Comment # 29 on bug 928394 from Takashi Iwai

(In reply to Leslie Satenstein from comment #28)
> alsactl monitor 
> 
> does not indicate headphone in or transition to/from out on my desktop
> system..
> 
> However, executing diff between  pairs of files shows differences in some
> fields, which I believe may serve to indicate headphone in/out.

The question is *which* fields changed.  Please give the diff output. 
Otherwise one cannot judge.

> With desktop and headphones in, speakers remain active. 

Yeah, that's already the problem.  This should have been muted like laptop.

> With laptop, speakers are muted with headphones in.