Unable to turn on bluetooth on Mi A2

wilfridd

@nreal Theses steps to reproduce :
WIFI is on and BT is on = OK, can see devices. BT off then on again = OK, can see devices.
Set WIFI off = BT goes OFF itself few seconds after WIFI.

Set WIFI back on = BT stays off.
Restart is needed to get BT back on too.
If you can repoduce, I will file a bug.

Nreal

@nauvpp I have Xiaomi MI A2 and bluetooth does nothing, with or without wifi on / off.

danilo748

@nreal Infact! my BT is down again.
After every update it becomes active again but, for some reason, after i use it for some time it come off again.

wilfridd

@nreal Sorry I'm not sure to understand well. You mean BT is not working at all on your MiA2 ?

danilo748

When BT goes down (BT device list became empty and the icon disappeared), it seems like you can fix it with following steps.

Activate WIFI
Activate BT
Restart the device

Step 3 has to be quick before BT switches off again.
I've tried multiple times and it's ok for me.

Nreal

@nauvpp Yes BT doesn´t work at all.

wilfridd

@danilo748 I experienced exactly the same, except that BT on my A2 seems to be more stable

wilfridd

@nreal Can u try this in the terminal

Bluetoothctl [enter]
scan on [enter]

Then u should get this message:
No default controller available

I'm trying to get BT stops then starts again with command line but no success yet.

sudo service bluetooth restart

Does not gives any positive result neither

on MiA2 = nothing happens + unable to restart the phone, need hard power off.
It seems that a process is really stuck.
or PRO5 = "job has already been stopped" but BT is still on

Would be interesting to ask someone owning another halium 9 device.

Nreal

@nauvpp I think it is driver issue.

wilfridd

@nreal This will work for me :

Download firmware_jasmine_sprout_V11.0.28.0.zip
flash file "bluetooth.img" to slot a or slot b (depends of the setup)

This fixed completely BT issue on my MiA2.

Bogotrax

@nauvpp hello nauvpp, i followed your advice and used fastboot flash bluetooth_a bluetooth.img on my mi a2 , but it was not effective. I used the latest firmware from firmwareupdater site for xiaomi devices V11.0.28.0.QDIMIXIM . i extracted the bluetooth image and flashed it with the img. Can you confirm that these are the steps to take? Is there anything you did differently? Thanks in advance! Is there a way to read out the firmware version for bluetooth of my device somehow?

Bogotrax

@bogotrax

This is what i get as a result from the terminal when trying to get infos about bluetooth. Can you check if it has the same stats as yours?!
screenshot

Bogotrax

@bogotrax another output. I hope this helps even though i am not sure it is suppose to look like this. I expected a clearer firmware description.
alt text

wilfridd

@bogotrax,hi, try download https://github.com/ubports-xiaomi-sdm660/artifacts/releases/download/20211023/firmware_jasmine_sprout_V11.0.28.0.zip

Then extract and flash bluetooth.img

fredo333

I typed this: fastboot flash bluetooth bluetooth.img

It comes this:
target reported max download size of 536870912 bytes
sending 'bluetooth' (556 KB)...
OKAY [ 0.031s]
writing 'bluetooth'...
OKAY [ 0.010s]
finished. total time: 0.042s

But it did not work.
What I made wrong ?

fredo333

![text alternatif](

fredo333

@fredo333 Sorry, I could not modify my post

fredo333

Finally, I made a reset factory.
Miracle, all work !!!