Red Hat Bugzilla – Bug 391011
Hydrogen doesn't use pulseaudio correctly
Last modified: 2009-01-09 02:27:47 EST
Description of problem:
When I start hydrogen it takes over the sound system and prevents other
applications sharing sound. I checked with pavucontrol and sure enough hydrogen
is not registered as using the pulse audio sound server. I can only get sound
back for other apps by killing hydrogen.
I tried starting hydrogen using padsp (padsp hydrogen), but that didn't help either.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. install hydrogen
2. start hydrogen
3.try and play something through amarok
hydrogen drums play but amarok appears to play, but no sound is heard from it.
Amarok appears in the pulseaudio volume control, but hydrogen doesn't
both apps should appear in the volume control and I should hear both on my speaker.
Thanks for your report, Brian.
This is a known issue - in fact, hydrogen does not contain any pulseaudio
support at all. If I recall correctly, it uses ALSA. That's also why padsp did
not help -- padsp emulates the OSS device.
Please either try to select OSS output in Hydrogen and use padsp, or configure
ALSA to pipe sound output to Pulseaudio.
You might find this paragraph helpful:
Please let me know if you had any success configuring Hydrogen with ALSA or OSS
(In reply to comment #1)
> Please either try to select OSS output in Hydrogen and use padsp, or configure
> ALSA to pipe sound output to Pulseaudio.
Or try to use Jack, which is another option in Hydrogen.
Thanks for the help.
A few problems:
1) I can select OSS as a driver, but I get an error about it not being compiled in.
2) I tried creating the ~/.asoundrc file with definitions for the "pulse" device
described in the link you included. I can use 'aplay -Dpulse Diddley.wav' to
play the diddley song demo exported as a wav file. However, if I select the
alsa driver and set the device to "pulse", hydrogen will start using 100% of one
of my processors, but not play anything. The menus are responsive, but the
Diddley demo doesn't play. I can hit stop and it continues to use 100% of the
CPU. When I try and set the ALSA hardware device back to "hw:0", hydrogen
freezes--not responding to any input or redraw events--until I kill it.
I haven't tried making a pulse device my default yet.
This sucks. And it needs to be fixed upstream, I am not able to fix it myself now.
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