Output screen not stable

GNU Radio
1

Hi,
I upgraded from ubuntu 12.04 to 12.10. Then installed gnuradio again
becoz after update it was not orking. When i upgraded i had issues with
the unity, then i corrected it. Then installed gnuradio. I ran the
gnuradio flow graph which i created for NBFM reciever. The output of the
FFT is not stable, the screen is vibrating. It was not vibrating in
12.04. I set the referesh rate to 15, still the issue is there. Any
solutions?

Best regards,
SAJJAD SAFDAR

2

On Wed, Apr 17, 2013 at 9:22 AM, Sajjad S.
[email protected] wrote:

Hi,
I upgraded from ubuntu 12.04 to 12.10. Then installed gnuradio again becoz
after update it was not orking. When i upgraded i had issues with the unity,
then i corrected it. Then installed gnuradio. I ran the gnuradio flow graph
which i created for NBFM reciever. The output of the FFT is not stable, the
screen is vibrating. It was not vibrating in 12.04. I set the referesh rate
to 15, still the issue is there. Any solutions?

Best regards,
SAJJAD SAFDAR

This actually sounds more like a problem with your video card driver
in Ubuntu. I’ve had different results with different video cards and
drivers using Unity specifically. So try to look into that.

In the meantime, you can try turning off OpenGL support by editing (or
creating) $HOME/.gnuradio/config.conf and adding:
[wxgui]
style=nongl

Tom

3

Hi Tom,

Thanks for that. Using nongl mode has brought my wxgui back to life as I
killed it after fumbling around with graphics drivers. For the record
here
is the error I was getting:

Xlib: extension “GLX” missing on display “:0.0”.

nongl mode also brings back a working persistence mode, yey! :slight_smile:

Mike

–
Mike J. M0MIK BSc MIET
Email: [email protected]
Web: http://scanoo.com