I'm willing to bet that your segfault comes from our friend OpenGL:
Try this before you start your application: export "LIBGL_ALWAYS_INDIRECT=1" Also try updating to latest master for Gnu Radio and UHD. If you're on Ubuntu or Fedora, you can use: http://www.sbrac.org/files/build-gnuradio To do the download/build/install/post-install dance -Marcus On Tue, 21 Feb 2012 19:55:45 +0000, Iain Young, G7III wrote: > Hi Folks, > > I'm having some fun and games with gnuradio, a USRP1, and trying to > transmit and receive at the same time, using gnuradio-companion. > > A Simple [UHD SOURCE] ----> [UHD SINK] works perfectly, but when I > start to try to do other things, I get a Segmentation Fault from > somewhere. > > Even something as simple as this graph SEGVs on me (Yes, I know it's > useless, but I cut everything down to as simple as I could to confirm > the problem wasn't in my flowgraph, and those blocks were already in > my wonderfully crafted flowgraph!): > > [SIGNAL SOURCE 1750Hz] -> [UHD SINK] > [UHD SOURCE] -> [MULTIPLY CONST] -> [WX_WATERFALL] > > It does not seem to matter what antennas or sub devices I > select (I have twin WBX boards, so am able to switch which > antennas do what..) > > My gnuradio installation is from git, just a few weeks ago, > gnuradio-config-info -v shows v3.5.1-43-g309ca769 > > UHD is from the same date (3rd Feb looking at my datestamps), > and uhd_find_devices reports: > > linux; GNU C++ version 4.6.1; Boost_104601; UHD_003.004.000-5b06adb > > for it's version, and does find my URSP as expected with it's > dual WBX's. USRP Firmware is from 29-11-2011 (latest I found), Base > system is Ubuntu 12.04. > > Anyone have any pointers ? Is this a known issue ? Would upgrading > to the very latest HEAD help me ? Or is there something I need to > do in code prior to running both a UHD SOURCE and SINK in the same > flowgraph under grc ? > > Best Regards > > Iain > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org [1] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio [2] Links: ------ [1] mailto:Discuss-gnuradio@gnu.org [2] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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