[Q] [CM] Install CM without unlocking bootloader

Anobiz · Jun 28, 2012 20 1 0

Hello all,

I have a question regarding my Xperia Z.

I would like to install Cyanogenmod 10.1 (Stable) for my Xperia Z but I do see some various kinds of methods.

1. By using fastboot (Don't know exactely what it does).
2. By using a custom recovery.

Now, my phone is rooted and I do have a custom recovery.

Can I flash Cyanogenmod without unlocking my bootloader? (I don't want to loose Bravia engine and Stamina mode) when I ever decide to go back to stock.

From what I understand, fastboot will flash the CM kernel (not possible with a locked bootloader) while the custom recovery only installs a rom without a kernel.

Does it mean that I will have the stock kernel but with CM rom on it?

A couple of questions comes to mind in total:

- Can I flash CM using custom recovery?
- How to return to stock rom if ever needed (Will i loose my Bravia Engine -> DRM keys)?
- How to update the kernel to a new stock kernel if needed while running CM?

Kind regards,

ckyy · May 22, 2013 at 2:11 PM

You can't. You need to unlock your bootloader in order to flash the cm kernel.

Sent from my C6603 using xda app-developers app

Anobiz · Jun 28, 2012 20 1 0

ckyy said:
You can't. You need to unlock your bootloader in order to flash the cm kernel.

Sent from my C6603 using xda app-developers app

But that does mean that I'll loose my DRM keys forever?
I don't want to lose them just in case I need to restore.

And if I unlock my bootloader, how do I exactely flash CM?

Kind regards

thalada · Jan 9, 2012 445 99 0

Anobiz said:
But that does mean that I'll loose my DRM keys forever?
I don't want to lose them just in case I need to restore.

And if I unlock my bootloader, how do I exactely flash CM?

Kind regards

Before unlocking, you can save your DRM keys with this method.

http://forum.xda-developers.com/showthread.php?t=2234627

Here is the updated version...

http://forum.xda-developers.com/showpost.php?p=41683557&postcount=672

Anobiz · Jun 28, 2012 20 1 0

thalada said:
Before unlocking, you can save your DRM keys with this method.

http://forum.xda-developers.com/showthread.php?t=2234627

Here is the updated version...

http://forum.xda-developers.com/showpost.php?p=41683557&postcount=672

Correct me if I'm wrong, but is the process then the following:

1. Root phone without unlocking bootloader.
2. Install CMW
3. Backup DRM keys.
4. Take Nandroid backup.
5. Save the files of the backups (3 & 4) in a safe location.
6. Unlock bootloader.
7. Flash CM.

For a restore:

1. Reflash stock rom.
2. Restore nandroid backup.
3. Restore backup of DRM keys.

Can you confirm that this process is correct, because I really want to install CM.

Is there a list somewhere (cannot find it on the official CM website) that lists me what kind of bugs there are in a specific CM version (what is not working)?

Kind regards,

ToinouAngel · May 30, 2012 93 21 0

Correct me if I'm wrong but weren't at least AOKP and ParanoidAndroid developed for locked bootloaders on other phones? If so, technically it should be possible with our Z, right?

SXUsr · May 22, 2013 at 5:19 PM

ToinouAngel said:
Correct me if I'm wrong but weren't at least AOKP and ParanoidAndroid developed for locked bootloaders on other phones?

I doubt it, but if they were they won't have been a true port.

ckyy · May 22, 2013 at 5:19 PM

Honestly, i don't understand the DRM thing. It's not like you lose important features. If you can unlock your bootloader, then do it. Not doing it would be like buying a Ferrari just for your Garage.

Sent from my C6603 using xda app-developers app

SXUsr · May 22, 2013 at 6:41 PM

ckyy said:
Honestly, i don't understand the DRM thing. It's not like you lose important features.

