i have my ta keys backed up but noticed you cant relock a bootloader when using a custom kernel is there any other way to restore my drm functions without going back to stock (its a kernel to get root thats all)
i have fw build number 34.3.a.0.252 (reason i needed root is disable the update notification)
not according to this post
https://forum.xda-developers.com/xperia-xz/how-to/how-to-unlock-bl-kernel-twrp-root-t3541648
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Hi,
I rooted my Z2 tablet a few days ago and have found that I don't really need the advantages it brings (from what I can tell). SO - I want to get it back to the way it was when I first opened the box.
I have seen threads about different devices and how to restore them to factory or stock (??), but they seem to call for specific files or flash software. So that brings me once again to this forum to figure out whether anyone can direct me to some instructions on how to do this. I figure it shouldn't be too hard. Just being careful.
Thanks very much for the advice once again.
I think if you flash the rootable kernel again, you could use an unrooting tool to undo the root. I'm also aware that there are files that you can flash to re-lock the bootloader (I once did this with an Xperia mini pro, although I'm not sure if such file exists for this tablet) but the DRM keys are lost forever a.f.a.i.k. But at least if you manage to re-lock the bootloader you will be able to install F/W upgrades through official ways again.
degraaff said:
I think if you flash the rootable kernel again, you could use an unrooting tool to undo the root. I'm also aware that there are files that you can flash to re-lock the bootloader (I once did this with an Xperia mini pro, although I'm not sure if such file exists for this tablet) but the DRM keys are lost forever a.f.a.i.k. But at least if you manage to re-lock the bootloader you will be able to install F/W upgrades through official ways again. Anyhow, you won't be able to restore to (more or less) factory status without at least flashing a couple of files.
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THank you for the response. Unfortunately i'm not even sure how I would go about flashing 'the rootable kernel'.... Feeling a bit foolish for getting into this actually.
From what i'm reading, it seems like I need to get the stock software and start again. So i'm looking for the 'FTF' for my tablet, which is a SGP511. Not having any luck though.
Which was the process that you followed to root it?
degraaff said:
Which was the process that you followed to root it?
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It was on another site - can't remember which. It got the clockwork mod installed. I think? Or was that just a recovery thing? No idea.
I'm actually now just doing a factory reset to see what happens, and it said 'root access possibly lost' in the process, which I thought was a good sign. Guess i'll keep tinkering with enough caution to eventually get the warranty back in tact.
Hopefully the loss of DRM doesn't effect the warranty.
In that case I guess you will have to download a firmware ftf file of an official unmodded firmware (preferably one of your region but I think especially if you have the wifi-only version it doesn't matter much as long as it contains the interface and input languages that you need), and install (or "flash") that using Flashtool. After that the root will certainly be gone and if you could then find a file to relock your bootloader I think your warrenty will be fine. I honestly don't think that Sony service and repair personel will check for DRM keys every time before repairing a device.
UPDATE
Factory reset appears to have gotten things back to normal. My plan is now just to unroot using an unroot tool (app i guess?) and then to lock the bootloader some how as well.
fearofbirds said:
Factory reset appears to have gotten things back to normal. My plan is now just to unroot using an unroot tool (app i guess?) and then to lock the bootloader some how as well.
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Click to collapse
So it's certain that the tablet is still rooted at this moment? Some superuser apps have an option to do a full unroot, such as SuperSU, you could try that
That's great. I think that's sorted it out. SuperSU had the full unroot option and it looks like it's all sorted.
Thanks for the help.
Hi i successfully rooted and backuped my TA, thanks to the guide written here. Unfortunately, the ending FW was for Z3 which really wasn't functional for my SGP621. I cannot revert to stock without losing root because it would overwrite kernel and system of the rooted FW now. My question is, is there a rooted stock kernel for unlocked BL where we can restore our DRM partitions and also maintain root at the same time?
infinitylook said:
Hi i successfully rooted and backuped my TA, thanks to the guide written here. Unfortunately, the ending FW was for Z3 which really wasn't functional for my SGP621. I cannot revert to stock without losing root because it would overwrite kernel and system of the rooted FW now. My question is, is there a rooted stock kernel for unlocked BL where we can restore our DRM partitions and also maintain root at the same time?
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Mate, follow the instructions on this link and you can have a rooted stock rom with TA restored no problem.
(http://forum.xda-developers.com/z3-...-to-rooted-stock-sgp621-firmware-drm-t3015494)
To gain read/write you'll need to run this script.No need to follow all the instructions there, allow usb debugging and run the bat file.
(http://forum.xda-developers.com/xperia-z2/general/4-4-4-sony-ric-killer-t2953141)
frostmore said:
Mate, follow the instructions on this link and you can have a rooted stock rom with TA restored no problem.
(http://forum.xda-developers.com/z3-...-to-rooted-stock-sgp621-firmware-drm-t3015494)
To gain read/write you'll need to run this script.No need to follow all the instructions there, allow usb debugging and run the bat file.
(http://forum.xda-developers.com/xperia-z2/general/4-4-4-sony-ric-killer-t2953141)
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Yeah already solved, mine
Sent from my SGP621 using XDA Free mobile app
Hello, my D6503 is getting pretty old right now, so I decided to install some custom soft on it. I need to unlock my bootloader, so I read a lot about that DRM Keys and backuping TA. Now I have 23.4.A.1.232 and I'm going to downgrade it to 17.1.2.A.0.314 which is rootable. The question is: Can I do the backup of TA Partition on 4.4.2 (17.1.2.A.0.314) and potentially restore it on 5.1 or newer? Or do I have to upgrade rooted 4.4.2 to rooted 5.1 and then do the TA backup to avoid version-conflict?
Thank you in advance!
Ta backup of 4.4.2 would work fine bt still for extra safety backup the TA on 5.1
I have restored ta backups on both KK and LP versions (while the backup itself is taken on KK) without any problems.
The android version shouldn't matter
Ok, I just unlocked my bootloader in Xperia Z1 5.1, and got it right. I proceeded to use the DRM restoration method, but unfortunately I wiped SYSTEM instead of DATA and it straight up destroyed everything. I started from the bottom again (downgrade root and upgrade) and install Xposed framework + the DRM restore but when I look at the service settings (*#*#SERVICE#*#*) > configuration, Root status is now displayed as Unknown? After I unlocked the bootloader the first time, it displayed correctly : Root Status and Bootloader unlocked YES, but now what could have happened?
That matters less than whether or not root is actually working. Do you have SuperSU installed? Does it say you need to update the binary when you go in it, perhaps? Have you tried Xposed or other root apps?
es0tericcha0s said:
That matters less than whether or not root is actually working. Do you have SuperSU installed? Does it say you need to update the binary when you go in it, perhaps? Have you tried Xposed or other root apps?
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I think I have figured it out. I saw that it comes with installing the DRM restoration, maybe some kind of trick included in the package to restore back the functions after unlocking the bootloader.
Hello first xperia device and its very nice. I unlocked bootloader and rooted but decided to go back to stock as there isn't any custom roms out here. After reverting using flashtool AND companion i checked DRM keys and it looks like they are back (Active). My question is how will i Find out for sure?
https://forum.xda-developers.com/xperia-1/help/xperia-1-drm-keys-locking-bootloader-t4079715