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[Libreboot-dev] How comes `ThinkPad Console Audio Control` in Libreboot
From: |
Jorge Araya Navarro |
Subject: |
[Libreboot-dev] How comes `ThinkPad Console Audio Control` in Libreboot T60 cannot be changed from software? (i.e.: using amixer or alsamixer) |
Date: |
Fri, 11 Dec 2015 15:40:55 -0600 |
User-agent: |
mu4e 0.9.13; emacs 24.5.1 |
Hello, guys!
As some may experienced, when you wake or boot your Libreboot T60, the audio is
mute. This is
because the `ThinkPad Console Audio Control` is muted and set with 0% of
volume. What we, the users,
do is to gain sound is simply to press the volume up button on the keyboard
(the one aside the blue
ThinkVantage button).
But I discovered, horrified, that you cannot do the same using amixer or
alsamixer, not even as
root.
--8<---------------cut here---------------start------------->8---
~ amixer -c 29 get Console,0
Simple mixer control 'Console',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 14
Mono: Playback 0 [0%] [off]
~ amixer -c 29 set Console,0 playback 0% mute
Simple mixer control 'Console',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 14
Mono: Playback 0 [0%] [off]
~ amixer -c 29 set Console,0 playback 100% unmute
amixer: Invalid command!
✘ ~ # pressing the buttons on the keyboard...
✘ ~ amixer -c 29 get Console,0
Simple mixer control 'Console',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 14
Mono: Playback 12 [86%] [on]
~
--8<---------------cut here---------------end--------------->8---
`amixer: Invalid command!`, wtf?!
With `alsamixer` no matter how many times I push the ↑ key or the M key, the
channel Console is
never unmute and/or gain volume.
The sound issue is annoying and worth fixing anyway, but this impossibility of
changing by software
the Console channel of ThinkPad Console Audio makes almost impossible any
workaround[1].
I hope this is a issue in Libreboot.
[1]: https://wiki.parabola.nu/User:Shackra/libreboot-volume-problem
--
👋 Pax et bonum.
Jorge Araya Navarro
https://es.gravatar.com/shackra
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Jorge Araya Navarro <=