Just a followup to my own note. I did ldd /usr/lib/libgnuradio-qtgui-3.7.6.1.so.0.0.0
and no library comes up as missing. Thanks, Mike Markowski On 02/18/2015 04:13 PM, Mike Markowski wrote:
I was excited to successfully try an rtl-sdr GRC demo/tutorial and decided to start following the gnuradio tutorials to better learn the program. I quickly ran into trouble, so am sure I've done something stupid but can't figure out what! Running through tutorial http://gnuradio.org/redmine/projects/gnuradio/wiki/Guided_Tutorial_GRC and reaching section 2.2.3, 'Generate' goes fine, but not 'Execute': Generating: "/home/mm/gnuradio/tutorial_two_1.py" Executing: "/home/mm/gnuradio/tutorial_two_1.py" Traceback (most recent call last): File "/home/mm/gnuradio/tutorial_two_1.py", line 13, in <module> from gnuradio import qtgui File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/__init__.py", line 34, in <module> from qtgui_swig import * File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/qtgui_swig.py", line 28, in <module> _qtgui_swig = swig_import_helper() File "/usr/lib/python2.7/site-packages/gnuradio/qtgui/qtgui_swig.py", line 24, in swig_import_helper _mod = imp.load_module('_qtgui_swig', fp, pathname, description) ImportError: /usr/lib/libgnuradio-qtgui-3.7.6.1.so.0.0.0: undefined symbol: _ZN7QwtPlot11eventFilterEP7QObjectP6QEvent >>> Done (return code 1) The machine I'm on is a gentoo box with gnuradio compiled as follows (notice qt4 is specified): # emerge -pv gnuradio These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ] net-wireless/gnuradio-3.7.6.1:0/3.7.6.1::gentoo USE="alsa analog audio ctrlport digital doc examples fcd filter grc jack oss qt4 sdl utils wavelet wxwidgets -atsc -channels -dtv -fec -log -noaa -pager -performance-counters -portaudio {-test} -trellis -uhd -vocoder -zeromq" PYTHON_TARGETS="python2_7" 0 KiB Total: 1 package (1 reinstall), Size of downloads: 0 KiB As I mentioned, all works well with RTL-SDR source, so I assume there is a QT problem of some sort? Thanks! Mike Markowski
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