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Re: [Discuss-gnuradio] USBDEVFS_CONTROL failed

From: Rahul Dhar
Subject: Re: [Discuss-gnuradio] USBDEVFS_CONTROL failed
Date: Mon, 25 Apr 2005 03:53:53 -0400
User-agent: Mutt/1.5.9i

On Sun, Apr 24, 2005 at 01:17:26PM -0700, Eric Blossom wrote:
> On Fri, Apr 22, 2005 at 09:13:27PM -0400, Rahul Dhar wrote:
> > I frequently get messages of the variety
> > in demsg:
> >  usbdevfs: USBDEVFS_CONTROL failed dev 6 rqt 64 rq 8 len 1 ret -32
> > in console:
> >  usb_control_msg failed: error sending control message: Connection
> >  timed out
> > 
> > What causes this?  Normally unplugging the USRPs for a few seconds,
> > and reloading the ehci-hcd module takes care of it, but it's getting
> > annoying to have to do this every few minutes.
> > 
> I haven't ever seen this message.
> Are you seeing any messages from the gnuradio apps, or just in the
> kernel log?  

I see it when running the fsk_tx/rx apps and my own code.  In my code, I
start up both Tx and Rx daughtercards on two USRPs (both connected to
one machine)

> Is the usrp dev 6, or is it some other device?

Yes.  The only devices plugged in are USRPs.

> What kernel are you running?

vanilla 2.4.18.


Rahul Dhar
Actually, my goal is to have a sandwich named after me.

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