Re: ac97, alc101+kt8235 sound (2.4.21-pre7-ac1)

[Benson Chow]

Seems that the VT8235 has some issues with ac97 recording.  Using aumix,
and setting the input to line-in, cat /dev/dsp returns the same byte over
and over again, as if there is no signal.  Dumping this file and dumping
back to /dev/dsp confirms the silence - no sound got record.  Messing
around with the mixer doesn't appear to do much.  The mixer subsystem, I
can control the volume of line-in and line-out, and hear the volume going
up and down.  I also tried Windows, seems it works fine in Windows.

I tried the same command sequence on my SiS735 (i810-compatible) AC97
machine and the results differ (it works :-)  So it seems that there's
something that's wrong with the kt8235 side of things?

Playback works fine.  Just cannot record.  Is the kt8235 driver not quite
primetime yet?

Thanks,

-bc

On 15 Apr 2003, Alan Cox wrote:

> Date: 15 Apr 2003 12:36:51 +0100
> From: Alan Cox <[e-mail]>
> To: Benson Chow <[e-mail]>
> Cc: Linux Kernel Mailing List <[e-mail]>
> Subject: Re: ac97, alc101+kt8235 sound
>
> On Maw, 2003-04-15 at 12:49, Benson Chow wrote:
> > hoping that these via chips were pretty close.  Unfortunately no, it
> > still doesn't work.  It did, however, find the AC97 codec fine (I added
> > some printk's), but no sound is produced.  Any ideas on how to get this
> > vt8235-based motherboard sound working?  (and ALSA-0.9.2 seems to do
> > nothing but segfault it seems.)
>
> See 2.4.21pre - that has the driver for VIA8233/5
>

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