Re: [Discuss-gnuradio] USB writing problem

[Harvind Samra]

I'll check out the /var/log/messages the next time it happens.

--- Harvind

On Mon, 2009-08-10 at 11:04 -0700, Eric Blossom wrote:
> On Mon, Aug 10, 2009 at 10:48:57AM -0700, Harvind Samra wrote:
> > We've occasionally encountered cases, while running OpenBTS, where the
> > USRP code hang up and starts spitting out the following message
> > repeatedly:
> > 
> > short write xfer: 0 != 3584
> > 
> > In looking at fusb_linux.cc, it looks like USB writes suddenly cease to
> > complete.  Sometimes, the host machine hangs so badly that a reboot is
> > needed.
> > 
> > I know USB on linux has always had problems.  So my questions are:
> > 
> > 1) Is this problem specific to the USRP or does it have to do with
> > libusb?
> > 2) Is the specific to certain USB controllers?
> > 3) Has this bug been addressed in recent updates/releases to gnuradio?
> > 
> > Any help is appreciated.  Thanks.
> > 
> > Harvind Samra
> > Kestrel Signal Processing, Inc.
> 
> Hi Harvind!
> 
> I've never seen this error.
> Have you checked the kernel logs? 
> /var/log/messages is probably a good place to start.
> 
> Eric