Re: ALSA: Conexant CX20585 (thinkpad t510) speaker powersaveregression

[Kevin Fenzi]

On Tue, 08 Jan 2013 16:26:38 +0100
Takashi Iwai <tiwai@xxxxxxx> wrote:

> It's a known problem that some people have already reported, but
> currently no clue who actually turns down the pin to D3.
> Conexant guys wrote me that the codec doesn't do it by itself, and the
> driver neither, AFAIK.  A possible answer is the firmware / BIOS, but
> who knows.

Thanks for the answer! :) 

> In anyway, could you try to trace the hd-audio events and see whether
> the power down is *not* issued by the driver when you see this state?
> See Documentation/sound/alsa/HD-Audio.txt, the section "Tracepoints"
> for a brief instruction.

I can give it a try... 

kevin

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