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From: | mleech |
Subject: | Re: [Discuss-gnuradio] UHD Source -and- Sink In Same GRC Fl owgraph ? |
Date: | Tue, 21 Feb 2012 15:02:16 -0500 |
User-agent: | Roundcube Webmail/0.5.1 |
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 address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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