

I have done it before to you can just boot TWRP as long as you have that rescues zip on your flash drive you can do it that way too

rajlulla said:
This is exactly what I did. When it asks for your password, click cancel and it'll let you get into twrp. Go to adb sideload and sideload the rescue zip. I've attached it below. When you boot, uninstall the old overlays, then build and enable them.
Click to expand...
Click to collapse
Thought I was screwed, Thank you so much for this post.

Try formatting your internal memory using TWRP. It should be "formatting", no other type of wipe will be sufficient. Then flash your favourite ROM and enjoy!

My Honor 7x BND-L21 is quite broken, need help

Hello, sorry for the generic title, but i'm quite the noob about android modding and stuff.
Anyway I wanted to root my phone, just to stream some music to my stereo system. How naive I was...
So I unlocked the bootloader, installed twrp with adb and SuperSU with twrp. Everything was fine and phone was rooted but my past naive me thought "well let's try a custom rom, why not". So I went forth and downloaded some stuff from getdroidtips and what I understood is that all I needed to do was to do a wipe, then install the zip file via twrp. I did that and didn't work. After that I realized I made a crucial mistake: I didn't backup my phone from twrp, so I was there with no OS, quite panicked and frustrated. So I tried some other roms, finally I got one that worked, this: https://forum.xda-developers.com/honor-7x/development/openkirin-aosp-8-0-honor-7x-t3746257
It works but it's barebones and on boot it shows a message: "There's an internal problem with your device. Contact your manifacturer for details.". So, I tried recovering from HiSuite, recovery mode etc but nothing worked, I reinstalled SuperSU in the new OS via twrp to see if that would help somehow, but no. in the end I had the even more naive thought that maybe unrooting would allow me to repair via hi suite or something, so I mindlessly selected "complete unroot" on the SuperSU app, and this was the second big mistake, the process somehow ****ed up the twrp install and it no longer works. Instead, if I try to enter twrp with power button + volume up button, it shows the regular "your phone has been unlocked" screen and then comes up for a split second a black screen with, on the bottom half of the screen the "no command" logo, under it some lines of code that I can't read. It suddenly disappears and sometimes enters in a bootloop showing this screen and powering off every time.
If I keep power button pressed bootloop ends and the phone boots "regularly" in the openkirin OS.
I tried reinstalling twrp the same way I did the first time. No error on adb but same no command behaviour
So what I got now is:
kind of bootlooping no command window
openkirin OS with internal problem message
fastboot and rescue mode
it seems to work on adb (everything is fine if I type adb devices)
not working HiSuite recovery
not working Huawei eRecovery
not working download mode (I guess? the power+volume up+volume down combination)
Maybe I should mention I also did a data wipe (?? the option on the right next to "advanced wipe" in the Wipe screen, if I remember correctly) in twrp before installing openkirin, it was suggested on a yt video about how to install openkirin. And that, at a stage I tried using MultiTool but it gives me an error: "exception during a web client request. Error#9", while at the bottom left it says "downloading AdbWinUsbApi.dll..."
Sorry for the general noobishness and the bad english that might be there.
So, any tips for bringing back the phone to normal? Or at least repair twrp??
Please help, I hate needing to throw this phone away just because I wanted to stream some music and because of a couple of stupid errors

Sorry for not answering earlier. It seems, between TWRP and stock recovery, you have messed up I think. When there is no proper recovery it become difficult to bring back the phone. You should try to put it in fastboot mode first, by powering off, pressing the volume lower button and connecting it to computer. Try installing TWRP and flash a custom rom other than openkirin from there if possible. Fastboot is the choice to go if recovery is messed up.

