[Resolved?] Re: [Hardy] NX (NoMachine) Sound/No Sound

Daniel T Chen crimsun at fungus.sh.nu
Thu Nov 27 20:01:12 UTC 2008

On 11/27/2008 02:31 PM, NoOp wrote:
> I: module-volume-restore.c: Restoring sink for
> <pulsecore/protocol-native.c$gnome-sound-properties>
> I: module-volume-restore.c: Restoring volume for
> <pulsecore/protocol-native.c$gnome-sound-properties>
> I: module-alsa-sink.c: Trying resume...
> E: module-alsa-sink.c: Error opening PCM device front:0: Device or
> resource busy
> D: module-suspend-on-idle.c: Sink
> alsa_output.pci_8086_24d5_sound_card_0_alsa_playback_0 becomes busy.

PulseAudio is configured (by default) to grab hw:* instead of 
default:*.  The implication of this configuration is that dmix and 
dsnoop are not active, so if any other application has used either hw:* 
or default:* (or dmix:*, dsnoop:*, or asym:*), then the pulse daemon 
will throw the above error.

That said, it is fairly straightforward to configure the pulse daemon to 
use dmix:* for sinks and dsnoop for sources, but such a configuration 
deviates from what upstream recommends, so Ubuntu does not ship such a 
configuration active by default.

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