Fingerprint

gpatel-fr

Is it not also true you shouldn't downgrade a A14 to A13 as the bootloader will lock?

Not sure I get your double negation assertion (always confusing), but it's not true, I got recently a FP5 with A14, I dutifully downgraded it to A13 and (after some mishandling by my self) have a running FP5 under 24.04. The Fairphone site even gives a procedure for that (linked to from the UT installer), so it's a totally acceptable practice.

sixwheeledbeast

@gpatel-fr Apologies if I wasn't clear.
It seems I recall incorrectly, have now found the correct information
You must not relock the bootloader if you downgrade Android version due to anti rollback protection.

gpatel-fr

@sixwheeledbeast said in Fingerprint:

You must not relock the bootloader if you downgrade Android version due to anti rollback protection

thanks for the clarification.
I take it that's the reason why there is (as far as I can tell) no option to lock the bootloader under UT ? That's one of the annoyance of UT for me, not only it's slow to start the phone every morning (I guess it's a Fairphone problem, I need to press the power button for a good 10 seconds before it deigns to display something), but it's necessary to press the power button again to confirm the boot

Vlad Nirky

@sixwheeledbeast
To use UT, you must never relock the bootloader

ozzy03

@gpatel-fr I have the issue too, I downgraded to android 13 and then installed UT, I get the same error as OP.

Tried rebooting a couple of times.

ozzy03

OP can you update the title to be more descriptive please, something along the lines of Fingerprint Sensor Fairphone 5 or similar.

It'll help others find the post.

gpatel-fr

@ozzy03 said in Fingerprint:

I downgraded to android 13 and then installed UT

thanks for the info
to make things absolutely clear, I asked specifically about the possibility of installing without downgrading to 13 - as current Fairphone 5 are (for now) produced with 14, so when you say you 'downgraded to 13', did you did that because

1)you followed dutifully the official procedure and never had a working fingerprint sensor (as I did), or

you did a 'naive' installation based on 14, had a working fingerprint sensor, and just tried to install again after downgrading the android base version and then have a not working fingerprint sensor ?

asking because I still have the idea to try to install again over 14, but I always have something else to try on my new toy :-). If 2) is the correct answer, I'd be more motivated to wipe everything and install again. I'm still curious to experiment myself if manufacturers like Fairphone being given the possibility to install different versions of Android while keeping the same Vndk still applies.

ozzy03

@gpatel-fr Hey, I wrongly assumed Android 13 was just because the docs were out of date! But after trying ubports installer and not working at all, I done some more searching and found out that you need to downgrade to 13.

After I downgraded ubports installer worked and that was the first time I had UT working.

I actually switched from stable channel to daily and after release 749 the fingerprint sensor started working

gpatel-fr

@ozzy03 said in Fingerprint:

after release 749 the fingerprint sensor started working

thanks, this will save me the time that I was considering taking for an experimental reinstallation with Android 14. However, this means that the version I am running, 24.04.1RC will probably not have a working fingerprint sensor when turning to stable, since it was released on 30 october and version 749 was built on 12 November.

Futura

Hopefully this will helps someone else here.

This has been my experience with 24.04-01

Stable: Fingerprint sensor broken
Daily: Audio Broken (did not test BT)
RC: Everything is working