On Thu, Apr 28, 2011 at 4:29 AM, Stefan Gofferje <[email protected]>wrote:
> Hi, > > now I finally got grc running and I am trying to get familiar with it > again. > > I ran into some funny stuff. > First, audio sinks don't work. Device or ressource busy. THAT is kinda > weird. > Of course, I have some stuff accessing the audio device but shared access > isn't an issue - normally. > Shared access when using ALSA is definitely an issue. Your other programs are likely using some audio layer on top of ALSA, like portaudio. GNU Radio will try to use ALSA straight away, which can cause sharing issues. This is a long standing problem, and we've never had anybody spend the necessary time to work out a proper solution. > enterprise:~ # fuser -v /dev/snd/pcm* > USER PID ACCESS COMMAND > /dev/snd/pcmC0D0p: sgofferj 4486 F...m knotify4 > sgofferj 4568 F...m amarok > root 8976 F...m sd_espeak > sgofferj 12180 F...m sd_espeak > > Audio out works neither as sgofferj nor as root. Audio in, however, works > fine. > > Second issue: > I started with doing very simple stuff to freshen up my understanding of > sources, sinks, etc. > One of the first things I did was taking an audio source (mic) and > straightly > feeding it into an FFT, Waterfall and Scope sink. FFT and Waterfall > segfault. > Scope works. > > Anybody any thoughts on that? > If some developers are reading here, advise me how to create backtraces and > I > will be happy to assist with debugging! > > -S I've never seen/heard of those guys segfaulting before. Can you provide the settings of the blocks you are using? I've used the FFT and Waterfall sinks directly connected to a USRP source (both UHD and the legacy interface) with no problems. Tom > > -- > (o_ Stefan Gofferje | SCLT, MCP, CCSA > //\ Reg'd Linux User #247167 | VCP #2263 > V_/_ Heckler & Koch - the original point and click interface > > _______________________________________________ > Discuss-gnuradio mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > >
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