I cannot lock the booloader after having installed Lineage

Help Fairphone 4
1

I did install Lineage on my new FP4 following the instructions found here: Install LineageOS on FP4 | LineageOS Wiki
Installation is OK. But now, I cannot lock the bootloader.
I did try to follow this explanations:
https://support.fairphone.com/hc/en-us/articles/10492476238865-Manage-the-Bootloader
Unfortunately, when I enter :
fastboot flashing lock_critical
I get this message :
FAILED (remote : Device already : locked!)
But when I start the FP4 in fastbook mode, it is written in the screen DEVICE SATE - unlocked
Could someone help me?
Android version :14
Version Lineage OS : 21-20240724-NIGHTLY-FP4
Thanks!
Phil

1 Like
2

What is the outcome of:
fastboot flashing get_unlock_ability

If it is 0 you will brick your phone, if you lock the bootloader.

1 Like
3

Hi and thanks,
Outcome of
fastboot flashing get_unlock_ability
is 1

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4

LOS does not support to lock the bootloader.

3 Likes
5

You mean that the phone must be stayed unlocked ? Does this represent a danger? (e.g. In case you loose your phone?)

6

Yes when you want to stick to LOS it has to stay unlocked. Other CustomRom like Iode, Calyx or e/OS allow to lock the bootloader

Reg the risk, following my link you will find further info in the topic

7

OK. So do you recommand not to use LOS? Is /e/ a better choice?

8

I would use Iode or Calyx OS as I dont like the look of e/OS.

However at the end without knowing what your goal is by installing LOS a recommendation is difficult.

So maybe do some reading in the forum there are many topics discussion pros/cons

9

OK, thank you very much. I will do some readings as you suggest. Again thank you for your kind support. I do appreciate.
Phil.

10

you have two state of locked/unlocked, that explain the apparent contradiction here.

  • fastboot flashing unlock / fastboot flashing lock (1)
  • fastboot flashing unlock_critical / fastboot flashing lock_critical (2)

I my interpretation your critical partitions were already locked (2) but not your device state (1) :slight_smile:

As already said by others:

  • only a few custom OS support relocking, for the others you have to stay unlocked.
  • be extra careful to the get_unlock_ability otherwise you brick your device…
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