On 2012.11.21 18:41, Bas van Dijk wrote:
> libusbx: warning [hid_open] could not open HID device in R/W mode
> (keyboard or mouse?) - trying without

If libusbx gives you a warning, you're supposed to pay some attention to 
it... :)

 >            VID:PID: 0627:0001

Let's see 0627 = Adomax Technologies [1], maker of mice and keyboards 
(though the strings say "QEMU USB Tablet" so I'm not sure who to 
believe), which naturally brings us to [3]:

"HID keyboards and mice cannot be accessed using the native HID driver 
as Windows reserves exclusive access to them."

In other words, if you're trying to access an HID mouse or keyboard 
under Windows, virtualized or not, you're gonna have a bad time.
And yes, the same device will be accessed fine under other OSes as this 
is a Windows limitation.

I don't think there's much we can do here. Now, if you have the same 
issue with an HID device that doesn't act as a mouse or keyboard, and 
therefore that Windows will not try to keep exclusive access to, that's 
a different story...

Regards,

/Pete


[1] http://www.linux-usb.org/usb.ids
[2] http://www.adomax.com/index.asp
[3] 
https://github.com/libusbx/libusbx/wiki/Windows-Backend#wiki-Known_Restrictions

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