Emulator

No, it's exactly the same with WinUSB

It's an issue on your end then; as I cannot reproduce. usbdk/winusb seem volatile at best with various adapters... I really don't know how to debug this any further. LibUSB error in teh logs is out of our scope.

After rebooting with WinUSB driver on BCM2045A -- Dolphin crashes on game boot. What Log Types should I check and provide?

Well, the issue is that Dolphin isn't getting control of the USB device, which is bad. When in passthrough mode, Dolphin pretty much HAS to get it, or else things go poorly.

For some reason, something else else (whether another program or a bug, I don't know,) is making it so we cannot get control of the bluetooth adapter.

None of these issues exist on Linux, and my Windows PC isn't running into it. The logs you gave say what's going on, but, I don't know how to fix it outside of just messing around with it until it works.

Can you suggest in which way should I mess on? Maybe I'll stumble on my setup's problem

With LibUSB, I tend to try different USB ports, unplugging various USB devices, if you have other USB bluetooth adapters, you can try those, etc.

You want to make sure Windows isn't trying to use the adapter (if it shows up in the taskbar, that means it can access it and that usually means bad things can happen.)

You can always try resetting the drivers and installing again... this entire thing is finicky to the max.

I do want to make it work properly, so I'll fiddle with it throughout. Thank you!

If you can, try older builds with passthrough too, just to make sure we didn't muddle up anything in particular setups too.

Wow! It works with WinUSB in versions from 5.0-2204 to 5.0-2341 including (didn't go deeper)
Stops working (crash) on 5.0-2352 (https://dolphin-emu.org/download/dev/d244597b4250214a4bd529db649a4042cdbfa249/)

Actually, works with usbdk too. But now it crashes with every version newer than 5.0-2341.

Wasn't doing this before with libusbK before

usbdk isn't supported in the older builds. If you uninstall the usbdk drivers, it should fallback to the old behavior.

But it's working with older builds, not working with newer starting on 5.0-2352

Damn, I meant usbK

usbdk doen't want to install on my system

So what happened in 5.0-2352 that broke my ability to play games with launchers?

 17:45:486 HW\WiimoteReal\WiimoteReal.cpp:559 N[Wiimote]: Wiimote scanning thread has started.
 17:45:486 HW\WiimoteReal\WiimoteReal.cpp:727 N[Wiimote]: WiimoteReal::Initialize
 17:54:023 HW\WII_IPC.cpp:140 I[WII_IPC]: Resetting ...
 17:54:141 IOS\USB\Bluetooth\BTReal.cpp:101 E[IOS_WIIMOTE]: Failed to get config descriptor for device 1b21:1242: LIBUSB_ERROR_NOT_FOUND
 17:54:141 IOS\USB\Bluetooth\BTReal.cpp:101 E[IOS_WIIMOTE]: Failed to get config descriptor for device 8086:a12f: LIBUSB_ERROR_NOT_FOUND
 17:54:142 IOS\USB\Bluetooth\BTReal.cpp:118 N[IOS_WIIMOTE]: Using device 057e:0305 (rev 100) for Bluetooth: Broadcom Corp BCM2045A 
 18:01:649 HW\WII_IPC.cpp:140 I[WII_IPC]: Resetting ...
 18:02:743 HW\WII_IPC.cpp:140 I[WII_IPC]: Resetting ...
 18:02:850 IOS\USB\Bluetooth\BTReal.cpp:101 E[IOS_WIIMOTE]: Failed to get config descriptor for device 1b21:1242: LIBUSB_ERROR_NOT_FOUND
 18:02:850 IOS\USB\Bluetooth\BTReal.cpp:101 E[IOS_WIIMOTE]: Failed to get config descriptor for device 8086:a12f: LIBUSB_ERROR_NOT_FOUND
 18:02:851 IOS\USB\Bluetooth\BTReal.cpp:118 N[IOS_WIIMOTE]: Using device 057e:0305 (rev 100) for Bluetooth: Broadcom Corp BCM2045A 

Now it does this and gets stuck on black screen after trying to launch game from launcher. On winusb and usbk the same

I'm having the exact same problem with the Wii bluetooth module. I guess I'll just use 2341...

If someone wants more logs I'll be happy to help. I can also give debug logs.

There is a related issue on the usbdk github page here: https://github.com/daynix/UsbDk/issues/35