Device is locked

[deep123]

Hi,

Somehow my device got locked and I am unable to flash images anymore.
below are the logs:

$ sudo fastboot flash aboot emmc_appsboot.mbn
target reported max download size of 268435456 bytes
sending 'aboot' (508 KB)...
OKAY [ 0.020s]
writing 'aboot'...
FAILED (remote: device is locked. Cannot flash images)
finished. total time: 0.024s

I tried to unlock it using fastboot oem unlock but the issue remains the same.
below are the logs:

$ sudo fastboot oem unlock
...
FAILED (remote: oem unlock is not allowed)
finished. total time: 0.003s

please show me the way to unlock the device.

Thanks.
deep123

[sujai]

Hi ,
Did you try to recover the device by flashing the SD Card image ?
Was the issue seen even with it ?

The latest SDcard image for Android is here:
https://www.96boards.org/products/ce/dragonboard410c/

And the procedure is here:
https://github.com/96boards/documentation/wiki/Dragonboard-410c-Installation-Guide-for-Linux-and-Android#install-android-or-ubuntu-from-an-sd-card

ps: The section "Step 4: Write the SD image onto an SD card" assumes you have a Linux machine and familiarity with DD command.
For Programming the SD card with the image (.img) file on Windows, you can use the Win32DiskImager tool
(http://sourceforge.net/projects/win32diskimager/)

thanks
Sujai.

[steve-taylor]

Please make sure you are using the most recent SD card image and flash the Android images again. This fastboot issue has been fixed in the most recent image.

[colorsky]

I was trying to get a bit familiar with fastboot commands.

I have tried to use oem lock command, this locked my 410C board.
$ sudo fastboot oem lock

Then I tried to unlock bootloader but failed.
$ sudo fastboot oem unlock
...
FAILED (remote: oem unlock is not allowed)
finished. total time: 0.003s

$ sudo fastboot oem device-info
...
(bootloader) Device tampered: false
(bootloader) Device unlocked: false
(bootloader) Charger screen enabled: false
(bootloader) Display panel:
OKAY [ 0.007s]
finished. total time: 0.007s

Since bootloader is locked, now I can not flash images to my board.
$ sudo fastboot boot boot.img
downloading 'boot.img'...
OKAY [ 0.768s]
booting...
FAILED (remote: unlock device to use this command)
finished. total time: 0.771s

I have tried to recover the device by re-flashing the SD Card image with no luck.

Can anyone help?

Thanks
colorsky

[vchong]

Hi colorsky,

Not 100% it will help but please try https://github.com/96boards/documentation/blob/master/ConsumerEdition/DragonBoard-410c/Installation/BoardRecovery.md.