Arch Linux

markus21

Member

Registered: 2015-08-28

Posts: 26

Can't find bluetooth devices / scan issues

I can't connect and/or find bluetooth devices anymore. It worked before and now it doesn't.
I'm sorry but I don't use bluetooth on a daily basis, so I don't know exactly when it stopped working.

Here is some input for you:

I already made sure, to install all the packages needed (regarding the wiki):

pacman -S pulseaudio-alsa pulseaudio-bluetooth bluez bluez-libs bluez-utils

I checked systemctl output

systemctl status bluetooth
● bluetooth.service - Bluetooth service
   Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2017-10-03 12:43:42 CEST; 5h 37min ago
     Docs: man:bluetoothd(8)
 Main PID: 366 (bluetoothd)
   Status: "Running"
    Tasks: 1 (limit: 4915)
   CGroup: /system.slice/bluetooth.service
           └─366 /usr/lib/bluetooth/bluetoothd

Okt 03 18:00:13 X1_Carbon bluetoothd[366]: Disconnecting failed: already disconnected
Okt 03 18:00:26 X1_Carbon bluetoothd[366]: Endpoint unregistered: sender=:1.34 path=/MediaEndpoint/A2DPSource
Okt 03 18:00:26 X1_Carbon bluetoothd[366]: Endpoint unregistered: sender=:1.34 path=/MediaEndpoint/A2DPSink
Okt 03 18:03:47 X1_Carbon bluetoothd[366]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSource
Okt 03 18:03:47 X1_Carbon bluetoothd[366]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSink
Okt 03 18:03:48 X1_Carbon bluetoothd[366]: Endpoint unregistered: sender=:1.34 path=/MediaEndpoint/A2DPSource
Okt 03 18:03:48 X1_Carbon bluetoothd[366]: Endpoint unregistered: sender=:1.34 path=/MediaEndpoint/A2DPSink
Okt 03 18:03:55 X1_Carbon bluetoothd[366]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSource
Okt 03 18:03:55 X1_Carbon bluetoothd[366]: Endpoint registered: sender=:1.34 path=/MediaEndpoint/A2DPSink
Okt 03 18:03:56 X1_Carbon bluetoothd[366]: Failed to set mode: Blocked through rfkill (0x12)

However rfkill says the bluetooth device is not blocked

sudo rfkill list all
0: tpacpi_bluetooth_sw: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
7: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no

This is what bluetoothctl outputs, while two active bluetooth devices around (Anker Sound Core Mini and BlackBerry Z10)

[NEW] Controller 00:28:F8:26:32:01 X1_Carbon [default]
Agent registered
[bluetooth]# power on
Changing power on succeeded
[bluetooth]# agent on
Agent is already registered
[bluetooth]# default-agent
Default agent request successful
[bluetooth]# scan on
Discovery started
[bluetooth]# scan on
Failed to start discovery: org.bluez.Error.InProgress
[bluetooth]# scan on
Failed to start discovery: org.bluez.Error.InProgress
[bluetooth]# scan on
Failed to start discovery: org.bluez.Error.InProgress
[bluetooth]# 

Kernel is 4.13.3-1-ARCH
Laptop is Lenovo ThinkPad X1 Carbon (G5)
Desktop is Plasma: And btw the bluetooth applet in plasma won't find no devices too.

Thanks for all your help! I can't find what I'm missing here.

PS: I also tried

rfkill unblock bluetooth

without any luck. There was no output after I issued the command, don't know whether there should be something mentioned....

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,435

Re: Can't find bluetooth devices / scan issues

Iwlwifi? Look here: https://bugs.archlinux.org/task/55796

markus21

Member

Registered: 2015-08-28

Posts: 26

Re: Can't find bluetooth devices / scan issues

Iwlwifi? Look here: https://bugs.archlinux.org/task/55796

The bug describes my issues.

I created iwlwifi.conf in the /etc/modprobe.d directory and put that line into it:

options iwlwifi bt_coex_active=0

As far as I understand this allows coexistant use of BT and Wifi. Does this make any downgrades regarding my wireless connections? Do I have to delete it, once there's a patch for this issue or should this line stay permanently?