HELP! S8 won't boot up! - Samsung Galaxy S8 Questions and Answers

I've messed everything up and now I'm devastated!
My S8 stucks at the very first screen (where it says: SAMSUNG GALAXY S8 - powered by android). It doesn't boot further this very specific screen. I have tried to update Magisk and Magisk Manager but only Magisk Manager seems to get updated successfully while the app suddenly says that the latest version of Magisk Manager required Magisk V19.XX hence I've tried to install it via TWRP. According to log screen, I've managed to install magisk via TWRP but after booting up, I opened Magisk Manager where it now says that Magisk isn't installed. I therefore boot into TWRP and tried to fix it since some apps of mine that required root access wasn't working anymore. So, I thought I must have lost root access. I once again boot into recovery, I uninstalled magisk and install an older version of magisk and magisk manager and also the no_verity patch. After that my Galaxy S8 won't boot up. It just stucks at the very first screen. My S8 (international version) is still on Nougat stock samsung firmware and I can enter TWRP but the phone remains freeze and stubbornly refused to boot up.
I'm quite devastated and I hope you guys can help me fix this issue!
Thank you!

Hi, well sorry if I am stating the obvious but I would format and install one of the many custom roms available...

tosmaniac said:
Hi, well sorry if I am stating the obvious but I would format and install one of the many custom roms available...
Click to expand...
Click to collapse
Are there any solutions other than flashing a custom rom? Meanwhile, I have managed to flash Android 9 via ODIN and have TWRP installed but it won't boot up and stucks at the very first booting screens.
Any help would be appreciated!
Thanks!

cocolish said:
Are there any solutions other than flashing a custom rom? Meanwhile, I have managed to flash Android 9 via ODIN and have TWRP installed but it won't boot up and stucks at the very first booting screens.
Any help would be appreciated!
Thanks!
Click to expand...
Click to collapse
Have you tried just flashing stock rom only to see if it boots up. You may have to do a clean install.
Problem sounds like you haven't decrypted phone and flashed no verity zip file.
You won't need to flash a custom rom to fix this.
As for magisk have a look through this very helpful guide for installs and troubleshooting.
https://www.didgeridoohan.com/magisk/HomePage

I've managed to solve this issue by myself. But still, thank you so much! It's the thought that counts ? And yes, I've figured out that I haven't decrypt my S8. But everything is absolutely fine now and I feel extremely relieved. It took me 1 day to fix this major issue and I've encountered lots of difficulties while trying to fix this like bootloops, system won't boot up and managed to stuck at the very first booting screen again and the phone boot past the first booting screen and stucks at the second booting screen, and also bootloader error and stuffs like where realization hit me that I can't restore my nandroid backup while still on Nougat because after restoring it won't boot up. I therefore managed to flash Android 9 and twrp. My S8 is now on Android Pie with custom recovery and rooted (via Magisk).

Related

OP2 cannot upgrade from Oxygen OS 2.2.1/Cannot flash TWRP versions newer than 3.0.2-0

