Get fatal IO error 11 when running usrp2_fft.py (USRP2 + XCVR2450)

Hi,

I installed the latest firmware : “Raw Ethernet with XCVR2450,
V3.3.1git”.
FPGA images is “u2_rev3-20100603.bin”. The OS is Fedora 13. And the
version
of gnu-radio is gnuradio-3.3.0.

When I run the command: #usrp2_fft.py -f 2.476G -g 45. The program can
work,
but I cannot click any choice box on the screen---- cannot choose the
box of
“Peak Hold” and others; cannot re-put the “center freq”. The thing likes
that the program is dead after it starts running. I only can force quit
it,
otherwise it cannot stop normally. And after I force quit, the following
information will be
shown.

[root@lion ~]# usrp2_fft.py -f 2.476G -g 45
python: Fatal IO error 11 (Resource temporarily unavailable) on X server
:0.0.

Is there anybody can help me? Thanks. And my former problem is still
here
that my USRP2 + XCVR2450 only received noise rather than signal.

Thanks again.

On 11/15/2010 09:08 PM, XIAN PAN wrote:

running. I only can force quit it, otherwise it cannot stop normally.
Thanks again.
Your “freezing” is very likely due to your machine not being up to the
task of doing FFTs of data at 6.25Msps. Try specifying “-d 40” on the
usrp2_fft.py command line and see if that improves the usability of
the user-interface.