From: bugtrack@alsa-project.org
To: alsa-devel@alsa-project.org
Subject: [ALSA - driver 0001731]: Fixed chip configuration for 5.1 in ALC850 code
Date: Wed, 11 Jan 2006 01:37:57 +0100 [thread overview]
Message-ID: <ff9e6443c5aa94976c7227d115a1a795@bugtrack.alsa-project.org> (raw)
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1731>
======================================================================
Reported By: C-MoH
Assigned To:
======================================================================
Project: ALSA - driver
Issue ID: 1731
Category: PCI - intel8x0
Reproducibility: always
Severity: major
Priority: normal
Status: new
Distribution:
Kernel Version:
======================================================================
Date Submitted: 01-11-2006 01:17 CET
Last Modified: 01-11-2006 01:37 CET
======================================================================
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)
======================================================================
----------------------------------------------------------------------
rlrevell - 01-11-06 01:33
----------------------------------------------------------------------
I guess you verified that the patch does not break anything, by testing all
combinations of the "default", "front", "rear", "centerLFE", "surround51"
etc PCMs and surround-related mixer settings, with regular stereo and mono
.wav files?
----------------------------------------------------------------------
C-MoH - 01-11-06 01:37
----------------------------------------------------------------------
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.
Issue History
Date Modified Username Field Change
======================================================================
01-11-06 01:17 C-MoH New Issue
01-11-06 01:17 C-MoH File Added: cipi.patch
01-11-06 01:21 C-MoH Issue Monitored: C-MoH
01-11-06 01:22 C-MoH Note Added: 0007553
01-11-06 01:33 rlrevell Note Added: 0007554
01-11-06 01:37 C-MoH Note Added: 0007555
======================================================================
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next reply other threads:[~2006-01-11 0:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-11 0:37 bugtrack [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-01-12 11:46 [ALSA - driver 0001731]: Fixed chip configuration for 5.1 in ALC850 code bugtrack
2006-01-12 0:22 bugtrack
2006-01-11 17:38 bugtrack
2006-01-11 10:54 bugtrack
2006-01-11 0:40 bugtrack
2006-01-11 0:33 bugtrack
2006-01-11 0:22 bugtrack
2006-01-11 0:17 bugtrack
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