Unable to turn on bluetooth on Mi A2

c4pp4

@sladek9 Have you restarted your device in the morning or what?
BTW: I have the same output of 'dmesg | grep -i blue'

Sladek9

@c4pp4 If I restart, then the hci0 goes on. But when I go to the settings to search for any device to connect, the hci0 goes out. So it seems going to the settings is breaking it.

danilo748

Up!

any news?
has anyone solved the problem?

Nreal

@danilo748
It doesnt work here either.
Mobile network is having issues too.
Cannot use my nextcloud..

wilfridd

@danilo748 hi! Seems that BT and Wifi are linked together.
I've recently noticed that BT if not working anymore if you switch off WIFI. Switching back on Wfi + A device restart is needed to have BT working again, or maybe at least a netword service restart with command line.

Nreal

@nauvpp Ti doesnt seem to make any difference if wifi is on or of here.

wilfridd

@nreal here's what "rfkill list" shows on my device
0: bt_power: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: hci0: Bluetooth
Soft blocked: no
Hard blocked: no

danilo748

I change the channel from stable to devel and now th BT works!

Nreal

@danilo748 I tried that too, didnt work here

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?