When I try to connect a bluetooth DAC, which is shown as “Paired” and “Trusted”, it first gets connected, then immediately gets disconnected and the bluetooth adapter becomes turned off.
System
OS: Fedora 34 KDE
Kernel: x86_64 Linux 5.12.12-300.fc34.x86_64
Bluez version: 5.59
$ rfkill
ID TYPE DEVICE SOFT HARD
0 bluetooth hci0 unblocked unblocked
1 wlan phy0 unblocked unblocked
$ bluetoothctl show
Controller DC:FB:48:00:3B:3C (public)
Name: tuxedo
Alias: tuxedo
Class: 0x006c010c
Powered: yes
Discoverable: yes
DiscoverableTimeout: 0x00000014
Pairable: yes
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Handsfree Audio Gateway (0000111f-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: Generic Access Profile (00001800-0000-1000-8000-00805f9b34fb)
UUID: Audio Source (0000110a-0000-1000-8000-00805f9b34fb)
UUID: Generic Attribute Profile (00001801-0000-1000-8000-00805f9b34fb)
UUID: Device Information (0000180a-0000-1000-8000-00805f9b34fb)
Modalias: usb:v1D6Bp0246d053B
Discovering: no
Roles: central
Roles: peripheral
Advertising Features:
ActiveInstances: 0x00 (0)
SupportedInstances: 0x06 (6)
SupportedIncludes: tx-power
SupportedIncludes: appearance
SupportedIncludes: local-name
SupportedSecondaryChannels: 1M
SupportedSecondaryChannels: 2M
SupportedSecondaryChannels: Coded
$ bluetoothctl devices
Device 40:ED:98:19:8F:18 FiiO BTR3
$ bluetoothctl info 40:ED:98:19:8F:18
Device 40:ED:98:19:8F:18 (public)
Name: FiiO BTR3
Alias: FiiO BTR3
Class: 0x00240418
Icon: audio-card
Paired: yes
Trusted: yes
Blocked: no
Connected: no
LegacyPairing: no
UUID: Vendor specific (00000000-deca-fade-deca-deafdecacaff)
UUID: Serial Port (00001101-0000-1000-8000-00805f9b34fb)
UUID: Headset (00001108-0000-1000-8000-00805f9b34fb)
UUID: Audio Sink (0000110b-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
UUID: A/V Remote Control (0000110e-0000-1000-8000-00805f9b34fb)
UUID: Handsfree (0000111e-0000-1000-8000-00805f9b34fb)
UUID: PnP Information (00001200-0000-1000-8000-00805f9b34fb)
Modalias: bluetooth:v000ApFFFFdFFFF
$ bluetoothctl connect 40:ED:98:19:8F:18
Attempting to connect to 40:ED:98:19:8F:18
[CHG] Controller DC:FB:48:00:3B:3C Discoverable: no
[CHG] Device 40:ED:98:19:8F:18 Connected: yes
No agent is registered
[DEL] Controller DC:FB:48:00:3B:3C tuxedo [default]