So.... Pokemon Go has a lot to answer for......
I have run into a really strange problem when trying to install an OTA on my *unrooted* Oneplus 2. I have been trying to fix this for days but I have completely run out of ideas.
I originally had a working stock Oxygen 3 (Marshmallow) rom with TWRP recovery on my device (not sure of the version). The device was rooted and apart from not being able to install OTAs, I was fairly happy with the setup. Then along came the Pokemon GO update that banned rooted devices. Ok, "big deal" I thought. I was quite content playing Ingress instead (a far better game by the way that doesn't rely on a "pay to win" structure). I really wasn't too worried but then I found out about "systemless root" and "Magisk". I thought that if I installed this correctly I could still play a bit of Pokemon GO when I wanted to and could toggle a root button in Magisk Manager to install OTAs when they became available.
This is where the problems started.
I followed a guide on how to unroot and install Magisk and "Phh's Superuser". The problem was that the Phh Superuser was being denied permissions for Magisk Manager, there were no pop up notifications prompting me to give it access, just toast notifications. I couldn't for the life of me figure out how to give it permission so the "enable root" slider button kept sliding back, not allowing root. This is when I used SuperSU ver 2.76 (Magisk version) and it seemed to work fine. I now had a stock Marshmallow rom with TWRP and Magisk Manager all working exactly how they should be. I could toggle root and play Pokemon GO, then return to a rooted state when I needed to.
"Awesome, mission accomplished." I thought. Now I just need to toggle root off, download the latest OTA and install it through Flashfire.
First I made a complete nandroid backup (as I've done with other devices many times before) through TWRP. I even copied the backup folder to my PC in case something went wrong.
Well, this is when the nightmare started.
The first mistake I made was to use Flashfire when it clearly stated that Oneplus devices were currently untested. Not sure if it was a big issue or not, but it was a mistake none the less. The second mistake I made was to not stop the stock recovery being replaced when prompted before the reboot. I assumed (and it even states in the app) that the custom recovery should be reverted back to the stock recovery when attempting to apply OTA updates.
So I went ahead and rebooted, waiting for the OTA to install. I'm fairly sure from memory that it went into the stock recovery, flashed the OTA and restarted.
This is when the phone soft bricked.
"Oh well, that is why I made the backup." I thought.
I reflashed TWRP in fastboot mode and attempted to restore my backup. No dice, the phone was still soft bricked.
(And by "soft bricked" and "boot looping" I mean the Oneplus logo was in the middle of the screen, "Powered by Android" was at the bottom and the two blue LEDs for the buttons either side of the fingerprint scanner/home button remained on. This for me was the tell tale sign of the soft brick because these two light go off after a few seconds after rebooting usually.
So from here I have tried EVERYTHING. All I really want now is a working stock (rooted) Marshmallow rom with TWRP. I have downloaded many different full rom zips and attempted to flash them through TWRP with no success, I have returned to stock recovery and tried flashing signed roms with no success, I've even tried flashing the official CM13 rom for Oneplus 2 (with the correct GAPPs and kernel) through TWRP with no luck.
But here is where it gets interesting......
There are a few things that are really weird...
1. I have always been able to get into Fastboot mode and ADB and Fastboot commands "work".
* Operations succeed but don't stick (for example trying to flash TWRP versions 3.0.2-1 and 3.0.2-2 through Fastboot mode result in no recovery being there at all.
2. I can flash TWRP recovery though Fastboot mode but ONLY VERSIONS 3.0.2-0 and lower. I can also successfully flash the stock recovery.
3. I can flash OxygenOS 2.2.1 but NOT ANY VERSION RELEASED AFTER THAT. Doing so results in the soft brick "bootloop" I mentioned earlier.
4. Attempting to flash the official CM13 rom for Oneplus 2 doesn't work either. Originally I got the error 7 message, but after editing "Updater-script" in the rom and re-zipping, the process seemed to work fine in TWRP but the reboot gave me... you guessed it... a softbrick.
