[ALSA - driver 0001731]: Fixed chip configuration for 5.1 in ALC850 code

bugtrack
2006-01-11T00:40:36Z

Last Modified: 01-11-2006 01:40 CET
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Summary: Fixed chip configuration for 5.1 in ALC850 code
Description:
Frustrated by the fact that the 5.1 DVD I just bought had no voices (since
they were on the center channel) I started to dig into it. The details are
in the "steps to reproduce".

Attached is a (very) small patch that fixed it completely on my system
(both the mixer and the channel mix-up). My guess is that the chip was
misconfigured by lack of a bit in the MX76 register. (2 instead of 5 for
bits 6:4)
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C-MoH - 01-11-06 01:37
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Hmmm.. where did the "steps to reproduce" section dissapear?

In short, the mixer for center and lfe were completely useless.
speaker-test -Dsurround51 -c6 proved that center and lfe were not making
sound and rear speakers were weirdly mangled with the center speaker.
Different channel routes in asoundrc made the sound come from center and
lfe but made rear speakers mute etc.

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rlrevell - 01-11-06 01:40
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Unfortunately it only appears in the advanced view, I don't like this
either.

So you are saying you regression tested your patch fully?