sdivk said:
Sorry for not answering earlier. It seems, between TWRP and stock recovery, you have messed up I think. When there is no proper recovery it become difficult to bring back the phone. You should try to put it in fastboot mode first, by powering off, pressing the volume lower button and connecting it to computer. Try installing TWRP and flash a custom rom other than openkirin from there if possible. Fastboot is the choice to go if recovery is messed up.
Click to expand...
Click to collapse
No worries, I managed to fix it anyway. Some things might be obvious but I'll share what I did nevertheless, in case some other newbie finds himself in a similar situation.
So there was seemingly no way of reinstalling twrp nor the stock recovery. But luck came my way and by almost random clicking I found out that, even if multitool closed as soon as I clicked the ok button in the error message, if I simply ignored the error, the program worked just fine (as I write this I installed another version and it gave no error message). So I played with it a bit and found out that it can flash twrp and it does not need a file from you, it already has a twrp version ready to install. I did that and it worked. It looks like the first twrp file I used didn't work anymore or was someway corrupted by the countless things I tried. So, with twrp working again I was able to backup the sloppy openkiring OS and try the unbrick tool. So I browsed the internet for a guide. Guides always mention as the first step for unbricking using the VENDOR.img file located inside a full stock rom. Problem is, 99% of the times they provide a rom without the needed file. So after some tries I found a good complete stock rom with the VENDOR.img here: drive.google.com/file/d/1tjHefytEWbpuV1f4YjX8AaSMzT6jr8TQ/view but I can't remember which forum/site I found it in.
I followed the guide which involves:
-extracting the UPDATE.APP file contained in the provided zip with huawei extractor tool into an X folder on your pc
-copying the VENDOR.img file contained in the X folder, on the root folder of the sd card
-backing up OS (if there's any) via twrp (I had something like 50 partitions, I guess that was messing things up a bit, but for safety I backed them all up)
-doing an advanced wipe from twrp selecting ALL checkboxes BESIDES the SDcard of course
-flashing the vendor.img file via twrp selecting the "Vendor" partition when prompted
-downloading the update_full_[your model]_hw_[your region].zip file, in my case update_full_BND-L21C_hw_eu.zip
-extracting the UPDATE.APP file contained in update_full_BND-L21C_hw_eu.zip with Huawei extractor tool in some other folder Y
-looking for a file named cust.img/CUST.img/version.img/other_name.img (I don't know which other names it can have, I was lucky and had a VERSION.img file in it)
-rename the cust.img/CUST.img/version.img/other_name.img to CUST.img and copy it from the Y folder to the X folder
-boot your phone into fastboot mode
-connect phone to multitool via usb and select the "unbrick" tab
-there, Multitool asks for a folder, give it the X folder. There are some checkmarks on the Multitool "unbrick" page. 4/5 of them should become checked after the folder input. In my case the first 4
-then, simply press the unbrick button
-wait and pray (it can look like it freezes while it's copying the system.img file but wait, it'll be fine)
So I did that and it worked flawlessly, the phone booted slowly but surely into EMUI 5.1 with Android 7.0 I think and everything was fine.
At that point I had a working OS and a working twrp but wanted to go back to the OS I was used to, Android 8.something so, I tried connecting the thing to HiSuite and it automatically asked if I wanted to update, not to 8.something but to 9.1. I thought "SURE I DO!" and updated flawlessly (I thought 9.1 hadn't even been released here in Italy).
When it booted I found out the new OS was working like an antivirusless xp pc: it didn't recognise the SIM, it would crash every 20 seconds, app downloads got stuck at 99%, if it felt like it, it rebooted, pc connection was not stable. Besides, the update being "official" and installed from "trusted" sources (HiSuite), it completely wiped twrp.
And that was the "OH ****, here we go again" moment: no twrp and worse-than-ever-working OS.
So because of the new EMUI version, I guess, Multitool kept recognizing the phone but stopped offering its own recovery, eRecovery, twrp files available for flashing. I was completely frustrated with all of this and decided to give up, but I made the last effort: I tried the relock function in multitool. So I provided the key, pressed relock, waited, prayed, and finally cheered. It worked like a charm. Phone runs now on EMUI 9.1 with locked bootloader without problems. Finally
So I guess in the end I payed 4 euros for a nice update, a painful and frustrating trip into android modding and a lesson : never do android modding!
no, just kidding, don't do it just if you are a newbie AND you don't want to risk to throw the phone in the grabage.
In all other cases consider it carefully
Oh, and also, God bless the MT Team and Russia altogether!! thanks

Quite an experience. All the best. ?

Lol sounds fun. I've bricked my Huawei Mate SE/Honor 7x more times than I can count. I'm just awaiting my 9.1. I want my GPU Turbo! Is it as good as it's supposed to be?

