Root Failure on my C9 Pro in Android 8.0.0 Oreo

[jasonc417]

Hi guys. This is my first post on XDA.

Now I've got C9 Pro, and hours ago I just got it flashed with the latest Android 8.0.0 ROM, version: C9000ZHU1CRG9.
Also I managed to flash TWRP. Then I started doing the Root things with TWRP, as I had done on Android 7.1.1.
However, I did get issue while doing the Root on Android 8.0 --
Actually the SuperSU was flashed successfully, but after this, the phone kept restarting, failing to enter the OS.
I am definitely sure I did the Root with the right steps.
Also I tried different versions of SuperSU, still the issue existed.
Then I flashed Magisk instead, no use.
I even used other versions of TWRP, still no use!
......
Finally, I quitted, flashing the former Android 7.1.1 ROM.

I can't use a phone without Root, but I really want to experience Android 8.0.0.
Can someone offer me any solution?
Thanks a lot in advance!

 

[aboyazan78]

there is a new twrp for oreo try it . it may fix your problem

---------- Post added at 12:58 AM ---------- Previous post was at 12:56 AM ----------

Thanks to @travis82
Try this
https://forum.xda-developers.com/showpost.php?p=77344461&postcount=131

 

[jasonc417]

there is a new twrp for oreo try it . it may fix your problem

---------- Post added at 12:58 AM ---------- Previous post was at 12:56 AM ----------

Thanks to @travis82
Try this
https://forum.xda-developers.com/showpost.php?p=77344461&postcount=131

I already tried the TWRP you introduced, no use, the issue still exists.

 

[hatib237]

try the latest 3.2.3 and tell if it worked

 

[aboyazan78]

I suggest to flash a clean oreo via odin then flash the latest twrp from @travis82 then do format data and wipe cache and data from twrp recovery
then install the latest magisk
hope u the best @jasonc417
keep updated

 

[jasonc417]

try the latest 3.2.3 and tell if it worked

You know what, I already tried TWRP 3.2.3, but failed!:crying:

 

[[email protected]]

I have tried almost every combination ended up getting bootloop always except when I tried these;
1. Install stock firmware and csc (not home csc this will fully wipe the phone)
2. After finishing it enters to recovery and updates the system. Keep hold of pressing the volume down+home key to enter to download mode as soon as it finishes installing system update.
3. install twrp from here https://www.androidfilehost.com/?fid=1322778262903985796 (original thread https://forum.xda-developers.com/c9-pro/development/twrp-c9ltechn-t3646970 sometimes links can be dead. In that case you can find new link from that thread).
4. Keep holding of pressing Volume Up+Home key while installing twrp to boot into recovery as soon as the phone reboots.
5. While in recovery flash this SuperSU https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 (Located in this thread https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 as "*** Xperia users, and others experiencing bootloops ***
Please use this version instead: "

Your phone should boot normally to setup screen.
After You finish setup you should see supersu icon and your phone should be rooted.

I haven't tested but if your phone is in working condition right now you can try from step 3 to not lose your data.
Good Luck -

 

[jasonc417]

Thanks for your method. I think I made it finally!

I have tried almost every combination ended up getting bootloop always except when I tried these;
1. Install stock firmware and csc (not home csc this will fully wipe the phone)
2. After finishing it enters to recovery and updates the system. Keep hold of pressing the volume down+home key to enter to download mode as soon as it finishes installing system update.
3. install twrp from here https://www.androidfilehost.com/?fid=1322778262903985796 (original thread https://forum.xda-developers.com/c9-pro/development/twrp-c9ltechn-t3646970 sometimes links can be dead. In that case you can find new link from that thread).
4. Keep holding of pressing Volume Up+Home key while installing twrp to boot into recovery as soon as the phone reboots.
5. While in recovery flash this SuperSU https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 (Located in this thread https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 as "*** Xperia users, and others experiencing bootloops ***
Please use this version instead: "

Your phone should boot normally to setup screen.
After You finish setup you should see supersu icon and your phone should be rooted.

I haven't tested but if your phone is in working condition right now you can try from step 3 to not lose your data.
Good Luck -

 

[jasonc417]

There is, however, one problem with the given TWRP:
Before flashing SuperSU, I did format, or exactly, mount /data.
But when the phone was rebooted again, /data resumed unmounted, resulting in failure in flashing other ZIPs (It said "unable to mount /system").
Then I got the phone rebooted, the terrible bootloop occurred again!
That is to say, we have to flash all ZIPs in one time after mounting /data without rebooting the phone, but sometimes this is not possible.
Now my phone has gone back again to Android 7.1.1, and I think I have to wait for an official TWRP that supports Android 8.0 thoroughly on C9 Pro!

