Re: [Libusbx-devel] libusbx: error [cache_config_descriptors] could not access configuration descriptor

[Qian P. <fl...@gm...>]

Sorry for late response.
We have tried the lastest libusb and tested, the problem still exists.
We found not only in the device enumeration phase will be stuck, sometimes
also occur in the bulk transfer phase 995 error code
Related log is as follows:
2014-09-24 14:17:05:[00000a28]
os/windows_usb.c:2067:windows_transfer_callback: handling I/O completion
with errcode 995, size 0
2014-09-24 14:17:05:[00000a28]
os/windows_usb.c:2090:windows_transfer_callback: detected operation aborted

Errcode 995 always haunts us, we couldn't find the real cause of the
problem.
Could you please give us some ideas or tips to find the cause of the
problem?

Thanks

2014-09-03 21:46 GMT+08:00 Pete Batard <pe...@ak...>:

> On 2014.09.03 09:35, Qian Peng wrote:
> > libusbx: error
>
> Looks like you are using libusbx, which has been superseded by libusb.
> Can you try with the latest libusb (Please visit http://libusb.info), in
> case it fixed that issue.
>
> > the issue looks like
> >
> http://sourceforge.net/p/libusbx/mailman/libusbx-devel/thread/1349577786.68914.1354005550176.JavaMail.open-xchange%40com4.strato.de/#msg30149384
> >
> > How do we avoid or solve the problem?
>
> As advised in the thread you point out, you may want to have a look at
> what USBView reports.
>
> Also, the device you are trying to access appears to be a "Kingston
> DataTraveler 2.0 Stick (2GB)" (http://www.linux-usb.org/usb.ids ->
> 0930:6544), which is a mass storage device.
>
> Can you clarify why you are trying to access a regular mass storage
> device using libusb on Windows? This means having to replace the default
> Mass Storage driver with WinUSB and losing native access to device as a
> flash drive, which seems like an odd thing to try to do...
>
> Regards,
>
> /Pete
>
>
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