12.04 sound keeps auto-muting when idle

Posted by fali on Ask Ubuntu See other posts from Ask Ubuntu or by fali
Published on 2012-09-21T05:30:56Z Indexed on 2012/09/21 9:50 UTC
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12.04

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sound

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hp

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mute

I just installed 12.04 on an HP8510W. Everything works fine except for one weird behavior which I have noticed. When ever there is no audio playing, the audio mute indicator on the laptop is on. As soon as I start playing a you tube video the mute indicator turns off and I get sound.

Here is my pulse audio output which says that the sink is suspended because it is idle:

Welcome to PulseAudio! Use "help" for usage information.
list-sinks
1 sink(s) available.
index: 0
    name: <alsa_output.pci-0000_00_1b.0.analog-stereo>
    driver: <module-alsa-card.c>
    flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
    state: SUSPENDED
    suspend cause: IDLE

I tried running alsamixer, but I don't see the auto-mute option.

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