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Help for a newbie.
I followed this procedure:
1 - Copied file to sd card and renamed to update.zip (in a windows computer)
2 - turned xoom on and wento to rom manager
3 - wiped user and dalvik cache
4 - Tried to load file from zip, but it was not possible to find the update .zip file.
I get the following message:
E: Can't open /sdcard/update.zip
(bad)
Tried also without renaming and got:
E: Can't open /sdcard/update_US-Xoom-Wifi-3.2_HTJ85B-from HMJ37_stachre-solarnz-boot-img_v05.zip
After many trials rebooted.
System info showed the same 3.1 and Tiamamat 1.4.4
Opened rom manager again.
seleced install rom from sdcard
System backed up info and rebooted.
Had to reload all apps from store.
System info shows I am running 3.1 and Tiamat 1.4.4.
Also I keep receiving a message that there is a system update available.
I can't understand what I did wrong.
I g
Can anyone help?
Thank you
rogerodd said:
Help for a newbie.
I followed this procedure:
1 - Copied file to sd card and renamed to update.zip (in a windows computer)
2 - turned xoom on and wento to rom manager
3 - wiped user and dalvik cache
4 - Tried to load file from zip, but it was not possible to find the update .zip file.
I get the following message:
E: Can't open /sdcard/update.zip
(bad)
Tried also without renaming and got:
E: Can't open /sdcard/update_US-Xoom-Wifi-3.2_HTJ85B-from HMJ37_stachre-solarnz-boot-img_v05.zip
After many trials rebooted.
System info showed the same 3.1 and Tiamamat 1.4.4
Opened rom manager again.
seleced install rom from sdcard
System backed up info and rebooted.
Had to reload all apps from store.
System info shows I am running 3.1 and Tiamat 1.4.4.
Also I keep receiving a message that there is a system update available.
I can't understand what I did wrong.
I g
Can anyone help?
Thank you
Click to expand...
Click to collapse
You may have the wrong version of CWM recovery installed. You need Tiamat v3.2.0.0 R4c. If you are trying to flash thru Rom manager it may have had you update to v4.0.0.4 which is not compatible with the external sdcard. If this is the case, re-install the correct recovery version, and then redo your backup so that it is on the external sdcard where it can be safe if you need to wipe/factory reset. You can use Rom manger just to reboot into recovery, or df Quick Boot from the market and use that instead.
Good luck!
okantomi said:
You may have the wrong version of CWM recovery installed. You need Tiamat v3.2.0.0 R4c. If you are trying to flash thru Rom manager it may have had you update to v4.0.0.4 which is not compatible with the external sdcard. If this is the case, re-install the correct recovery version, and then redo your backup so that it is on the external sdcard where it can be safe if you need to wipe/factory reset. You can use Rom manger just to reboot into recovery, or df Quick Boot from the market and use that instead.
Good luck!
Click to expand...
Click to collapse
Rom manager says it is 4.0.0.4 but when in recovery is say CWM recovery-Tiamat-R4c-100611-1150-cwm or Tiamat v3.2.0.0 R4c ( I don't remember exectly) and the error is the same.
Also, I tried reflash recovery-Tiamat-R4c-100611-1150-cwm.zip from the SD card and get an error.
I really don't have a clue of what to do.
Any help would be welcome.
rogerodd said:
Rom manager says it is 4.0.0.4 but when in recovery is say CWM recovery-Tiamat-R4c-100611-1150-cwm or Tiamat v3.2.0.0 R4c ( I don't remember exectly) and the error is the same.
Also, I tried reflash recovery-Tiamat-R4c-100611-1150-cwm.zip from the SD card and get an error.
I really don't have a clue of what to do.
Any help would be welcome.
Click to expand...
Click to collapse
The problem is that you can't flash anything from the external sdcard with v4.0.0.4. In rom manager, see if you can find"all clockwork recoveries" and find 3.2.0.0. If not, find 3.0.2.8 or 3.0.2.5 and flash one of them, preferably the latest of those I have listed. I think those will at least recognize your sdcard. If you can't do that, you will need to reflash the correct recovery the same way you did when you rooted. Remember, never flash a zip file through adb.
Good luck!
I tried to flash recovery-Tiamat-R4c-100611-1150-cwm.img via adb.
I could flash boot sector. Then I reboot into recovery and try to apply zip from card with file update_US-Xoom-WiFi-3.2-HTJ85B-from-HMJ37_stachre_solarnz-boot-img_v05.zip, but there is a NO at the end of the name of the file and I can't go on.
