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Thread: I can't stand alsa backend..

  1. #1

    Unhappy I can't stand alsa backend..

    Would somebody mind telling me how to set PulseAudio as the default sound server for adobe flash (using the plugin from Ubuntu restricted extras, 11.2 r202) and Skype (v 4.2.0.11)? For Skype, I tried installing PAVU and making sure my settings were correct (as SKype's website instructed), but this didn't work. This is a brand new install of Ubuntu 12.04 x86_64, with only system and driver (graphics) updates applied.
    If anybody could help, I'd appreciate it.

  2. #2
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    Re: I can't stand alsa backend..

    What do you mean exactly?

    Skype uses PulseAudio if it is present (Ubuntu has PulseAudio by default, as Xubuntu and Kubuntu, I think).

    Also, Flash uses PulseAudio indirectly, through PulseAudio's alsa plugin that redirects all dmix streams to itself.

  3. #3

    Re: I can't stand alsa backend..

    Then colour me confused, because ALSA is set as the default in Skype (installed via .deb package from Skype's website). I can tell because of the selection menu. As for Flash, something's screwy, then.. When voice calling over Skype + playing a youtube video in FF 21.0, Flash freezes. This does not happen when that 1 channel ALSA gives you isn't already in use.

  4. #4
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    Re: I can't stand alsa backend..

    Quote Originally Posted by DiabolicalClaptrap View Post
    Then colour me confused, because ALSA is set as the default in Skype (installed via .deb package from Skype's website). I can tell because of the selection menu. As for Flash, something's screwy, then.. When voice calling over Skype + playing a youtube video in FF 21.0, Flash freezes. This does not happen when that 1 channel ALSA gives you isn't already in use.
    So you are saying that you are not currently using PulseAudio but wish to enable it.

    Are you running Ubuntu or one of its other flavours?

    What's the output of
    Code:
    ps -A | grep pulse
    and, also, the output of
    Code:
    fuser -fv /dev/snd/*

  5. #5
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    Re: I can't stand alsa backend..

    Also, you can check if pulseaudio is installed with
    Code:
    apt-cache policy pulseaudio

  6. #6

    Re: I can't stand alsa backend..

    This is a fresh install of 12.04 Ubuntu x86_64. Pulse hasn't been uninstalled and should be enabled.

    Output of ps -A | grep pulse:
    Code:
    1748 ?        00:00:47 pulseaudio

    fuser -fv /dev/snd/*:
    Code:
                         USER        PID ACCESS COMMAND
    /dev/snd/controlC0:  ryan       1748 F.... pulseaudio
    /dev/snd/controlC1:  ryan       1748 F.... pulseaudio
    /dev/snd/controlC2:  ryan       1748 F.... pulseaudio
    /dev/snd/pcmC1D0c:   ryan       1748 F...m pulseaudio
    /dev/snd/pcmC2D0p:   ryan       1748 F...m pulseaudio

  7. #7
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    Re: I can't stand alsa backend..

    Maybe has something to do with the fact that skype is 32-bit. If you install the libasound2-plugins:i686 package, does that help?

  8. #8
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    Re: I can't stand alsa backend..

    Pulseaudio needs either ALSA or OSS installed as it's backend to communicate audio to the hardware.

    As a Ubuntu installation doesn't have OSS installed by default if you removed ALSA you would break PulseAudio.

    pulseaudio-diagram.jpg
    Cheesemill

  9. #9

    Re: I can't stand alsa backend..

    I just want access to multiple audio channels. As of now I'm unable to simultaneously access Youtube thru Flash and voice chat on Skype. If I open YT while on call, it hangs. If on YT while making a call, the call will fail due to a "hardware playback issue".

    Quote Originally Posted by Temüjin View Post
    Maybe has something to do with the fact that Skype is 32-bit. If you install the libasound2-plugins:i686 package, does that help?
    Just tried. No go.

  10. #10

    Re: I can't stand alsa backend..

    Did some heavy digging and found this, which solved my issue (uploaded txt below in case post vanishes)

    PA.txt
    Last edited by DiabolicalClaptrap; June 1st, 2013 at 03:37 PM.

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