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In alsamixer, there is an option called "Auto-Mute Mode", and it's enabled by default.

But now I want to disable it. I've tried different keys but failed.

Any idea? 0_0

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up vote 14 down vote accepted

Press right arrow to get to "auto-mute mode", then up or down arrow to change it, then Escape to exit.

You can make this automatic on boot by executing (perhaps in /etc/rc.local):

/usr/bin/amixer -c 0 sset "Auto-Mute Mode" Disabled
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thanks, guy~ it works. – Determinant Jul 20 '12 at 13:02
    
@Sam And would you have any idea on how to make this change permanent? Every time I restart my pc it gets reset. – Xero Sep 9 '12 at 19:19
1  
try google: alsa save mixer settings – Sam Watkins Oct 26 '12 at 5:24
1  
I would like to disable auto mute mode, but I don't have it, and amixer -c 0 contents doesn't show anything to that effect, and amixer -c 0 sset "Auto-Mute Mode" Disabled returns "Unable to find simple control 'Auto-Mute Mode',0". When I plug in my headphones, the speakers stop playing, though. Any ideas how I can change the setting? – Limited Atonement Oct 24 '15 at 21:15
2  
@LimitedAtonement I don't know. Perhaps your sound device isn't fully supported by Linux kernel drivers, or perhaps the "auto mute" is done in hardware and can't be overridden in software. – Sam Watkins Oct 26 '15 at 9:59

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