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

[Nowlan, Sean]

The plots are working now. I was on Qt 4.8.1 and Qwt 5.2.2, the defaults 
installed by the build-gnuradio script. I removed Qwt 5.2.2 (packages: 
libqwt5-qt4 libqwt5-qt4-dev) and installed Qwt 6.0.0 (packages: libqwt 
libqwt-dev). Perhaps it's worth changing these in the Ubuntu 13.* section of 
build-gnuradio.

--sean

________________________________________
From: address@hidden address@hidden on behalf of Tom Rondeau address@hidden
Sent: Tuesday, July 30, 2013 9:36 AM
To: Nowlan, Sean
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] QT GUI FFT and Waterfall plots not working for 
me on 3.7

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