Hi Tim, 2013/4/21 Tim E. Real <[email protected]>: > On April 14, 2013 02:53:16 PM Robert Jonsson wrote: >> Hi guys, >> >> I've been meaning to send this and/or debug it but it keeps elluding me. >> >> Sometimes when I start MusE without jack running I get the following crash. >> Config File </home/ddskrjo/.config/MusE/MusE.cfg> >> LOCALE en_US >> Denormal protection enabled. >> jackd 0.122.0 >> Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben >> Hohn and others. >> jackd comes with ABSOLUTELY NO WARRANTY >> This is free software, and you are welcome to redistribute it >> under certain conditions; see the file COPYING for details >> >> JACK compiled with System V SHM support. >> loading driver .. >> creating alsa driver ... hw:0|hw:0|1024|2|48000|0|0|nomon|swmeter|-|32bit >> control device hw:0 >> configuring for 48000Hz, period = 1024 frames (21.3 ms), buffer = 2 periods >> ALSA: final selected sample format for capture: 32bit integer little-endian >> ALSA: use 2 periods for capture >> Floating point exception (core dumped) >> >> ------ >> The core says pretty much nothing, I think it happens more often when >> the build does not have debug symbols. >> +++++ >> Core was generated by `muse2'. >> Program terminated with signal 8, Arithmetic exception. >> #0 0x0804fa52 in main () >> (gdb) bt >> #0 0x0804fa52 in main () >> (gdb) thread >> [Current thread is 1 (Thread 0xb52e2740 (LWP 4384))] >> (gdb) thread 2 >> [Switching to thread 2 (Thread 0xb1450b40 (LWP 4385))] >> #0 0xb775d424 in __kernel_vsyscall () >> (gdb) bt >> #0 0xb775d424 in __kernel_vsyscall () >> #1 0xb5bb296b in pthread_cond_wait@@GLIBC_2.3.2 () from >> /lib/i386-linux-gnu/libpthread.so.0 >> #2 0xb62f664c in pthread_cond_wait () from /lib/i386-linux-gnu/libc.so.6 >> #3 0xb5a5833c in ?? () from /usr/lib/i386-linux-gnu/libjack.so.0 >> #4 0xb5baed4c in start_thread () from /lib/i386-linux-gnu/libpthread.so.0 >> #5 0xb62e8d3e in clone () from /lib/i386-linux-gnu/libc.so.6 >> +++++ >> >> Anyone else have seen this? It seems to happen more often the first >> time I start MusE.. but not really sure. >> >> Regards >> Robert >> > > (Sorry for the delay, been sick last week, better now.) > > Hm, OK I can think of a couple of possible causes: > > Do you run muse with the -L switch? > Otherwise LA(DI)SH will try to start Jack, maybe there's competition > between it and our own (-J) auto-starting of Jack ? > > The other possibility is this: > I see you are using Jack-1. > Not sure about Jack-1 but there was a bug in Jack-2 that caused MusE > to occasionally crash on startup. > I added a workaround for pre- Jack-1.9.9 versions which involves > a time delay. > > It is possible this time delay, in your case, is not enough: > > In main.cpp around line 658: > > ================================== > // WARNING Must do it this way. Call registerClient long AFTER Jack client is > // created and MusE ALSA client is > // created (in initMidiDevices), otherwise random crashes can occur within > // Jack <= 1.9.8. Fixed in Jack 1.9.9. Tim. > MusECore::initMidiDevices(); > // Wait until things have settled. One second seems OK so far. > for(int t = 0; t < 100; ++t) > usleep(10000); > // Now it is safe to call registerClient. > MusEGlobal::audioDevice->registerClient(); > ================================== > > Tip: To coax the problem out, try *reducing* or eliminating that delay > and see if it happens more frequently. > IIRC it happened more with lower Jack periods.
Good idea but it does not seem to be the reason. I tried increasing the usleep to 30000, which should mean 3 seconds wait and it's pretty much the same, fails often. Trying this on a core2duo laptop, a threading issue? I'll try to test with jackd2. Regards, Robert > > Hope that helps, lemme know because I should report this to Mr. Letz > who helped me with Jack-2 and corrected it in Jack-1.9.9. > > Tim. ------------------------------------------------------------------------------ Try New Relic Now & We'll Send You this Cool Shirt New Relic is the only SaaS-based application performance monitoring service that delivers powerful full stack analytics. Optimize and monitor your browser, app, & servers with just a few lines of code. Try New Relic and get this awesome Nerd Life shirt! http://p.sf.net/sfu/newrelic_d2d_apr _______________________________________________ Lmuse-developer mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/lmuse-developer
