Re: [Libusb-win32-devel] Disconnect detection in libusb

[Dan E. <Dan...@ne...>]

kosel wrote:
> Hello,
>=20
>> From: IC-...@t-... (kosel)
>>=20
>>> From: "Dan Ellis" <Dan...@ne...> The problems you
>>> are describing sound very much like ones I encountered when keeping
>>> a handle open to the device and putting a laptop into standby (and
>>> got fixed).
>>=20
>> it seems to be connected with your solved problem.
>>=20
>> I commented out the
>> usb_close(udev);
>> which was executed after usb_bulk_read failed and before the loop to
>> research for the device is reentered.
>=20
> ups,
> I forgot to wrote, that commenting out the call of usb_close _seems_
> to solve the problem for S1 suspend.=20
> After resume from S1 everything seem to work fine.
>=20
> But after resume from S3 suspend, there is still no wake up for the
> USB. (Not only my libusb device.)=20

I think you may need a kernel debugger to get much further. Try
debugview from sysinternals (free).

You can update the driver (with any additional debug you put in) by just
putting the new build into WINDOWS\system32\drivers and replugging your
device.

Dan.