Trying to rename as update.zip and run apply zip from card results in same error:
E: Can't open /sdcard/update.zip
(bad)
what should I do?
Thank you
possible bad download... download again... also, don't think this would be an update... leave it as originally named, just choose the option to choose which zip file to install from the sd card
rogerodd said:
I tried to flash recovery-Tiamat-R4c-100611-1150-cwm.img via adb.
I could flash boot sector. Then I reboot into recovery and try to apply zip from card with file update_US-Xoom-WiFi-3.2-HTJ85B-from-HMJ37_stachre_solarnz-boot-img_v05.zip, but there is a NO at the end of the name of the file and I can't go on.
Trying to rename as update.zip and run apply zip from card results in same error:
E: Can't open /sdcard/update.zip
(bad)
what should I do?
Thank you
Click to expand...
Click to collapse
It sounds like you are flashing recovery ok, but you keep overwriting it with the stock recovery.
Here is some important information that should help a lot with making your new recovery "stick"and this was taken from the Idiot's guide to flashing...in the Development section, and originally written by publicanimal:
4. Install recovery image (CWM)
Download the recovery image file and save it to your computer
Boot into flash mode with 'adb reboot bootloader'
Install your downloaded recovery image
C:\Documents and Settings\Anders> fastboot flash recovery recovery-Tiamat-R4c-100611-1150-cwm.img
Restart the device with 'fastboot reboot'. Timing is essential here, so be alert when the device restarts, or you will have to redo this section
Enter CWM with the following procedure
Once the Motorola logotype is shown, start counting to 3. At 3, press the Volume Down button. This should result in the text 'Android Recovery' in the top left corner. If it does not work, experiment with the timing ...
When 'Android Recovery' is shown press the Volume Up button. This should invoke the CWM recovery menu. If that works, then congratulations for reaching this far .
Here is a potential pitfall. If you are unable to enter CWM *before* the device boots into Honeycomb, then the newly installed recovery image will be overwritten by the system default recovery. If that happens, or if you see "starting fastboot protocol " your timing wasn't right and you need to reflash the recovery image and try it again.
See original post,below for more information.
http://forum.xda-developers.com/showthread.php?t=1130996
downloaded factory image from googles website
copied latest platform tools to the same directory as the extracted contents of the zip from google.
run the batch file, can boot into android just fine.
reboot to bootloader, use fastboot boot twrp-3.2.3-0-walleye.img
install the twrp zip
android boots fine and i can use my phone normally.
install magisk apk, reboot to recovery, install magisk 16.7 zip, android wont boot
everything was fine until i made a backup last night within twrp. ive repeated the above process idk how many times. any help would be appreciated
EDIT: https://forum.xda-developers.com/pixel-2/how-to/guide-unlock-flash-root-pixel-2-walleye-t3702417 is the guide i was using.
EDIT 2: now when i install TWRP and try to reboot to system, it just reboots back to TWRP...
EDIT 3: looking at the contents of my twrp zip, theres a file called magiskboot so what im going to do is reinstall the factory image using the bash script included in the download directly from google, then just flash twrp-pixel2-installer-walleye-3.2.3-0.zip, then install the magisk manager and see what happens. if that doesnt work ill redo the factory image, boot from twrp-3.2.3-0-walleye.img, install magisk, and see what happens without installing twrp.
I sucessfully unlocked bootloader, rooted and installed twrp. I was using my phone today and i try to boot to twrp to flash RenovateIce rom and my twrp shows some strange symbols all folders... also on my computer is the same... When i tried to boot to system it just boot up to twrp again.. I cant boot it to my system.. Help please ...
here is screenshot from my pc:
First, you must ask on the Q&A section.
Second your files appears like that because they are crypted ( the password on your phone is used to decrypt it), and as i know (i may be wrong but yes you lost your data) but you need to delete your internal storage now for it to be able to use it like it should, so in twrp delete your internal storage, install your rom via adb sideload, boot and set up your phone and reflash twrp ( via the cmd and then via the zip)
Did you install renovate? You could try to use an otg drive to remove renovate if that is messing your system. They probably have a rescue zip on their forum. You could also try to flash bluspark twrp if that could help you get into your data. Hope you get your data back, otherwise the full format should revive your phone. Read up before (if)you try my suggestions.
hi ,i have fff*cked my op6 many times and i faced this , now go to bootloader and flash twrp from pc cmd or terminal again , boot twrp now u can enter password , good for now u can install sys again or copy your files to another sd card or pc or u can delete data and install system again or just install u can try and learn from your mistake
sorry bad english
vargapirot said:
I sucessfully unlocked bootloader, rooted and installed twrp. I was using my phone today and i try to boot to twrp to flash RenovateIce rom and my twrp shows some strange symbols all folders... also on my computer is the same... When i tried to boot to system it just boot up to twrp again.. I cant boot it to my system.. Help please ...
here is screenshot from my pc:
Click to expand...