I have flashed custom roms on a few different devices before so I'm not a COMPLETE newbie when it comes to this stuff, but I am by no means a developer or even anything close to one. I have bricked this phone in the past (long story, involved getting it without an invite and it being shipped to me with spyware on it) but I used a guide very similar to this and it worked a treat.
www(dot)androidbrick(dot)com/unbrick-oneplus-one-two-3-qualcomm-hs-usb-qdloader-9008
So, thinking that this process would format all partitions and start me from scatch I tried it. It worked fine but I was still unable to upgrade from Oxygen OS 2.2.1 or install TWRP versions 3.0.2-1 or 3.0.2-2.
I have tried all sorts of things. I have wiped, flashed and wiped again. Factory resets, dirty flashes, clean flashes.... everything. All sorts of different sources for the TWRP images and Oxygen roms... nothing seems to work.
It's just so weird considering it's not a hard brick... just a soft brick.
So I really need my phone so I am sitting on this current build because it is the only one that works.
Here are some details of the current build I am using. (using CPU-Z app)
Model: Oneplus 2 (ONE A2001)
Android version: 5.1.1
Oxygen OS version: 2.2.1
Bootloader: Unknown
Build ID: ONE A2001_14_160226
Java VM: ART 2.1.0
OpenGL ES: 3.1
Kernel Architecture: aarch64
Kernel version: 3.10.49-perf+ (56)
Root access: Yes
Super user app: SuperSU Free v2.46 (Chainfire)
OEM unlocking: Enabled
USB debugging: Enabled
And these are some of the ZIPs and IMGs that refuse to be flashed to my device.
TWRP-3.0.2-1-oneplus2
TWRP-3.0.2-2-oneplus2
Grarak's TWRP recovery IMG for Oneplus2 (modified to install CM13) according to this guide:
missingtricks(dot)net/oneplus-2-official-cyanogenmod-13
cm-13.0-20160924-NIGHTLY-oneplus2
OnePlus2Oxygen_14_OTA_019_all_1606041303_bd42fc5cc5cc4ab2
And also my TWRP backup named 2016-09-16--09-44-09
I am really at a loss as to what to do next. ANY help ANYONE could give me would be greatly appreciated. I have been all over the net looking for ways around this bt have had no luck.
As I've said, I'm not a huge tech head, but I'm not a newbie either. The only thing I can think of is that somehow one of the partitions (maybe boot? ) may have been corrupted somehow when messing around with systemless root. But I don't know how considering it's "systemless". If anyone knows how to check for corrupted partitions on the Oneplus 2 please let me know and I'll try it. Maybe formatting these partitions might help (????), but I don't want to permanently brick my phone.
But I don't know how I've got this particular build working if one of the partitions has been corrupted. And the corrupted partition thing is just a guess.....
Please, anyone, someone point me in the right direction. Again, any and all feddback is welcomed and would be very much appreciated.
This is all Pikachu's fault.
Kamakiriash said:
A very long post...
Click to expand...
Click to collapse
The normal way too update from OOS 2 to OOS 3 is:
Flash the OOS 3 signed flashable zip via TWRP to update the bootloader and firmware
Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option
Reboot recovery via TWRP so that you now have a recovery that's compatible with the new bootloader
Wipe data, cache & dalvik-cache (but not internal storage)
Flash the OOS 3 signed flashable zip again to update the system
Flash one of the modified SuperSU zips if you want root
Reboot system
All the files you need are in post #1 of this thread.
Thank you so much Spannaa!
I was clearly missing a vital step here and let it be a lesson to anyone else in this situation....
As Spannaa said......
1. Flash the OOS 3 signed flashable zip via TWRP to update the bootloader and firmware
2. Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option
3. Reboot recovery via TWRP SO THAT YOU NOW HAVE A RECOVERY THAT'S COMPATIBLE WITH THE NEW BOOTLOADER!
4. Wipe data, cache & dalvik-cache (but not internal storage)
5. Flash the OOS 3 signed flashable zip AGAIN to update the system.
Again, thankyou Spanna for your quick and accurate response.
The order in which you flash zips and imgs is very important it seems.
You really saved me.
I restored the TWRP backup and I am back to where I started.
