Re: [Discuss-gnuradio] usrper fails in usb_claim_interface

[James Cooley]

I am now seeing something like this one crop up, very annoying.

Basically, I'm running in RX mode for a while. I stop running. I may 
unplug usrp, plug it in. Then:

====================
usrp: found usrp rev2
usrp_open_interface:usb_claim_interface: failed interface 2
could not claim interface 2: No such file or directory
usrp_basic_rx: can't open rx interface
Traceback (most recent call last):

<snip python traceback stuff>
====================

I've tried many things to try to work around it. Sometimes I've tried to 
reboot, but that doesn't *always* work. I should say, I'm running a few 
things off of USB... an external hard drive, the usrp, and a DB9 serial 
adapter thing.

Can it be solved in the same way, rmmod usbtest? Or is there something 
else at work?

-jamie







Matt Ettus wrote:

> Quoting Larry Doolittle <address@hidden>:
>
>  
>
> > On Tue, Apr 05, 2005 at 02:18:19PM -0700, Eric Blossom wrote:
> >    
> >
> > > On Tue, Apr 05, 2005 at 12:03:00PM -0700, Larry Doolittle wrote:
> > >      
> > >
> > > > I have an Avnet Virtex 4 evaluation board, intended for
> > > > projects similar in concept to GNU Radio.  It uses the
> > > > same CY7C68013 chip as USRP.
> > > >
> > > > I used USRP as a software reference design, and started
> > > > splicing in some code of my own. [chop]
> > > > 2005-04-05 11:20:16.264596500 <6>usbtest 5-1:1.0: FX2 device
> > > > 2005-04-05 11:20:16.264640500 <6>usbtest 5-1:1.0: high speed {control
> > > >        
> > bulk-in bulk-out} tests (+alt)
> >    
> >
> > > ----------------------------------^^^^^^^
> > >
> > > You have the usbtest module loaded.
> > > rmmod it.
> > >      
> > Eric is right, when I rmmod usbtest this problem goes away.
> > Someplace in the bowels of debian sid this module is configured
> > to reload every time I plug in the device, and I then have to
> > rmmod it again by hand.  "find /etc -type f | xargs grep usbtest"
> > didn't find the magic.
> >    
>
>
> Once you reprogram the EEPROM to something other than the default device,
> usbtest stops loading itself.
>
> Matt
>
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