Click to collapse
Dude u did loose ur data but lets see if u can get it.
Boot to fastboot
Connect usb
Open powershell in ur adb. Exe/fastboot. Exe windoe,(where u installed adb)
(U can also open powershell & use command cd e:\adb{example} to navigate.
Now u need to download & paste twrp. Img in this forder.
Then, Enter command - fastboot boot twrp.img in powershell.
Ur device will now boot into twrp & u have usb file transfer mode active now .
(Now see if u can extract any data)
If no then
Copy ur os. Zip to phone storage
Now flash os.zip using TWRP.
I sucessfully unbricked without loosing any data...
1. Rebooted to bootloader from twrp
2. Fastboot twrp.img
3. It asked me for password to decrypt
4. Flashed twrp.zip
5. Flashed magisk
6. Reboot to system
Everythings works okay now. I just repeated installing recovery and rooting proccess..
Thank you guys !
came out today. bricked my lg v20 h918
come up showing red text with number of times bootloader is unlocked and will not boot further..
tried direct install.
had to hold button down like going into recovery then select yes twice then getg into twrp then restore boot and lafs etc.
then when all working i tried to install the same version via twrp install same issue. apparently installing to wrong partition..
reinstalling the older 20.1 (hopefully you have it downloaded) from twrp worked fine.
Thanks for the info! Little late for me. Just wanted to post the last known good Magisk for anyone that needs it.
Search for download-magisk-20-1-stable
What did you do after booting into TWRP?
same issue, unfortunately, saw this post too late
same and now im screwed how can we recover this?
it says warranty void !!
number of times bootloader unlocked : 2 (in red
*Welcome to Fastboot mode:
* HOW TO EXIT fastboot mode
use 'fastboot reboot' command if the fastboot is available
i tried to install magisk 18 and then 20.1. they install but im still bricked at this same issue above.
HELP
h918
I was able to get up and running again by flashing H91820h.zip in TWRP, then flash Magisk-v20.1.zip and finally TWRP 3.3.1-0 2019-05-17 .img
Phone booted normally after this process. Hope this helps!
Similar situation. Fortunately, I did a nandroid backup first, so I restored it to get the phone up and running again.
My Success Story
For those of you who, like me, didn't have a known good backup to work with, here's what I did:
Determine ROM version installed if you don't know what it is (I was able to check the /system/build.prop file from TWRP under ro.lge.swversion)
Grab the appropriate ROM .zip file (I got my h910-10r zip file from the H910 Root Post)
Unzip the ROM file
Grab the "boot" file from the ROM and place on an SD card as boot.img
Flash boot.img to the boot partition using the TWRP install function (you'll have to toggle it to show Images in the install screen)
Reflash Magisk v20.1 (you can download it from github)
Wipe Dalvik and Cache
Reboot
Wait for the LONG boot process which will go through the nerve-wracking android is staring screen with the percentage bar as it rebuilds the Dalvik cache (I think that's what it's doing)
As a note, this did not clear any of my data.
Good luck, YMMV.
For anyone with this issue run the latest magisk uninstaller in twrp and restart the phone. If that doesn't work boot back into twrp and install magisk 20.1
---------- Post added at 08:47 PM ---------- Previous post was at 08:45 PM ----------
James.ptrsn said:
For those of you who, like me, didn't have a known good backup to work with, here's what I did:
Determine ROM version installed if you don't know what it is (I was able to check the /system/build.prop file from TWRP under ro.lge.swversion)
Grab the appropriate ROM .zip file (I got my h910-10r zip file from the H910 Root Post)
Unzip the ROM file
Grab the "boot" file from the ROM and place on an SD card as boot.img
Flash boot.img to the boot partition using the TWRP install function (you'll have to toggle it to show Images in the install screen)
Reflash Magisk v20.1 (you can download it from github)
Wipe Dalvik and Cache
Reboot
Wait for the LONG boot process which will go through the nerve-wracking android is staring screen with the percentage bar as it rebuilds the Dalvik cache (I think that's what it's doing)
As a note, this did not clear any of my data.
