Bug 253777 - SPDIF output for AD1988b chipset doesn't work correctly with non-AC3 content
SPDIF output for AD1988b chipset doesn't work correctly with non-AC3 content
Status: CLOSED CURRENTRELEASE
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
7
All Linux
low Severity low
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Assigned To: Kernel Maintainer List
Fedora Extras Quality Assurance
: Reopened
Depends On:
Blocks:
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Reported: 2007-08-21 16:55 EDT by Timo-Pekka Viljamaa
Modified: 2008-01-11 12:44 EST (History)
1 user (show)

See Also:
Fixed In Version: 2.6.23
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2008-01-11 12:44:41 EST
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Description Timo-Pekka Viljamaa 2007-08-21 16:55:14 EDT
Description of problem:

SPDIF output for AD1988b chipset doesn't work correctly with non-AC3 content.
The sound is played, but it has distortions. There's already a patch in
alsa-kernel to fix this problem:
http://hg-mirror.alsa-project.org/alsa-kernel/rev/43059389c583
http://mailman.alsa-project.org/pipermail/alsa-devel/2007-July/002213.html

Version-Release number of selected component (if applicable):


How reproducible:
A motherboard with AD1988b sound chipset is needed, for example Asus P5B-E

Steps to Reproduce:
1. aplay -D spdif some.wav
  
Actual results:
The wav file is played, but the sound has distortions. If the wav is played
through non-SPDIF connection everything is ok.

Expected results:
The wav file would be played similarly through both SPDIF and non-SPDIF
connection without any distorsions.

Additional info:
Comment 1 Chuck Ebbert 2007-09-07 09:30:21 EDT
kernel-2.6.22.5-76.fc7 is in the updates-testing repository with a fix for this bug.

Comment 2 Timo-Pekka Viljamaa 2007-11-20 12:51:33 EST
This bug re-occurred with kernel-2.6.23.1-21.fc7 using alsa-lib 1.0.14-3.fc7. I
also tried with alsa-lib 1.0.15-1.fc9, but it doesn't work either.
kernel-2.6.22.9-91.fc7 works ok.
Comment 3 Chuck Ebbert 2007-11-27 14:17:47 EST
Patch was dropped during update to 2.6.23. Re-added.
Comment 4 Christopher Brown 2008-01-11 12:44:41 EST
Hello,

I'm reviewing this bug as part of the kernel bug triage project, an attempt to
isolate current bugs in the Fedora kernel.

http://fedoraproject.org/wiki/KernelBugTriage

Given that the patch was confirmed working before and has been re-added with no
additional comment from the reporter I am closing this CURRENTRELEASE. Please do
not hesitate to re-open if it is still an issue for you. Thank you for filing
the bug.

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