Bluetooth headset not working

Robotics & Edge Computing Jetson Systems Jetson AGX Xavier
1

Bluetooth headset not working

I have a Jetson Xavier AGX development kit with a Bluetooth module. I want to connect a Bluetooth headset to the AGX. I can pair the headset to the AGX, but then it disconnects immediately. I run “btmon” to watch the connection, and I notice this error message:

> ACL Data RX: Handle 1 flags 0x02 dlen 12
L2CAP: Connection Request (0x02) ident 34 len 4
PSM: 25 (0x0019)
Source CID: 66
< ACL Data TX: Handle 1 flags 0x00 dlen 16
L2CAP: Connection Response (0x03) ident 34 len 8
Destination CID: 0
Source CID: 66
Result: Connection refused - PSM not supported (0x0002)
Status: No further information available (0x0000)

I’m using Jetpack 4.3 (which I think is based on Ubuntu 18)

$ uname -a
Linux 4.9.253-tegra #1 SMP PREEMPT Mon Jul 26 12:19:28 PDT 2021 aarch64 aarch64 aarch64 GNU/Linux

How can I fix this?

3

Hi,
Please apply this setup and give it a try:

Enabling Bluetooth Audio — NVIDIA Jetson Linux Developer Guide 1 documentation

4

Thanks for the information. I have followed those instructions, but it hasn’t helped. I verified that bluetoothd is starting with the correct parameters:

# ps -ef | grep bluetoothd
root   6206  1  0 11:08 ?  00:00:00 /usr/lib/bluetooth/bluetoothd -d

I still get the same error though.

5

Hi,
Could you try latest Jetpack version 4.6.5 or 5.1.3? Check if it works on latest release.

6

Interesting result. Using Jetpack 5.1.3, bluetooth audio works correctly. So there is something missing from Jetpack 4.3 which prevents it from supporting bluetooth audio. I guess that means we will need to port our firmware to a later version of Jetpack.

Thanks for the help. At least now we know what we need to do next.