Good luck, YMMV.
Click to expand...
Click to collapse
Thanks so much, you really saved me. I was panicking for sure. These directions need to be stickied!
---------- Post added at 08:49 PM ---------- Previous post was at 08:47 PM ----------
BadToThePhone said:
For anyone with this issue run the latest magisk uninstaller in twrp and restart the phone. If that doesn't work boot back into twrp and install magisk 20.1
Click to expand...
Click to collapse
Tried didn't work, but thanks, the one above worked for sure, no lost data
lgkahn said:
came out today. bricked my lg v20 h918
come up showing red text with number of times bootloader is unlocked and will not boot further..
tried direct install.
had to hold button down like going into recovery then select yes twice then getg into twrp then restore boot and lafs etc.
then when all working i tried to install the same version via twrp install same issue. apparently installing to wrong partition..
reinstalling the older 20.1 (hopefully you have it downloaded) from twrp worked fine.
Click to expand...
Click to collapse
Unfortunately i wasn't lucky with this.. got stuck in fastboot, my sd and internal storage are both wiped, Rip years of data on that sd.. Can't get a system on the SD or internal storage, Fastboot isn't helping, ADB sideload won't load in twrp, LG Bridge won't detect my phone Am i screwed with this? I can boot to twrp but thats about it
texas7412 said:
Unfortunately i wasn't lucky with this.. got stuck in fastboot, my sd and internal storage are both wiped, Rip years of data on that sd.. Can't get a system on the SD or internal storage, Fastboot isn't helping, ADB sideload won't load in twrp, LG Bridge won't detect my phone Am i screwed with this? I can boot to twrp but thats about it
Click to expand...
Click to collapse
TWRP on my US996 automatically made the phone a usb drive when it got plugged in. Have you looked for it as a usb drive? also have you checked your usb drivers?
James.ptrsn said:
For those of you who, like me, didn't have a known good backup to work with, here's what I did:.......................
Click to expand...
Click to collapse
Fortunately there is even more easy way to recover.
My H990DS has been also affected by Magisk update. Luckily I discovered that Magisk itself makes a backup of the boot image during update from previous Magisk version. It is located in the /data/magisk_backup_<very long sequence of characters and digits>. The name of the backup archive file is boot.img.gz
So I booted to TWRP, unziped the file boot.img from the above archive and flashed it to the boot partition using TWRP. Then rebooted to system.
And that's all folks! No data loss, no need to look for original ROM.zip, no need to look for and re-flash Magisk 20.1 (the system has been restored automatically to Magisk 20.1), no need to wipe Dalvik and Cache!
I think that this solution is the most simple and easy, so need to be in sticky post.
I'm in the TWRP Recovery file manager and I can't see magisk backup folder.
pendgy said:
Fortunately there is even more easy way to recover.
My H990DS has been also affected by Magisk update. Luckily I discovered that Magisk itself makes a backup of the boot image during update from previous Magisk version. It is located in the /data/magisk_backup_<very long sequence of characters and digits>. The name of the backup archive file is boot.img.gz
So I booted to TWRP, unziped the file boot.img from he above archive and flashed it to the boot partition using TWRP. Then rebooted to system.
And that's all folks! No data loss, no need to look for original ROM.zip, no need to look for and re-flash Magisk 20.1 (the system has been restored automatically to Magisk 20.1), no need to wipe Dalvik and Cache!
I think that this solution is the most simple and easy, so need to be in sticky post.
Click to expand...
Click to collapse
Thank you. This helped a lot. Can't remember ever being without my phone for this long. Very stressful. This worked for my LG V20. Few things to add. I was super nervous to boot into twrp using the hardware "factory reset" option. Normally it just asks to wipe data once before booting into TWRP but after this happened, it asked two times. Was worried the magisk "update" wiped out my twrp and I was going to actually wipe all of my data using the recovery option. After unsuccessfully trying multiple ways to install twrp via fastboot as a safety net, I bit the bullet and did the double factory reset. Thankfully, it brought me to TWRP. Those of you worried, hope this helps ease your mind that twrp is intact after this debacle.
Next, using @pendgy help, I found the boot.img.gz but was unable to unzip in twrp. I copied the file to the internal sd so I could view on my pc. Connected to pc while in twrp and unzipped the boot.img.gz folder. Then extracted the boot.img into the internal sd. Was then able to install image to boot partition. Rebooted and everything was exactly as it was 17 hours ago when my heart sank. Yay!
