Mi A2 : installing UT over Android One - the bootloader issue

wilfridd

@mrt10001 Thanks for your reply!
Yes, I have found the OEM unlock. BTW, the miflash tool shows the bootloader status
(bootloader) Verity mode: true
(bootloader) Device unlocked: true
(bootloader) Device critical unlocked: false
--> this one may cause the issue? not sure...
(bootloader) Charger screen enabled: false

You mean that you had to leave your bootloder unlocked on your phone?

Keneda

@nauvpp said in Mi A2 : installing UT over Android One - the bootloader issue:

I restarted to fastboot mode to lock the bootloader again : fastboot oem lock.

Sorry i don't have your phone but that was a bad move.
Try to unlock again.

Ubports obviously don't have any key from xiaomi or google to "verify" the boot process of uTouch.

wilfridd

@keneda Thank you.
I unlock it again...that is the only way to boot UT but the warning message at boot is not really nice.

I agree with you regarding the "key".
I own a Meizu MX4/Pro5 and Nexus5, they must have their custom bootloader so it trusts UT.
I will search XDA for a possible solution...

Lakotaubp

@nauvpp That boot message appears on a number of devices OP3 and OP5 that I have for instaance. Please just ignore it, your bootloader needs to be unlocked for UT to work.

nero355

Also :

NEVER LOCK the Bootloader after UNLOCKING it on any phone!

It will leave you with a BRICK!

And in most cases it means contacting shady people via shady ways to get your phone working again by letting someone access it via the EDL Mode which is hidden on many phones these days!

wilfridd

@nero355 Hi, I wouldn't be so categorical about bootloader locking : On the N5 hammerhead, I've locked the bootloader again and... it boots OK so does the update (devel channel). Interesting fact : fastboot screen says:

Prd name - hammerhead
HW version - rev.11
bootloader version - HHZ12h
...
secure boot - enabled
lock stat - locked
Again, I'm not an expert, but it seems to me that N5 benefits a dedicated/custom bootloader/recovery mode that trusts UT and let it boot happily :grinning_face_with_big_eyes:
BTW the UBports Recovery is awesome ! Hats off to Devs!

AppLee

@nauvpp
The N5 is not a Halium port.
This is a custom image initiated by canonical so maybe they put the time and effort into this possibility.
Most UT compatible devices are Halium based and won't work with a locked bootloader.

jonlockwood17

It seems to be the nature of the beast. the annoying boot loader screen isn't a huge deal, but it does beg the question, how secure is the OS? Does this mean google has a back door?

Lakotaubp

@jonlockwood17 Have a read of this thread https://forums.ubports.com/topic/6941/getting-rid-of-the-warning-at-boot as to why.

nero355

@jonlockwood17 said in Mi A2 : installing UT over Android One - the bootloader issue:

It seems to be the nature of the beast. the annoying boot loader screen isn't a huge deal, but it does beg the question, how secure is the OS? Does this mean google has a back door?

I wouldn't worry a lot about that : Google and Microsoft forced a lot of their Secure Boot crap on us which 99,99% of us totally do not need!