Is it now possible to apply OTAs when I toggle the root off in Magisk manager and install using the stock recovery? What do you think would be the best way to do this?
And would it be worth moving to the official build of CM13 for Oneplus 2?
Thanks again, Spannaa. :victory:
Kamakiriash said:
Thank you so much Spannaa!
I was clearly missing a vital step here and let it be a lesson to anyone else in this situation....
As Spannaa said......
1. Flash the OOS 3 signed flashable zip via TWRP to update the bootloader and firmware
2. Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option
3. Reboot recovery via TWRP SO THAT YOU NOW HAVE A RECOVERY THAT'S COMPATIBLE WITH THE NEW BOOTLOADER!
4. Wipe data, cache & dalvik-cache (but not internal storage)
5. Flash the OOS 3 signed flashable zip AGAIN to update the system.
Again, thankyou Spanna for your quick and accurate response.
The order in which you flash zips and imgs is very important it seems.
You really saved me.
I restored the TWRP backup and I am back to where I started.
Is it now possible to apply OTAs when I toggle the root off in Magisk manager and install using the stock recovery? What do you think would be the best way to do this?
And would it be worth moving to the official build of CM13 for Oneplus 2?
Thanks again, Spannaa. :victory:
Click to expand...
Click to collapse
Glad you're sorted.
Not sure about Magisk as I've never used it.
CM13 is OK but whether it's worth you moving to it is your choice. Personally, I prefer TipsyOS!
Hi,
I face the exact issue with same Oxygen OS and TWRP versions mentioned, I have tried the above steps but there are some problems:
1. Flash the OOS 3 signed flashable zip via TWRP to update the bootloader and firmware
Click to expand...
Click to collapse
when I checked the option (Zip signature verification) in TWRP, the installation failed with error "Zip signature verification failed! Error installing zip file '/sdcard/oneplus.zip'", but it's successfully installed when I unchecked (Zip signature verification) option.
2. Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option
3. Reboot recovery via TWRP SO THAT YOU NOW HAVE A RECOVERY THAT'S COMPATIBLE WITH THE NEW BOOTLOADER!
Click to expand...
Click to collapse
second problem is that after installing the TWRP 3.0.2-2 (or above), then reboot recovery, I can't access the recovery again and the phone stuck on bootloop.
any idea ?
Aood said:
Hi,
I face the exact issue with same Oxygen OS and TWRP versions mentioned, I have tried the above steps but there are some problems:
when I checked the option (Zip signature verification) in TWRP, the installation failed with error "Zip signature verification failed! Error installing zip file '/sdcard/oneplus.zip'", but it's successfully installed when I unchecked (Zip signature verification) option.
second problem is that after installing the TWRP 3.0.2-2 (or above), then reboot recovery, I can't access the recovery again and the phone stuck on bootloop.
any idea ?
Click to expand...
Click to collapse
I don't have a OP2 anymore but that post was seven months ago and the instructions worked for numerous users.
Don't enable zip signature verification in TWRP - it's unnecessary.
Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option and then reboot recovery directly from TWRP.
thanx for replay Spannaa,
Flash TWRP 3.0.2-2 via your current TWRP's recovery image flashing option and then reboot recovery directly from TWRP.
Click to expand...
Click to collapse
I have already did that, but same issue once I reboot "directly from TWRP" , the TWRP doesn't show up and bootloop start again.
Aood said:
thanx for replay Spannaa,
I have already did that, but same issue once I reboot "directly from TWRP" , the TWRP doesn't show up and bootloop start again.
Click to expand...
Click to collapse
Last chance and then I'll leave this for someone that has the OP2.
Are you rebooting recovery "directly from TWRP" or rebooting system?
Is your bootloader still unlocked?
Last chance and then I'll leave this for someone that has the OP2.
Are you rebooting recovery "directly from TWRP" or rebooting system?
Is your bootloader still unlocked?
Click to expand...
Click to collapse
Yes, rebooting recovery "directly from TWRP"
and bootloader loader is unlocked,..
anyway it's not important to fix the phone, it's almost one year since last time I use it, yesterday I saw it in the drawer and try to figure out the issue..,

