[Libusbx-devel] [libusbx] Windows: Windows 8: Incorrect USB 3.0 speed detection (#155)

[Stephen Ong]

I have a USB 3.0 (bladeRF) device that is correctly recognized as SuperSpeed device in Windows 7 using Renesas stack.

That same device is incorrectly detected as HiSpeed device in Windows 8.1 using Microsoft stack.

The problem seems due to Windows 8.1 API. Please see: http://social.msdn.microsoft.com/Forums/en-US/7d99b451-3bfd-4e0f-959f-f9cb7b75e9a0/ioctlusbgetnodeconnectioninformationex-bus-speed-issue-under-windows-8


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[mcuee]

In that case, this can not be fixed. Maybe a document fix is good to have.

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[Stephen Ong]

Can IOCTL_USB_GET_NODE_CONNECTION_INFORMATION_EX_V2 be used for speed detection when the operating system is detected as Windows 8?

https://github.com/libusbx/libusbx/blob/master/libusb/os/windows_usb.c#L1137

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[Pete Batard]

It probably can. __Someone__ just needs to provide a patch (which probably isn't going to be me for the foreseeable future).

In parallel to EX2, the Windows version detection code from [here](https://github.com/libusbx/libusbx/blob/master/libusb/os/windows_usb.c#L826) will also need to be updated with something more up to date, such as [this](https://github.com/pbatard/libwdi/blob/master/libwdi/libwdi.c#L222).

/Pete

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[Pete Batard]

This has now been fixed in libusb in https://github.com/libusb/libusb/commit/d41802053c4f20691f38072879c9dd76806f0f91.

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[Pete Batard]

Closed #155.

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