[libhid-discuss] hid_force_open() error

[Mark S. Townsley]

After applying the patch as you indicated, I am getting back this error
(with hid_force_open):

  WARNING: hid_prepare_hid_descriptor(): failed to get HID descriptor for
USB device 002/002[0]: error sending control message: Connection timed out.


Do you have a suggestion to work around this?


On 9/27/06, Charles Lepple <clepple at ghz.cc> wrote:
>
> On Sep 26, 2006, at 8:01 PM, Peter Stuge wrote:
>
> > On Tue, Sep 26, 2006 at 03:01:51PM -0700, Mark S. Townsley wrote:
> >> hid_force_open failed with return code 13
> >>
> >> I am new.  Can someone explain what this means?
> >
> > $ perror 13
> > OS error code  13:  Permission denied
> >
> > I'm not sure that this is your problem, but it's worth looking into -
> > how are your permissions set up?
>
> Actually, this is coincidence - HID_RET_NOT_HID_DEVICE is also return
> code 13 (I know, it's hidden in an 'enum'... I thought we had an
> equivalent to usb_strerror(), but I guess not.)
>
> Mark, can you try applying the following patch, and see if the error
> message gets any better?
>
> You can also try bumping up USB_TIMEOUT in include/constants.h, but I
> believe it is set to 10 seconds now (which should be plenty of time,
> even for a low-speed device).
>
> Index: src/hid_preparation.c
> ===================================================================
> --- src/hid_preparation.c   (revision 300)
> +++ src/hid_preparation.c   (working copy)
> @@ -34,7 +34,7 @@
>         USB_TIMEOUT);
>     if (len < 0) {
> -    WARNING("failed to get HID descriptor for USB device %s", hidif-
> >id);
> +    WARNING("failed to get HID descriptor for USB device %s:%s",
> hidif->id, usb_strerror());
>       return HID_RET_NOT_HID_DEVICE;
>     }
>
>
> --
> Charles Lepple
> clepple at ghz.cc
>
>
>
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>
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