On Thu, 14 Feb 2002, Kai Vehmanen wrote: > 2.a) way to notice that an xrun has happened during b->c > b) ability to reset the streams > 3. way to make sure that engine->process() never takes longer > than period_time*number_of_periods
More debug information follows. I changed jackd code so that if the time between mmap_begin() -> mmap_commit() exceeds total amount of buffering, we do a forced restart. Normal 'snd_pcm_drop() -> snd_pcm_prepare() -> snd_pcm_start()' sequence doesn't solve the problem. Audio is still garbled. I didn't try full 'close() -> ... -> open() -> ..' cycle yet, as that would involve quite a lot of work (jackd's alsa_driver.c is a long piece of code). What I did try was replacing drop() with snd_pcm_drain() and this resulted in a hang (not a kernel hang, but process never returns to user-space) in the driver level. Here's the backtrace: #0 0x40127b54 in __ioctl () from /lib/libc.so.6 #1 0x401f9da0 in __DTOR_END__ () from /usr/lib/libasound.so.2 #2 0x401b0063 in snd_pcm_drain (pcm=0x805af58) at pcm.c:922 #3 0x401735eb in alsa_driver_audio_stop (driver=0x8053ec0) at alsa_driver.c:616 #4 0x401740c7 in alsa_driver_wait (driver=0x8053ec0) at alsa_driver.c:965 After this, jackd needs to be killed with SIGKILL. -- http://www.eca.cx Audio software for Linux! _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