Thanks to everyone for the reports and warnings. I saw the update to Magisk Manager yesterday on my Shield K1 and allowed that to update. I didn't update Magisk itself because I don't trust the direct install method through Manager. I saw the notification on my sandbox V20 this morning and dismissed it. My daily V20 hasn't received an update notification yet, but I think I disabled status bar notifications for Magisk on my daily. I'll be sure to not install 20.2 on either phone.
Magisk Manager's update notifications are pretty annoying to be honest. My devices are already rooted. An updated version of Magisk isn't going to make them rooted better.
Oh boy. Learning a lot of hard lessons this morning.
Apparently my TWRP install has been broken/corrupted for who knows how long. I'm now several hours into restoring my phone from basically scratch (had to retry a bunch of times because I'm a dumbdumb and haven't poked around at Android recoveries in ages).
Moral of the story: BACK UP EARLY and BACK UP OFTEN. If you don't have a backup (any kind of backup), the day will inevitably come when you wish you did. Sigh.
Oh well, maybe my phone will run a bit smoother now. Good luck everyone.
pendgy said:
Fortunately there is even more easy way to recover.
My H990DS has been also affected by Magisk update. Luckily I discovered that Magisk itself makes a backup of the boot image during update from previous Magisk version. It is located in the /data/magisk_backup_<very long sequence of characters and digits>. The name of the backup archive file is boot.img.gz
So I booted to TWRP, unziped the file boot.img from the above archive and flashed it to the boot partition using TWRP. Then rebooted to system.
And that's all folks! No data loss, no need to look for original ROM.zip, no need to look for and re-flash Magisk 20.1 (the system has been restored automatically to Magisk 20.1), no need to wipe Dalvik and Cache!
I think that this solution is the most simple and easy, so need to be in sticky post.
Click to expand...
Click to collapse
How did you unzip the archive with TWRP?
Edit: Nevermind, copied the archive to external SD und unzipped it with 7z on my computer.
fatappel said:
...............................
Next, using @pendgy help, I found the boot.img.gz but was unable to unzip in twrp. I copied the file to the internal sd so I could view on my pc. Connected to pc while in twrp and unzipped the boot.img.gz folder. Then extracted the boot.img into the internal sd. Was then able to install image to boot partition. Rebooted and everything was exactly as it was 17 hours ago when my heart sank. Yay!
Click to expand...
Click to collapse
In fact I did the same I didn't menioned all the stuff with connecting to PC, copying files to PC, extracting archives and copying back to the phone the boot.img file for subsequent flashing via TWRP. This is because I know the forum members here are experienced guys
The lesson learned is that TWRP is rock solid and we shall trust to it
---------- Post added at 23:37 ---------- Previous post was at 23:36 ----------
Attila17 said:
How did you unzip the archive with TWRP?
Click to expand...
Click to collapse
See my last post. I didn't. I used a PC to do that.
I got really ****ed by magisk.
Did the recommended update and now I`m stuck at the fastboot screen
I can fastboot reboot but nothing else
how do I boot into twrp (power vol button down only brings fastboot)
I tried flashing twrp via fastboot but i get failed remote (unknow command)
any help please ?
Hey there,
I am currently struggeling with my Samsung Galaxy S7 (Exynos) device, running on superman rom (Android 8).
What happened?
For root I´m using Magisk Manager and for banking apps I have Magisk hide running. Then the program told me that there is an update (Magisk App) available. So, as always and recommended, I choosed "Direct Install" but that failed for some reason. OK I thought´, no problem. Later I wanted to reboot my phone but it didn´t. The screen says "Downloading.... Do not turn off device!". I only can enter "Download Mode" and "Recovery Mode via TWRP".
What I tried so far:
1) Wipe cache/dalvik --> not successful
2) Tried to do a factory reset via twrp --> not successful
3) Tried to flash BL via Odin --> not successful
At this time I realised that the same problem occured to my Galaxy Tablet SM-T580. So I came to the point that I did something wrong with updating magisk on both devides.
What I also tried next:
4) Tried to delete magisk modules via twrp --> not successful
5) Tried to uninstall magisk through twrp by downloading the latest Magisk app and rename it to "uninstall.zip" as recommended in installation guide --> Not successful because of Error installing zip file: Unsupported /Unknown image format (unpacking image format)
What can I do next?
