[pulseaudio-discuss] ThinkPad T-510 audio output mute LED non-workingness

Raymond Yau superquad.vortex2 at gmail.com
Sat Apr 18 19:47:11 PDT 2015

> In case it may be of interest to anyone with the same or similar issue,
> here is a "behavioral schematic" that seems to accurately reflect the
> relationship between {pavucontrol/pactl/pacmd/amixer} mute and the
> mute function and LEDs on my T-510, showing the differences across the
> kernel change between 3.18 and 3.19:

>     http://misc.postpro.net/t510led/schematic_view.jpg
> (

You have not posted alsa-info of working 3.18

Refer to alsa-info found in t510 speaker powersave regression


!!-------Mixer controls for card 29 [ThinkPadEC]

Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
  Mixer name : 'ThinkPad EC 6MHT46WW-1.21'
  Components : ''
  Controls      : 1
  Simple ctrls  : 1
Simple mixer control 'Console',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]

Do this console playback switch has any effect on your schematic view ?

Soundcards recognised by ALSA

0 [MID            ]: HDA-Intel - HDA Intel MID
                      HDA Intel MID at 0xf2620000 irq 45
29 [ThinkPadEC     ]: ThinkPad EC - ThinkPad Console Audio Control
                      ThinkPad Console Audio Control at EC reg 0x30, fw

AFAIK, pulseaudio ignore card  29 "ThinkPadEC"

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