new laptop, no sound in spite of driver attaching

[Wojciech Puchar]

> Here is mine:
> hdacc0: <Realtek ALC1220 HDA CODEC> at cad 0 on hdac0
> hdaa0: <Realtek ALC1220 Audio Function Group> at nid 1 on hdacc0
> pcm0: <Realtek ALC1220 (Internal Analog)> at nid 20 and 18 on hdaa0
> pcm1: <Realtek ALC1220 (Left Analog)> at nid 27 and 25 on hdaa0
> pcm2: <Realtek ALC1220 (Left Digital)> at nid 30 on hdaa0
> 
> For me, I have to tickle the following sysctl's to get expected sound.
> 
> hw.snd.vpc_0db
> hw.snd.vpc_reset
> hw.snd.vpc_autoreset
>
i tried this without results
i think it is different problem.

kernel: pcm0: chn_write(): pcm0:virtual:dsp0.vp0: play interrupt timeout, channel dead