[Discuss-gnuradio] QT GUI Flicker.

[Kai Garrels]

Hi,

this will help:

http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2018-October/058243.html

The primary point of issue that I know of is that the default PyQt4 Qt4 rendering configuration is "raster", which for some reason results in the GUI window flashing a lot & sometimes being unresponsive. The solution is to create or edit the file `~/.gnuradio/config.conf` and add (or tweak) the following:
{{{
[qtgui]
style = native
}}}
or use `opengl` if that works. The default is "raster", which is the fastest and, generally, the most compatible, but for some reason this setting is borked on macOS Mojave 10.14. For me, "native" works but "opengl" doesn't. No idea why & it's not worth my time tracking down the issue since we're moving to Qt5 in the 3.8 release -- and thus away from Qt4 except for legacy support -- and Qt5 should provide between rendering compatibility for OSX (both newer and older).

Best regards,

kai

Message: 1
Date: Mon, 11 Feb 2019 12:16:10 +0800
From: Ren Lie <address@hidden>
To: address@hidden
Subject: [Discuss-gnuradio] QT GUI Flicker
Message-ID: <address@hidden>
Content-Type: text/plain; charset="us-ascii"

Hi, I get some trouble with QT GUI Flicker.

Did anyone know how to fix it?

I installed gnuradio from the MacPorts and run it in MacOS Mojave 10.14.2 .

This version is gnuradio @3.7.13.4_3 +docs+grc+jack+log4cpp+logging+portaudio+qtgui+sdl+swig+uhd+wavelet+wxgui+zeromq

QT GUI Flicker : https://imgur.com/a/Ilomw47 <https://imgur.com/a/Ilomw47>

Btw, the fuzzy text makes me annoying.

Regards,

Ren Lie