Re: [Discuss-gnuradio] carrier signal dropping

[Eric Blossom]

On Wed, Jan 06, 2010 at 04:32:21PM -0500, Charles Irick wrote:
> My apologies,
> Distro: Ubuntu 9.04
> Kernel: 2.6.28-17-generic
> GNU Radio version: I'm pretty sure it's 3.2.2, I'm using the dev trunk
> but svn doesn't seem to allow me to update right now.
> 
> It is indeed complaining about not being able to enable real-time
> scheduling. Since you asked I assumed this was the issue and looked it
> up. It turns out even though I set up the USRP2 to run as non-root by
> changing the permissions of usrp2_socket_opener, this was the issue.
> It seems to work fine as root. I'm guess the tx fifo was emptying
> without scheduling? Is there anywhere that I can read up on this
> real-time scheduling because I will definitely need to solve some
> similar issues in the future.
> 
> 


Edit /etc/security/limits.conf and add this line:

@usrp  - rtprio 50

make sure that your user is a member of group usrp, then logout and back in.

Eric