Arch Linux

DrDiemotma

Member

Registered: 2020-06-15

Posts: 2

Bluetooth connection errors

Hello, I'm new...

I recently got severe problems with my bluetooth devices. I've got three different dongles, the problem is persistent over all three of them. They seem to be registered well, in bluetoothctl:

[bluetooth]# list
Controller 21:19:86:00:72:3A cheetah [default]
[bluetooth]# show 21:19:86:00:72:3A
Controller 21:19:86:00:72:3A (public)
	Name: cheetah
	Alias: cheetah
	Class: 0x001c0104
	Powered: yes
	Discoverable: yes
	DiscoverableTimeout: 0x00000000
	Pairable: yes
        [...]
[bluetooth]# paired-devices
Device E4:17:D8:B6:62:7D 8Bitdo SN30 Pro
[bluetooth]# connect E4:17:D8:B6:62:7D
Attempting to connect to E4:17:D8:B6:62:7D
[CHG] Device E4:17:D8:B6:62:7D Connected: yes
Failed to connect: org.bluez.Error.Failed
[CHG] Device E4:17:D8:B6:62:7D Connected: no

systemd shows some info to that:

journalctl -b -u bluetooth.service
-- Logs begin at Sat 2019-12-14 14:54:28 CET, end at Mon 2020-06-15 15:29:12 C>
Jun 15 15:06:13 cheetah systemd[1]: Starting Bluetooth service...
Jun 15 15:06:13 cheetah bluetoothd[509]: Bluetooth daemon 5.54
Jun 15 15:06:13 cheetah systemd[1]: Started Bluetooth service.
Jun 15 15:06:13 cheetah bluetoothd[509]: Starting SDP server
Jun 15 15:06:13 cheetah bluetoothd[509]: Bluetooth management interface 1.16 i>
Jun 15 15:06:22 cheetah bluetoothd[509]: Endpoint registered: sender=:1.68 pat>
Jun 15 15:06:22 cheetah bluetoothd[509]: Endpoint registered: sender=:1.68 pat>
Jun 15 15:07:00 cheetah bluetoothd[509]: Can't get HIDP connection info
Jun 15 15:07:01 cheetah bluetoothd[509]: connect error: Invalid exchange (52)

The last two lines show up any time I try to connect to my gamepad (which is what the "8Bitdo SN30 Pro" above is, by the way), and it is not the same as when the power of the device is off:

[...]
Jun 15 15:28:22 cheetah bluetoothd[509]: Can't get HIDP connection info
Jun 15 15:28:27 cheetah bluetoothd[509]: connect error: Host is down (112)

Hence, there is some kind of connection, but it fails somehow.

Searching the web does not produce much information, there used to be a bug in Fedora a year ago, but I found no recent info of newer kernel bugs or any errors on my end. I tried different USB ports, a USB cable in between (maybe there are some interferences or so), the said three dongles, a different gamepad, ...

If someone has any ideas or infos, please let me now.

Thanks in advance!

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,792

Re: Bluetooth connection errors

Any chance there is another device in range that has already associated with the gamepad?

---

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

DrDiemotma

Member

Registered: 2020-06-15

Posts: 2

Re: Bluetooth connection errors

Thank you for the answer!

The gamepad is looking for devices itself, so no, that is not possible. Furthermore, this device was never paired with anything else than my PC.