Re: [Discuss-gnuradio] QT GUI FFT and Waterfall plots not working for me on 3.7

[Tom Rondeau]

On Mon, Jul 29, 2013 at 4:39 PM, Nowlan, Sean
<address@hidden> wrote:
> Hi all,
>
> For whatever reason QT FFT and Waterfall plots are not displaying for me.
> All the controls are present and I can change scale, FFT size, color
> intensity (for waterfall), etc. but the display area is just a white brick.
> Time domain display seems to work just fine.
>
> I see this behavior both with gr-qtgui/apps/uhd_display.py and with a simple
> GRC flowgraph with UHD -> QT sink.
>
> System info:
> Ubuntu 13.04 x86_64
> GNU Radio v3.7.0-82-g179a2d78
> UHD v3.5.3-20-gbcdf7c3
> Compiler: g++-4.6
>
> --sean

What version of Qt and QWT do you have? I've noticed display problems
on the time raster plots for Qwt less than version 6. So if you can
install and use Qwt 6 (which should be pretty easy on Ubuntu 13.04),
give that a shot.

Tom