Preliminary Checks:
The speakers are builtin to this laptop, and there is audible output when I
play any sound file. (Issue is still that below 20% = no sound out of
speakers).
1. Speakers *are* plugged in, switched on.
2. Speakers are *not* muted. (I hear sound.)
Advanced troubleshooting 1 (mixers at the ALSA level): Using Alsamixer
via the terminal.
1. Choosing the 'Master' volume bar, and using the up/down arrows,
the volume correctly increases/decreases in decibel output.
2. The percentage changes in small increments (between 1 and 5).
However, it will not settle on a value between 0 and 16.
To elaborate, if in another shell, I use amixer to set the volume to 0%,
alsamixer shows the Master volume bar as 0 and no sound comes from the speakrs.
If I use amixer to set the volume to 1%, alsamixer shows the Master volume as
16, and there is an appropriate jump in speaker decibel output, which I'd
estimate as 16% of the maximum decibel output:
$ amixer set "Master",0 0% --quiet # --> Alsamixer: Master = 0
$ amixer set "Master",0 1% --quiet # --> Alsamixer: Master = 16
Do you need more information?
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https://bugs.launchpad.net/bugs/429844
Title:
audio level between 0 and 20% not output
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