I was troubleshooting Bluetooth connection today and I thought that this is somehow related to software (PipeWire, bluez, bluetoothd and all that stuff). But no. Apparently Bluetooth barely works when WiFi antenna is disconnected from my ASUS motherboard.
Anyway, this might save a lot of time for someone, so I’m posting it here.
Has anyone else had an issue using a USB Bluetooth device, and if you turned off the motherboard Bluetooth, the USB didn’t work either? That happened to me when I was using it, at least. Now, I haven’t tried since then, so I could be wrong now.
There’s sometimes conflicts when both BT devices have the same supporting chipset. It’s why I don’t like integrated wifi on motherboards - I can’t upgrade the thing to a newer spec due to hardware conflicts that arise (blame Intel and their drivers)
On Linux I managed to disable the motherboard’s Bluetooth because it showed up as a usb device and then I’m able to use a dongle just fine.