[Discuss-gnuradio] Peak Hold in FFT display causing UI problems

[Marcus D. Leech]

I have an Atom D-510 running Fedora 12, and the latest UHD+GnuRadio (as
of this morning).

I've noticed that if I turn on "Peak Hold" in the FFT display, the
entire input side of the GUI becomes
  unresponsive to input, even for low input bandwidths, where the CPU
usage is quite low.

Anyone else seen this?

I can easily reproduce this with a simple:

UHD:Single-USRP source ------> FFT Sink (Update rate 5, Averaging on,
Peak Hold on)

It doesn't seem to depend on input bandwidth--even as low as 250KHz
input bandwidth, setting Peak Hold
  causes the GUI to become unresponsive (although the FFT display
continues to update).


-- 
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org