Re: [Discuss-gnuradio] segfault and gr-fcd

[Volker Schroer]

Downgrading to libusb-1.0.8 solved the problem. I only see some messages 
like

libusb:error [libusb_cancel_transfer] cancel transfer failed error -5
libusb:error [libusb_cancel_transfer] cancel transfer failed error -5
libusb:error [libusb_cancel_transfer] cancel transfer failed error -5
aUaUaUaUaUaUaUaUlibusb:error [libusb_cancel_transfer] cancel transfer 
failed error -5
aUaUaUaUlibusb:error [libusb_cancel_transfer] cancel transfer failed 
error -5
libusb:error [libusb_cancel_transfer] cancel transfer failed error -5
libusb:error [libusb_cancel_transfer] cancel transfer failed error -5
libusb:error [libusb_cancel_transfer] cancel transfer failed error -5

But no segfault anymore.

Am 07.04.2012 17:38, schrieb Volker Schroer:
> Hi Alex,
> thank you for the quick response.
>
> > Hi Volker,
> >
> > Although using a slider to tune hardware pll is a bad idea, I don't
> > think the crash you see is because of that. It sounds more like an
> > issue some people have seen on debian with libusb 1.0.9-pre-something
> >
> > Which version of libusb do you have? Can you run the included examples
> > and qthid without crash?
> I'm using libusb-1.0.9_rc3. I get a similar problem using qthid. qthid 
> crashes before showing up the gui.
> I think, libusb has a problem multiple open and closing the device. So 
> I just changed the code of qthid to open the device only at the 
> beginning and keep it open. Then qthid works.
> > PS: The slider in your example isn't doing much as it has only one 
> > step ;-)
> I know, but it was the easiest way to show the problem.
>
> Perhaps I should downgrade libusb.
>
> Volker
>
>
>
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