I have tried almost every combination ended up getting bootloop always except when I tried these;
1. Install stock firmware and csc (not home csc this will fully wipe the phone)
2. After finishing it enters to recovery and updates the system. Keep hold of pressing the volume down+home key to enter to download mode as soon as it finishes installing system update.
3. install twrp from here https://www.androidfilehost.com/?fid=1322778262903985796 (original thread https://forum.xda-developers.com/c9-pro/development/twrp-c9ltechn-t3646970 sometimes links can be dead. In that case you can find new link from that thread).
4. Keep holding of pressing Volume Up+Home key while installing twrp to boot into recovery as soon as the phone reboots.
5. While in recovery flash this SuperSU https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 (Located in this thread https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 as "*** Xperia users, and others experiencing bootloops ***
Please use this version instead: "

Your phone should boot normally to setup screen.
After You finish setup you should see supersu icon and your phone should be rooted.

I haven't tested but if your phone is in working condition right now you can try from step 3 to not lose your data.
Good Luck -

 

[shokolatha]

I have tried almost every combination ended up getting bootloop always except when I tried these;
1. Install stock firmware and csc (not home csc this will fully wipe the phone)
2. After finishing it enters to recovery and updates the system. Keep hold of pressing the volume down+home key to enter to download mode as soon as it finishes installing system update.
3. install twrp from here https://www.androidfilehost.com/?fid=1322778262903985796 (original thread https://forum.xda-developers.com/c9-pro/development/twrp-c9ltechn-t3646970 sometimes links can be dead. In that case you can find new link from that thread).
4. Keep holding of pressing Volume Up+Home key while installing twrp to boot into recovery as soon as the phone reboots.
5. While in recovery flash this SuperSU https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 (Located in this thread https://forum.xda-developers.com/attachment.php?attachmentid=4164510&d=1496008012 as "*** Xperia users, and others experiencing bootloops ***
Please use this version instead: "

Your phone should boot normally to setup screen.
After You finish setup you should see supersu icon and your phone should be rooted.

I haven't tested but if your phone is in working condition right now you can try from step 3 to not lose your data.
Good Luck -

I tried your guide & used Magisk v17.2 instead of SuperSU at step 5 & successfully resolved the bootloop problem, but I did encounter the problem of data not mounting even after flashing ashyx_dm-verity zip:

There is, however, one problem with the given TWRP:
Before flashing SuperSU, I did format, or exactly, mount /data.
But when the phone was rebooted again, /data resumed unmounted, resulting in failure in flashing other ZIPs (It said "unable to mount /system").
Then I got the phone rebooted, the terrible bootloop occurred again!
That is to say, we have to flash all ZIPs in one time after mounting /data without rebooting the phone, but sometimes this is not possible.
Now my phone has gone back again to Android 7.1.1, and I think I have to wait for an official TWRP that supports Android 8.0 thoroughly on C9 Pro!

If anybody has a solution for this problem I'd be glad to here it

 

[AL_IRAQI]

Follow those steps

 

[jasonc417]

I tried your guide & used Magisk v17.2 instead of SuperSU at step 5 & successfully resolved the bootloop problem, but I did encounter the problem of data not mounting even after flashing ashyx_dm-verity zip:



If anybody has a solution for this problem I'd be glad to here it

2 days ago I flashed again the Android 8.0 ROM into my C9 Pro with Root successfully, through which I found the actual problem:
The given TWRP only supports the specific SuperSU zip, and while I flash other zip files, the bootloop occurs again. That's why I surrender flashing Xposed zip.

 

[shokolatha]

Follow those steps

Well done
I can confirm that I have enabled mounting data partition in TWRP after using your mentioned Disable_Dm-Verity_ForceEncrypt_09.02.2018 zip file, Although I haven't followed your steps exactly
I have mentioned my steps in earlier reply.
Thanks

 

[jasonc417]

Follow those steps

Thanks first.
Well, I do have a question: can I flash other zip files, like Xposed, with your given TWRP without phone bootloop?
Thanks!

 

[SRISRIANDROID]

New thread with root guide on oreo (8.0) step by step with required files would be appreciable.

 

[jasonc417]

Follow those steps

Last night I tried this again following the steps, and finally the flash of Xposed and other 3rd-party zip were successfully!
Only one problem: an app named "Toggle Data" could not be run properly.

Again, thanks a lot!

 

[[email protected]]

How to do, C9 Pro with Root successfully?

2 days ago I flashed again the Android 8.0 ROM into my C9 Pro with Root successfully, through which I found the actual problem:
The given TWRP only supports the specific SuperSU zip, and while I flash other zip files, the bootloop occurs again. That's why I surrender flashing Xposed zip.

Can you explain, how to root C9 Pro with Androis 8.0 ROM.

Thanks a lot.
Murat

 

[YusufGKT]

Can you explain, how to root C9 Pro with Androis 8.0 ROM.

Thanks a lot.
Murat

You need to download and install travis's twrp after that format data , flash magisk 17.2 , flash dm verity and reboot

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[[email protected]]

You need to download and install travis's twrp after that format data , flash magisk 17.2 , flash dm verity and reboot

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Hmmm, I don't want to format data. If find another way, better.

Thanks a lot,
Murat

 

[YusufGKT]

Hmmm, I don't want to format data. If find another way, better.

Thanks a lot,
Murat

Twrp doesnt support samsung encryption so ypu need to flash dm verity and that needs format data

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