[Discuss-gnuradio] USB2 problems with Fedora/USRP

[Alberto Trentadue]

Hello

I've finally assembled the USRP few days ago, after being delayed some months.

The power-on behaviour looks as expected: one led blinks at 3 Hz or so.
The next step is to try out some example, e.g. usrp_benchmark_usb.py or 
usrp_wfm_rcv.py.
Whatever the test I try, I can see that blinking led is switched of for a 
couple seconds, then it blinks at lower 
rate, and another led near to it turns on  (don't remember which is D402 and 
D403).

On console, i get this kind of error:

usb_control_msg failed: error sending control message: Connection timed out
usrp: failed to load fpga bitstream 
/opt/gnuradio/share/usrp/rev4/std_2rxhb_2tx.rbf
Traceback (most recent call last):
    File "./usrp_benchmark_usb.py", line 106, in ?
        main ( )
    File "./usrp_benchmark_usb.py", line 96, in main
        ok=run_test (rate, verbose)
    File "./usrp_benchmark_usb.py", line 63, in run_test
        usrp_tx=usrp.sink_s(0, tx_interp)
    File 
"/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp.py", 
line 230, in __init__
        fpga_filename, firmware_filename)
    File 
"/usr/local/hamradio/gnuradio/lib/python2.5/site-packages/gnuradio/usrp1.py", 
line 940, in  sink_s
        return _usrp1.sink_s(*args)
RuntimeError: can't open usrp1

I'm using the latest svn checked-out source code.

I'm almost convinced that the problem is in the USB2 driver used by gnuradio to 
control the USRP (ehci-hcd?).
I have 2 questions:
1. What do you suggest to use to investigate and troubleshoot such USB2 problem 
on Fedora 9?
2. What does the second led turning on mean?

t.i.a. for help.
Alberto


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