Lenovo P2 (P2a42) stuck mostly on blue logo screen

Hello --
I found this very nice looking phone thrown away in a bin and I guess this problem was the reason.
It would be great to get it going maybe even worth paying to get it running.
But I would appreciate any suggestions on how to do it myself.
I am not familiar with a lot of the in-depth hacks people do with phones. Words like "flash" and "ROM" are foreign to me.
But I like to try to fix things.
I have tried a few simple actions to get the phone going but it still does only three main things:
1. Shows the "Lenovo powered by Android" screen of course.
2. Volume down + Power: shows Fastboot screen with just three options: Start, Barcodes, Power off
3. Occasionally, some buttons I push get to Teamwin Recovery Project. But I do not exactly know how it happens and it is hard to repeat. It seems to come up after trying everything and then putting the phone down.
From TWRP I have selected these options:
-- Factory reset
-- Restore (I think) -- I selected just a single item displayed available for restore
-- Wiped Delvik cache and format cache
-- Reboot
I also downloaded ADB and installed it. Instructions I read said to run an .exe file but all I could find was .bat so I clicked on it and saw the RUN screen open briefly then close.
Thank you.

NickSergeant said:
Hello --
I found this very nice looking phone thrown away in a bin and I guess this problem was the reason.
It would be great to get it going maybe even worth paying to get it running.
But I would appreciate any suggestions on how to do it myself.
I am not familiar with a lot of the in-depth hacks people do with phones. Words like "flash" and "ROM" are foreign to me.
But I like to try to fix things.
I have tried a few simple actions to get the phone going but it still does only three main things:
1. Shows the "Lenovo powered by Android" screen of course.
2. Volume down + Power: shows Fastboot screen with just three options: Start, Barcodes, Power off
3. Occasionally, some buttons I push get to Teamwin Recovery Project. But I do not exactly know how it happens and it is hard to repeat. It seems to come up after trying everything and then putting the phone down.
From TWRP I have selected these options:
-- Factory reset
-- Restore (I think) -- I selected just a single item displayed available for restore
-- Wiped Delvik cache and format cache
-- Reboot
I also downloaded ADB and installed it. Instructions I read said to run an .exe file but all I could find was .bat so I clicked on it and saw the RUN screen open briefly then close.
Thank you.
Click to expand...
Click to collapse
YOU CAN CHECK IN MY SIGNATURE FOR ALL BASIC TERMS USED IN FLASHING.
Look here if you want to return to offical stock Rom
https://forum.xda-developers.com/lenovo-p2/development/fastboot-files-stock-firmware-t3649914/amp/
If you have TWRP installed , you can update TWRP and then flash a custom rom. You can hold both volume up and down and power key to boot into TWRP when phone is switched off.
Remember new custom roms need newer version of TWRP.
What you'll need to do is download a custom rom like say Havoc OS Android 10 (just search it in the forum), you will need to upgrade your TWRP.
Once this is done, you will download Havoc OS Rom and put it in your phone or sd card
You just do a factory reset and then format only system . Don't format other partitions in TWRP.
Install that room and then you will also need to install gapps. (Google open gapps , chose Android 10 version and architect as 64bit and choose nano or pico gapps)
So in your sd card, you must have rom and gapps.
Once you install rom first and then gapps, restart. If it comes with an error, it means your TWRP needs update.
To update you will choose to download TWRP (zip format will install directly while IMG format can be flashed as well by choosing install IMG while you select install in your TWRP.
Restore is only available if you already made a backup with your TWRP .
I will suggest to make a full backup (except system and data ) in TWRP before you do the above.
I will also suggest you to Google if you are not sure. Make sure to follow instructions only from XDA as they are most reliable than other sources.
Watching YouTube videos may help you as well
In short:
Update TWRP
Download Havoc Rom and Gapps pico
Put them in your sd card
Install them in this order rom and then gapps.
Restart.
If you still feel you need help, please quote me for an answer
All the best .

Hnk1 said:
Look here if you want to return to offical stock Rom
https://forum.xda-developers.com/lenovo-p2/development/fastboot-files-stock-firmware-t3649914/amp/
Click to expand...
Click to collapse
Thank you for this advice -- it worked! Finally the phone gets past the logon and is operating.
Now I have a further problem and please let me know if you think this should be a new thread for this.
I cannot sign in to Google because of anti-theft feature -- instead I get this.
“This device was reset. To continue, sign in with a Google Account that was previously synced on this device”
I see a few solutions online but not exactly for Lenovo. What would you recommend?

I'm on the same boat as Nick. Do we have to wait 15 days to unlock the bootloader? Just coz it'll be hard to be 15 days without a phone and everything wiped out. I wanna try Syberia 2.9 as the last LineageOS is not ready yet. Thank you very much.