Re: [Discuss-gnuradio] [USRP-users] Gnu Radio apps freezes (locks up)

[Tom Rondeau]

On Wed, Mar 28, 2012 at 10:02 AM, Rickard Radio <address@hidden> wrote:
> Hi list,
>
> After I upgraded to latest Gnu Radio 3.5.2, and latest UHD (and images), GR 
> applications just freeze when running. No warnings, error messages or 
> overflows etc. Just freeze.
> A simple FFT plot directly on received samples from the USRPN210 just freezes 
> after some seconds, or minutes (depending on the sample rate), although the 
> load on the machine is not high. Need to kill GR-app and restart it, with the 
> same problem occurring again.
>
> This has never been a problem with earlier versions of GR/UHD, from about 6 
> months ago.
> The freezing happens quicker with high sample rate setting but also with 
> lower, eventually. No overflows happen (which was possible to get before with 
> too high sample rates or load, etc.)
>
> The USRPN210 stops sending samples to the computer at the same moment as 
> GnuRadio freezes (as observed on the system monitor).
>
> Same thing happen on two identical laptops running Ubuntu 10.10 (also 
> upgraded it from 10.04). Not sure if its a strict GnuRadio problem (since it 
> worked before), UHD, or some problem with the Ubuntu Linux 10.10. It work(ed) 
> flawlessly with another machine on OSX (before I tried to upgrade GR on it 
> but then got stuck...) with identical UHD version and images.
>
> Installation of UHD+GnuRadio with the automatic linux script runs without any 
> problems, as before, no errors or warnings.
>
> Any de-freezing help or clues appreciated!
>
> Rickard

Rickard,

Just to be clear. When you install 3.5.2 from the tarball, it freezes.
When you use the build-gnuradio, everything works fine?

What's your machine?

Tom