Am Thu, 02 Jul 2009 16:20:37 +0100 schrieb Colin Guthrie <gmane at colin.guthr.ie>: > 'Twas brillig, and Timothy J Massey at 02/07/09 16:30 did gyre and > gimble: > > Dan Chen <crimsunkg at yahoo.com> wrote on 07/02/2009 09:35:08 AM: > > > >> Timothy J Massey <tmassey <at> obscorp.com> writes: > >>> Basically, I cannot keep PA up and running under Ubuntu 9.04. > >> The symptoms stem from Ubuntu issues _much_ more so than > >> PulseAudio > > ones. > >> Essentially, move to Karmic asap, because there's little momentum > >> to put 2.6.31-git and PulseAudio 0.9.15 into Jaunty. > > > > I did. It has helped a fair amount (I can move sink-inputs without > > crashing), but it's still pretty flaky. Crashing PulseAudio is > > still pretty easy... > > Get us some nice, ripe, juicy backtraces and we'll see what can be > done :) > > http://www.pulseaudio.org/wiki/Community#BugsPatchesTranslations > > Col > I use Pulseaudio in ubuntu jaunty (64bit), and I had quite some issues with it at first, too. Here's my recipe for a rock solid system: Mainly because of the new features and conveniance I do use the pulseaudio-packages from the development branch of ubuntu (karmic), but just for that! I just updated the system from the stable tree, then changed the sources.list to point to karmic repositories, installed pulseaudio 0.9.15, and then changed the sources.list back to jaunty. Critics say this brakes packet management, but I haven't noticed any side effects, yet. As it turns out all of my problems went away when I tuned the buffering parameters at the end of the daemon.conf for my hardware (trial and error, start with something close to the defaults, if that doesn't work use something way off and then work your way back) and reduced the resampling quality! Pulseaudios resamplers are very sophisticated, even the lower quality ones produce reasonably good sound, and the high quailty settings are extremely CPU-intensive and don't scale well across multiple cores! Most of my crashes were caused by the CPU simply not keeping up with processing the audio frames, so the streams went out of sync and the whole thing fell apart. Seriously, I tried the top 10 or so quality settings for upmixing stereo to 7.1 and it simply isn't happening on my Core2Duo T9500 with realtime priority. I now use a lower resampling setting and Pulseaudio just works. Pretty much the only way to crash it is to use module.combine with my 4 cheap soundcards on a lousy (=hot) day when the cards' timing crystals are badly out of sync. It happens from time to time, but I can live with that. Also think about what sampling rates you really need your server to run on. If you use cheap desktop speakers and mainly listen to mp3s ripped from CD then there's not much point in forcing your server to resample everything to 24bit/192KHz... Hope that helps. Jost
