<p><br>
><br>
> In case it may be of interest to anyone with the same or similar issue,<br>
> here is a "behavioral schematic" that seems to accurately reflect the<br>
> relationship between {pavucontrol/pactl/pacmd/amixer} mute and the hardware<br>
> mute function and LEDs on my T-510, showing the differences across the<br>
> kernel change between 3.18 and 3.19:</p>
<p>><br>
> <a href="http://misc.postpro.net/t510led/schematic_view.jpg">http://misc.postpro.net/t510led/schematic_view.jpg</a><br>
><br>
> (</p>
<p>You have not posted alsa-info of working 3.18</p>
<p>Refer to alsa-info found in t510 speaker powersave regression</p>
<p><a href="https://lkml.org/lkml/2012/12/22/113">https://lkml.org/lkml/2012/12/22/113</a><br></p>
<p>!!-------Mixer controls for card 29 [ThinkPadEC]</p>
<p>Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT46WW-1.21'<br>
Mixer name : 'ThinkPad EC 6MHT46WW-1.21'<br>
Components : ''<br>
Controls : 1<br>
Simple ctrls : 1<br>
Simple mixer control 'Console',0<br>
Capabilities: pswitch pswitch-joined<br>
Playback channels: Mono<br>
Mono: Playback [on]</p>
<p>Do this console playback switch has any effect on your schematic view ?<br><br></p>
<p>Soundcards recognised by ALSA<br>
!!-----------------------------</p>
<p> 0 [MID ]: HDA-Intel - HDA Intel MID<br>
HDA Intel MID at 0xf2620000 irq 45<br>
29 [ThinkPadEC ]: ThinkPad EC - ThinkPad Console Audio Control<br>
ThinkPad Console Audio Control at EC reg 0x30, fw 6MHT46WW-1.21<br><br></p>
<p>AFAIK, pulseaudio ignore card 29 "ThinkPadEC"</p>
<p><a href="http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules?id=078a39af886ea3bb590595b973343af77c2837fe">http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/src/modules/alsa/mixer/profile-sets/90-pulseaudio.rules?id=078a39af886ea3bb590595b973343af77c2837fe</a></p>