Unable to turn on bluetooth on Mi A2

Sladek9 · 18 Oct 2021, 10:53

@c4pp4 Yes. I downloaded the vednor.img from the link in the ubports installer and then uploaded it manually. The only thing is that I downloaded the vendor.img in the latest version of ubports installer, but the intsallation itself was done in the older version - 0.88 I guess.
It was necessary due to the fact that the latest uboports installer did allow selecting the downloadad vendor.img in the file picker, but nothing happened then (button next did not respond). The version 0.88 worked fine. I had to use DEB package, because in SNAP package, the installer always crashed when trying to select the vendor.img in file picker.
I do not know if this procedure might bring any problems, but I do not think so, because it installed the latest version of UT successfully without any complaints.

c4pp4 · 18 Oct 2021, 11:57

@sladek9
try:

sudo stop bluebinder
rfkill list bluetooth
sudo start bluebinder
rfkill list bluetooth

here is output from my device:

Sladek9 · 18 Oct 2021, 14:11

@c4pp4 Still no hci0 unfortunately. Output is below:

phablet@ubuntu-phablet:~$ sudo stop bluebinder
[sudo] password for phablet:
bluebinder stop/waiting
phablet@ubuntu-phablet:~$ rfkill list bluetooth
0: bt_power: Bluetooth
Soft blocked: no
Hard blocked: no
phablet@ubuntu-phablet:~$ sudo start bluebinder
bluebinder start/running, process 10005
phablet@ubuntu-phablet:~$ rfkill list bluetooth
0: bt_power: Bluetooth
Soft blocked: no
Hard blocked: no
phablet@ubuntu-phablet:~$

It is strange, because it has worked until today in the morning.

c4pp4 · 18 Oct 2021, 15:29

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

Sladek9 · 19 Oct 2021, 07:32

@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 · 12 Nov 2021, 08:05

Up!

any news?
has anyone solved the problem?

Nreal · 13 Nov 2021, 08:20

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

wilfridd · 13 Nov 2021, 12:32

@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 · 13 Nov 2021, 14:02

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

wilfridd · 13 Nov 2021, 14:45

@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 · 13 Nov 2021, 16:43

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

Nreal · 13 Nov 2021, 21:55

@danilo748 I tried that too, didnt work here

wilfridd · 14 Nov 2021, 00:11

@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 · 14 Nov 2021, 09:32

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

danilo748 · 16 Nov 2021, 09:02

@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 · 16 Nov 2021, 21:47

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

danilo748 · 17 Nov 2021, 10:44

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 · 17 Nov 2021, 13:19

@nauvpp Yes BT doesn´t work at all.

wilfridd · 17 Nov 2021, 20:26

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

wilfridd · 17 Nov 2021, 20:42

@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.