TWRP and stock Nougat hangs at Samsung logo, trying to root phone

Just installed Nougat stock ROM for my S7 Edge with ODIN, and trying to root.
I installed TWRP latest version 3.01 and immediately after installed supersu 2.79 SR3 from TWRP.
At first I could not boot the phone because it kept saying I used the wrong PIN code for boot. I reflashed stock rom and was able to boot again (same PIN) - disabled PIN on boot, and reflashed TWRP and supersu, but it keeps hanging at the Samsung Logo.
Flashing stock rom solves it, but I still want to root it..
What am I doing wrong?
currently there is no reliable root for nouget roms. It is being worked on.
Cosmic Blue said:
currently there is no reliable root for nouget roms. It is being worked on.
Click to expand...
Click to collapse
Thanks for replying.
In this case - even if the goal is to root - it seems the problem is with TWRP.. Even if I do not root, but just install TWRP, the neverending bootlogo shows up..
Nougat OS has been changed that all the old rooting and twrp need to be updated.
It will be a while till developers can modify the os to allow changes.
Have posted the same question in the TWRP S7 thread that I did not see before posting this one - sorry

"System" deleted, mild softbrick. Best way to fix?

I am no noobie when it comes to android rooting since I root and flash all of my android devices. But the axon 7 is a really tough son of a b*tch.
I got it brand new. Unlocked the bootloader then proceeded to update to marshmallow just so I can get nougat on my device. Then I installed TWRP so I can flash supersu, xposed and an audio mod zip. I believe this audio mod is what killed my devices since it was not booting into the os. Just stuck at the flashy axon booting screen. I booted into TWRP, deleted data, system and system storage and installed the nougat 2,6gb "update.zip" file. Since then the os is not booting at all, its just stuck at the booting screen, the warning because of the unlocked bootloader. And also, now, stock recovery is installed.
I have an idea how to fix this I am rather cautious so thats why Im asking the experts here first
EDIT: I have the 2017G Version
I have an A2017U, but if you can get your hands on an official Marshmallow zip, then that should hopefully let you boot. From there you can OTA update back to Nougat, then you just need to figure out how to install TWRP again.
Another recovery method is to flash EDL files with MiFlash while your phone is booted into EDL mode.
As for audio mods, I just use Arise, it's very comprehensive and has never bricked my phone.
I have an idea why you can't boot after flashing the Nougat zip: you triggered dm-verity. You must also flash a root zip that patches out the dm-verity. Or you can use @jcadduono's "no verity opt encrypt" zip as an alternative if you don't want to root. Your system and cache partitions should be formatted as ext4, and data should be F2FS. I recommend a full wipe of all partitions except the MicroSD.
GriechischerYoghurt said:
I am no noobie when it comes to android rooting since I root and flash all of my android devices. But the axon 7 is a really tough son of a b*tch.
I got it brand new. Unlocked the bootloader then proceeded to update to marshmallow just so I can get nougat on my device. Then I installed TWRP so I can flash supersu, xposed and an audio mod zip. I believe this audio mod is what killed my devices since it was not booting into the os. Just stuck at the flashy axon booting screen. I booted into TWRP, deleted data, system and system storage and installed the nougat 2,6gb "update.zip" file. Since then the os is not booting at all, its just stuck at the booting screen, the warning because of the unlocked bootloader. And also, now, stock recovery is installed.
I have an idea how to fix this I am rather cautious so thats why Im asking the experts here first
EDIT: I have the 2017G Version
Click to expand...
Click to collapse
If you still have TWRP, download Raystef66's B09 TWRP flashable Stocksystem and Bootstack, plus Magisk 15.2. Flash everything then wipe data.
What broke your device was probably Xposed.
Also, which audio mod are you talking about? Ainur, V4Android, V4ARISE, AK4490 patch, maybe some other?
Thanks for the help! i Managed to flash TWRP in EDL mode (black screen). Then I proceeded to flash nougat B9. I was up all night reading about it and searching tutorials how to flash stock from TWRP. I installed Bootstack and System, supersu 2.79 and xposed. First boot did not work but that was actually in the guide so I had to flash system and root again. My data partition is ext4 and everything works good now. I hope it wont make any problems.
The audio mod was "divine 10" or something. I will try the ones you have mentioned.
Thanks for all the help
GriechischerYoghurt said:
Thanks for the help! i Managed to flash TWRP in EDL mode (black screen). Then I proceeded to flash nougat B9. I was up all night reading about it and searching tutorials how to flash stock from TWRP. I installed Bootstack and System, supersu 2.79 and xposed. First boot did not work but that was actually in the guide so I had to flash system and root again. My data partition is ext4 and everything works good now. I hope it wont make any problems.
The audio mod was "divine 10" or something. I will try the ones you have mentioned.
Thanks for all the help
Click to expand...
Click to collapse
Xposed usually needs a 2 or 3 minute first boot for some reason, just sayin

Trouble with unrooting and boot loops

Hey there!
So i thought it would be easy to unroot my S7 Edge SM-G935F on magisk or superSU without wipe all the data.... until i wanted to do so two days ago :silly:
Problem is no matter what "official" variation i use for magisk (uninstaller flashed in twrp or full uninstall / switch images in the manager) or superSU (option in the app) im getting a boot loop. can only get out of it when i reinstall magisk or superSU via twrp.
Today i found a flashable uninstaller for superSU, used it and it workted without causing the loop but it says i needed to reflash the original boot.img. but when im flashing the boot.img that i can find within the "AP" part from the decompressed rom im using its again boot loop time.
(After that ive tried to fix the loop caused under magisk uninstaller with flashing the boot.img out of the rom under twrp afterwards... but its looping on)
i realy dont understand that and its pretty frustrating because i've tried so many different things but all the time it ends in the loop.
hope someone can help me with that! :crying: (Rom is from Sammobile G935FXXS2DRA9_G935FDBT1DQJ1_DBT)
thanks for your time and answer
greetings
Chris

Lost root access and can't get it back via Magisk. Help!

Galaxy S8 Exynos [SM-G950FD] Android Oreo 8.0.0
Hello. it's my first time posting here. So I've had a successful attempt at flashing TWRP and Magisk into my phone. Today I accidentally plugged in my charger while it was in the process of rebooting, so it entered my device into kind of a bootloop. I solved this by going into Download Mode and pressing 'Cancel', which prompted my device to successfully reboot and work again.
The problem is that I've somehow lost my root. None of my apps can get root access, CPU-Z says no root available, and Magisk Manager said "Magisk is not installed". Idk how I got to this because yesterday all was working, I assume it's because I got a bootloop or went into Download Mode.
I tried to install the official Magisk ZIP file from the Manager, go into recovery mode, and flash it via TWRP. Unfortunately this didn't work. This is the only solution I can come up with besides reflashing Stock and having to flash Magisk again and wipe all my current data. If anyone has any suggestions please comment down below as I'm kinda stuck rn. They would be greatly appreaciated!

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