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Re: [Discuss-gnuradio] USB writing problem
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] USB writing problem |
Date: |
Mon, 10 Aug 2009 11:04:40 -0700 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
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