Just because they're not important to you doesn't mean they're not to others, and even if I could unlock I'd probably still be holding off in the hope that someone comes up with an S1Tool that allows Sim and Bootloader unlocking for late 2012, 2013 Xperias.

Anobiz · Jun 28, 2012 20 1 0

XperienceD said:
Just because they're not important to you doesn't mean they're not to others, and even if I could unlock I'd probably still be holding off in the hope that someone comes up with an S1Tool that allows Sim and Bootloader unlocking for late 2012, 2013 Xperias.

And is there anymore that knows where you can see what kind of things that does not work on CM for the Xperia Z.
I would like to have full funcionality like Radio, NFC, ...

Kind regards,

Hellscythe · May 23, 2013 at 2:24 AM

mate, unless someone finds an exploit, you CANNOT have non stock based roms on a locked bootloader.

Michealtbh · May 23, 2013 at 7:36 AM

Anobiz said:
And is there anymore that knows where you can see what kind of things that does not work on CM for the Xperia Z.
I would like to have full funcionality like Radio, NFC, ...

Kind regards,

There are only 2 bugs that I know of: the screen takes 1.5 seconds to wake up after pressing the power button, loudspeaker in calls doesn't work.

I've also heard that hdmi out is broken but I haven't tried.

I'm running Cyanogenmod personally and it's great.

Anobiz · Jun 28, 2012 20 1 0

Michealtbh said:
There are only 2 bugs that I know of: the screen takes 1.5 seconds to wake up after pressing the power button, loudspeaker in calls doesn't work.

I've also heard that hdmi out is broken but I haven't tried.

I'm running Cyanogenmod personally and it's great.

Thanks for this reply.
And it's not that I don't believe you, but is there a list that contains al the bugs?
Which version do you run? Stable, RC, Nightly?

Kind regards,

Michealtbh · May 23, 2013 at 8:59 AM

Anobiz said:
Thanks for this reply.
And it's not that I don't believe you, but is there a list that contains al the bugs?
Which version do you run? Stable, RC, Nightly?

Kind regards,

There is no official bug list afaik, just check the thread.

I usually run the latest nightly.

Anobiz · Jun 28, 2012 20 1 0

Michealtbh said:
There is no official bug list afaik, just check the thread.

I usually run the latest nightly.

I'm sorry but I don't think there is a thread.
I would like to install it from get.cm so where can I find the thread of the official CM 10.1?

Kind regards,

alexp999 · May 23, 2013 at 10:24 AM

Changelogs for all phones on get.cm can be found on BBQLog. Xperia Z is here:

http://changelog.bbqdroid.org/#/yuga/next

Use the links at the top to see changes in each version.

Michealtbh · May 23, 2013

Anobiz said:
I'm sorry but I don't think there is a thread.
I would like to install it from get.cm so where can I find the thread of the official CM 10.1?

Kind regards,

http://forum.xda-developers.com/showthread.php?t=2156919

There is also a discussion thread http://forum.xda-developers.com/showthread.php?t=2265153

You can find official nightly builds here
http://get.cm/?device=yuga

alexp999 said:
Changelogs for all phones on get.cm can be found on BBQLog. Xperia Z is here:

http://changelog.bbqdroid.org/#/yuga/next

Use the links at the top to see changes in each version.

I find this better than bbqlog http://mobile.10.1.cmxlog.com/?device=yuga

Anobiz · Jun 28, 2012 20 1 0

Hello,

Can you tell me what the difference is between the official Get.cm repo and the freeXperia project.
After that I can install my version of CM.

Thanks for clearing this out.

Kind regards

Michealtbh · May 23, 2013 at 1:13 PM

Anobiz said:
Hello,

Can you tell me what the difference is between the official Get.cm repo and the freeXperia project.
After that I can install my version of CM.

Thanks for clearing this out.

Kind regards

No real difference. FXP builds are released weekly while official builds are obviously released daily. The same code gets pushed to both builds afaik

[Q] [CM] Install CM without unlocking bootloader

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