[BUG] "No paired devices found" with connected USB Bluetooth Dongle

[fam4r]

Describe the bug
Galaxy Buds Manager reports the message "No paired devices found" even if the Buds are connected successfully to a USB Bluetooth adapter. Note: the reported issue has been observed in a laptop with an internal Bluetooth adapter (also tried to disable it) and a connected USB Bluetooth adapter.

To Reproduce
Steps to reproduce the behavior:

1. Run the GalaxyBudsClient (./GalaxyBudsClient_Linux_64bit_Portable.bin)
2. Press "Continue"
3. Observe the problem

Expected behavior
The paired device is found.

Desktop (please complete the following information):

• OS: Arch Linux
• Application version: 4.2

Log files
application.log

2021-06-22 16:47:45.429 +02:00 [DBG] Linux.BluetoothService: Using Bluetooth adapter: hci1

[lightningjim]

I have a similar issue on my desktop. I have to use the USB because my motherboard's bluetooth isn't v5

Works fine in Windows, same issue in Linux/Pop! OS.

However I've not found a way to in OS side yet disable only the Bluetooth to test that part either.

Having the ability to change BT device might be useful here?

[StephenFluin]

Same issue I think.

I found a config.json, but it seems like there's no config or command line flag to select which bluetooth device is used. My headphones are connected to hci1, but the app only looks on hci0. :(

[lightningjim]

Confirmed this should fix it overall I am trying to figure out the best way to get https://unix.stackexchange.com/a/243135 to work for disabling the built-in USB But that managed to get the USB named as hci0, disabled the built-in from Linux (authorized = 0), paired my Galaxy Buds, and they showed up So the workaround works, and proves that the only issue here is that this attaches to hci0 only.

[timschneeb]

Yes, this is pretty much the issue. I'll try to add an option to change this without modifying your system configuration.

Currently, the Bluetooth backend on Linux chooses the first Bluetooth adapter returned by Bluez: https://github.com/ThePBone/GalaxyBudsClient/blob/efabd2527da1b0b503a040c6462e46b66365eb81/GalaxyBudsClient.Bluetooth.Linux/BluetoothService.cs#L89

[timschneeb]

Sorry, accidentally closed this :sweat_smile:

[timschneeb]

For now, the app searches for an environment variable called BT_ADAPTER.

Override the Bluetooth adapter like this:

export BT_ADAPTER="hci1"

You can grab updated binaries here: https://github.com/ThePBone/GalaxyBudsClient/actions/runs/1275520222