Re: [Discuss-gnuradio] Re: USB2 problems with Fedora/USRP

[Johnathan Corgan]

On Thu, 2009-01-15 at 22:37 +0100, Alberto Trentadue wrote:

> It seems that I was wrong: USB2 driver seems to be working well, at least for 
> the first 
> configuration steps, because I am successful in configuring the Cypress FX2.
> Then it looks like the problem is actually 
> in the next step, that is, loading the fpga bitstream 
> /usr/local/hamradio/gnuradio/share/usrp/rev4/std_2rxhb_2tx.rbf

In my experience, a successful FX2 load followed by a failed FPGA load
is often due to poor USB physical integrity, such as a cable, connector,
or hub.  I know it sounds formulaic, but for whatever reason, I've
encountered this with the USRP on multiple occasions, where replacing
the cable with a different one, ensuring that has the 2.0 compliance
logo on it, fixes it.  YMMV, of course.

(Even more often it is due to not having a 2.0 controller, but you've
ruled that out already.)

-Johnathan