Different Wiimote behaviour on connection attempt. 1+2 vs. SYNC

[myscha]

I use an Asus USB-BT400 on ubuntu 18.04.

I have the following setup to allow passthrough:

Code:

$ lsusb
Bus 003 Device 002: ID 0b05:17cb ASUSTek Computer, Inc. Broadcom BCM20702A0 Bluetooth

Code:

$ cat /etc/udev/rules.d/51-users-bluetooth.rules
SUBSYSTEM=="usb", ATTR{idVendor}=="0b05", ATTR{idProduct}=="17cb", TAG+="uaccess"
SUBSYSTEM=="usb", ATTRS{idVendor}=="0b05", ATTRS{idProduct}=="17cb", TAG+="uaccess"

Code:

$ cat .config/dolphin-emu/Dolphin.ini | tail -n 7
[USBPassthrough]
Devices = 0b05:17cb
[BluetoothPassthrough]
Enabled = True
VID = 2821
PID = 6091
DisableDescriptorCheck = True

It's always the same Wiimote and it doesn't depend on the order.

I get the following messages in the Dolphin log window:

Code:

20:13:531 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:657 N[Wiimote]: WiimoteReal::Initialize
20:13:531 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:476 N[Wiimote]: Wiimote scanning has started.
21:32:193 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/IONix.cpp:140 N[Wiimote]: Found Wiimote (B8:AE:6E:55:9C:74).
21:35:860 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:725 N[Wiimote]: Connected to Wiimote 1.
22:45:763 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/IONix.cpp:140 N[Wiimote]: Found Wiimote (7C:BB:8A:1B:70:CC).
22:46:159 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:725 N[Wiimote]: Connected to Wiimote 2.
23:06:662 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:802 N[Wiimote]: Disconnected Wiimote 2.
28:29:998 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/IONix.cpp:140 N[Wiimote]: Found Wiimote (7C:BB:8A:1B:70:CC).
28:30:351 /build/dolphin-emu-igPBcC/dolphin-emu-5.0+dfsg/Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp:725 N[Wiimote]: Connected to Wiimote 2.

Wiimote 1 was detected after pressing 1+2 and remains connected (21:xx:xxx).
Wiimote 2 was detected after pressing 1+2, but LED 2 doesn't light up (22:xx:xxx). It is disconnected again after about 20 seconds (23:xx:xxx).
Wiimote 2 was detected after pressing SYNC and remains connected (28:xx:xxx).