Hey guys, Kyuubi10 here again.
Recently I had an issue with my nexus 9, which is becoming increasingly common.
Where one can permanently soft-brick their nexus, for lack of ticking the "Enable OEM unlock" button, then bootlooping their device while locking their bootloader, thus making it impossible to reflash a system image through fastboot.
If you're lucky enough to still be able to access your custom recovery your device is still salvageable, but if as me you were performing a factory reimage when you locked your bootloader chances are that you have gone back to stock recovery, and only after realised that your OS was bootlooping.
From reading about it, I found out that it was virtually unrecoverable, unless you managed to keep your custom recovery, by either flashing a new system or if your recovery refuses to flash new system you can use this: http://forum.xda-developers.com/nexu...nlock-t3113539.
But in all of these cases you still need a custom recovery.
At the end most people gave up and either bought another device or used their warranty to replace their device (Which I am trying to attempt, if my warranty isn't completely voided.)
So, finally reaching the important point of this thread, I have had a couple ideas which could work to solve this issue but since I don't have enough knowledge I am unable to actually test the idea.
For the device to recognize the lock status of the device even without an OS present means that there must be a flag the bootloader reads. By reading further I found this. http://newandroidbook.com/Articles/Nexus9.html
This basecally explains that Nexus 9 has a partition called PST (Persist) whose only job is to provide the value of this flag. I was wondering whether it is possible by using Linux could get a more direct access to the partition and change its binary value to enable the "enable OEM unlock" variable (Described by fastboot as "Ability is 0").
I had this idea because one day when I bootlooped another device and ADB on windows failed to recognize the device I booted linux and used ADB from there. And the phone was reconized.
This works because Linux can view partitions with different filesystems, where as windowns can only see partitions which have been formatted into "Windows" partitions (e.g. FAT32, NTFS).
So in theory using a Linux OS to access the different partitions in Android should show up much more information, and give you better access. But apart from this I don't know much more. I will be testing this theory out in more detail. But I am challenging the more experienced contributors out there to help out in overcoming this issue!
Please, this is a real issue which is limiting newer nexus devices. If anyone has any new ideas please share by commenting, and lets help each other out to find a solution to this problem.
Recently I had an issue with my nexus 9, which is becoming increasingly common.
Where one can permanently soft-brick their nexus, for lack of ticking the "Enable OEM unlock" button, then bootlooping their device while locking their bootloader, thus making it impossible to reflash a system image through fastboot.
If you're lucky enough to still be able to access your custom recovery your device is still salvageable, but if as me you were performing a factory reimage when you locked your bootloader chances are that you have gone back to stock recovery, and only after realised that your OS was bootlooping.
From reading about it, I found out that it was virtually unrecoverable, unless you managed to keep your custom recovery, by either flashing a new system or if your recovery refuses to flash new system you can use this: http://forum.xda-developers.com/nexu...nlock-t3113539.
But in all of these cases you still need a custom recovery.
At the end most people gave up and either bought another device or used their warranty to replace their device (Which I am trying to attempt, if my warranty isn't completely voided.)
So, finally reaching the important point of this thread, I have had a couple ideas which could work to solve this issue but since I don't have enough knowledge I am unable to actually test the idea.
For the device to recognize the lock status of the device even without an OS present means that there must be a flag the bootloader reads. By reading further I found this. http://newandroidbook.com/Articles/Nexus9.html
This basecally explains that Nexus 9 has a partition called PST (Persist) whose only job is to provide the value of this flag. I was wondering whether it is possible by using Linux could get a more direct access to the partition and change its binary value to enable the "enable OEM unlock" variable (Described by fastboot as "Ability is 0").
I had this idea because one day when I bootlooped another device and ADB on windows failed to recognize the device I booted linux and used ADB from there. And the phone was reconized.
This works because Linux can view partitions with different filesystems, where as windowns can only see partitions which have been formatted into "Windows" partitions (e.g. FAT32, NTFS).
So in theory using a Linux OS to access the different partitions in Android should show up much more information, and give you better access. But apart from this I don't know much more. I will be testing this theory out in more detail. But I am challenging the more experienced contributors out there to help out in overcoming this issue!
Please, this is a real issue which is limiting newer nexus devices. If anyone has any new ideas please share by commenting, and lets help each other out to find a solution to this problem.
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