[Clam-devel] Re: Fwd: ALSA hangs randomly since non-mmap patch and JACK support removed from Ubuntu

Pau Arumí pau.arumi at barcelonamedia.org
Tue Nov 17 01:15:04 PST 2009

Hi Albert,

though CLAM's NetworkEditor supports PortAudio I personally always use
the native Jack backend, which is the one that works best no Linux.
PortAudio is often used in Windows and MacOSX.

I'm copying this to clam-devel in case some developer have also found
this bug annoying and wants to give feedback at ubuntu's bug tracker.

I see how this is an annoying problem for mixxx. If the situation
doesn't change maybe it is worth to take the CLAM approach of having a
abstract backend layer (we call it NetworkPlayer) that can be
implemented either using PortAudio or Jack directly or CoreAudio, etc. 
Of course this is not the ideal solution...


El dt 17 de 11 de 2009 a les 01:42 +0100, en/na Albert Santoni va
> Hey Pau,
> Have you seen anything like these random ALSA hangs with CLAM?
> Thanks,
> Albert
> ---------- Forwarded message ----------
> From: Albert Santoni <alberts at mixxx.org>
> Date: Mon, Nov 16, 2009 at 4:38 PM
> Subject: ALSA hangs randomly since non-mmap patch and JACK support
> removed from Ubuntu
> To: Portaudio Mailing List <portaudio at music.columbia.edu>
> Hello everyone,
> It looks like since the non-mmap patch was added to PortAudio, Mixxx
> has had problems randomly hanging when either opening a sound device
> or in the middle of playback. There is a lengthy bug report about this
> here, and it took us a while to figure out:
> https://bugs.launchpad.net/ubuntu/+source/portaudio/+bug/383431
> Has anyone else experienced this problem?
> I should mention that the packaged versions of PortAudio in both
> Ubuntu and Fedora include this patch, though I haven't seen people
> complaining about this.
> I also wanted to mention that Mixxx has been crippled in recent
> versions of Ubuntu because the package maintainers removed JACK
> support from PortAudio. This has been driving our users insane and I
> don't feel that the issue has received the attention it deserves from
> the Ubuntu people. If anyone else's project is affected by this bug,
> please mention it in this bug thread and help us attract some more
> attention: https://bugs.launchpad.net/ubuntu/+source/portaudio/+bug/360590
> Thanks,
> Albert

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