Hi,
I have a SiS 648-based motherboard (Asus P4S8X) with a SiS 7012 AC'97
audio coupled with a C-Media 9739 codec (id 0x434D4961).
For some reason, mixer settings under Linux work in a binary fashion:
either mute, or full volume, but no gradation.
I've fixed ac97_codec.c so that it detects the codec, but then I'm
stuck. I got the 9739 technical documentation from C-Media's site, but
it does not help much - it seems that the values put in the registers
are all right.
I suspect some bypass mechanism or some bit that turns analog mixing
off, but I don't see anything in the documentation about it.
Would somebody with the same motherboard care to do some experiments?
Playing a sample with xmms, one can set volume to "mute", any other
value gives a constant volume.
It's also impossible to record anything - the recording is blank.
Regards,
D. Monniaux
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Feb 28 2003 - 22:00:46 EST