Colin Guthrie wrote: > 'Twas brillig, and David Henningsson at 09/01/10 09:00 did gyre and gimble: >> The pulse ALSA plugin has been known, for a while, to not work properly, >> causing underruns, hangs etc. I sat down yesterday trying to figure it >> out, and I'm pretty certain this patch improves the situation, but I >> don't mind getting some help testing it before it is committed upstream. >> >> Related bug: https://bugs.launchpad.net/bugs/485488 >> >> The patch is for the alsa-plugins tree at git.alsa-projects.org. > > I applied this to 1.0.22 (cleanly) and sadly it's not helping my test > case using mpg123. > > I'm sure you've discussed the problem with Daniel (who pointed me at > mpg123 in the first place), but I do still get crazy startups. It seems > to be pretty stable after startup tho', so it's maybe just an > initialisation issue? > > Before the patch mpg123 would hang once in a while. I've tried to get it > to do the same after the patch, but so far it's not hung so I think > after the initial startup it does seem to stablise better than before. > > Now there are of course potential bugs in mpg123's alsa implem. I've not > looked at this at all - just using it blindly as a test case. Actually, I was unaware of the mpg123 issue, and if you say it neither makes the startups better or worse, I think that is something else. I've never heard that kind of trouble in any other application either. As for mpg123, it uses these sw parameters: snd_pcm_sw_params_set_start_threshold(pcm, sw, 1) snd_pcm_sw_params_set_avail_min(pcm, sw, 1) ...but that is perhaps not enough to explain the problem. My own test case was FluidSynth, and people in the bug link above have other test cases. // David