Can anyone please help me, since I have two bricked devices now????
A simple kernel flashing would fix the problem, extract the original boot.img of your current ROM, and flash it via TWRP.
Cause it is clearly a problem with your boot.img, if that didn't work (I'm sure it will), then just dirty flash your current ROM.
P.S. If you are encrypted, you might encounter an error doing a simple factory reset, you'll have to format the whole data partition.
Hi @Mohamedkam000,
many thanks for your help. After hours of browsing the web and trying various methods I was able to get my 2nd device (Samsung Galaxy Tab A from 2016) back to life.
What I did: I installed the latest samsung mobile phone drivers on my PC then I connected the tablet to it. I was able to access the internal memory and in the folder "data" Magisk put a backup of the original boot.img. So I installed this "boot.img" via TWRP and voila.......everything works fine again
I´m very happy now.
But unfortunately this method didn´t work with my Samsung Galaxy S7. I just couldn´t find any boot.img file on the phone.
Mohamedkam000 said:
A simple kernel flashing would fix the problem, extract the original boot.img of your current ROM, and flash it via TWRP.
Cause it is clearly a problem with your boot.img, if that didn't work (I'm sure it will), then just dirty flash your current ROM.
Click to expand...
Click to collapse
How do I have to do this? Sorry I´m a little unexperienced so could I get a kind of an step by step guide please?
Mohamedkam000 said:
P.S. If you are encrypted, you might encounter an error doing a simple factory reset, you'll have to format the whole data partition.
Click to expand...
Click to collapse
Don´t understand this. Could you please explain again?
Thank you so much already.
Kind regards,
cap.
capitarider said:
Hi @Mohamedkam000,
many thanks for your help. After hours of browsing the web and trying various methods I was able to get my 2nd device (Samsung Galaxy Tab A from 2016) back to life.
What I did: I installed the latest samsung mobile phone drivers on my PC then I connected the tablet to it. I was able to access the internal memory and in the folder "data" Magisk put a backup of the original boot.img. So I installed this "boot.img" via TWRP and voila.......everything works fine again
I´m very happy now.
But unfortunately this method didn´t work with my Samsung Galaxy S7. I just couldn´t find any boot.img file on the phone.
How do I have to do this? Sorry I´m a little unexperienced so could I get a kind of an step by step guide please?
Don´t understand this. Could you please explain again?
Thank you so much already.
Kind regards,
cap.
Click to expand...
Click to collapse
Glad your tablet revived again.
Magisk creates a backup of the boot.img found just before flashing magisk, it is compressed in gzip format, so you need to pull it, extract it, and push it back to the phone, then flash it.
The file is usually in /data/stock_boot_${SHA1}.img.gz
You can extract it using the built-in terminal of TWRP, if PC is not accessible at the moment by writing and executing the following command:
gunzip {stock-boot-name}.gz
Replace {stock-boot-name} with your backed-up boot name (without the curleybrackets), or you can use the following command:
gunzip *.gz
That'll extract the gzip archive, and the boot.img will be in /data of which you can navigate to it and flash it.
There's another guaranteed method, if you have the file of the ROM you're using right now, you can just open it (it's just a zip archive) and search for the boot.img of your specific phone model and flash it.
Another guaranteed method will be by flashing a custom kernel compatible with your current ROM, like Moro AiO kernel, of which has a wide support for ROMs starting from Oreo, and up to Q, AOSP, or stock-based, just in one file.
Moro's thread: Moro Kernel
you can't access kernel backup because TWRP does not support encryption and Magisk Manager might removed encryption in boot
aIecxs said:
you can't access kernel backup because TWRP does not support encryption and Magisk Manager might removed encryption in boot
Click to expand...
Click to collapse
Doesn't seem like he's encrypted, he found the boot backup of his tablet in /data so he has probably searched for a similar file on his S7, but since it is compressed, he won't find it solely.
Also he would've told us that his /data is empty or something.
start from scratch with older magisk, current 22 has bug
https://github.com/topjohnwu/Magisk/issues/4008
Thank you for your help.
I had a n old twrp backup on another external hard drive. I extracted the boot file and repached it with 7zip to boot.img and flashed through twrp. That also didn´t work for various times. TWRP always said "failed".
In the end I didn´t manage it to bring my phone back to live. Anyway, I decided to flash the latest LineageOS (Android 11) and now its running smooth again.
Thanks again.
Try using sp flash tools flashing the boot.img