Public bug reported:
Binary package hint: libasound2
I found out, that 5.1 surround sound from my audio card is somehow
weird.
Using "speaker-test -D plug:surround51 -c 6 -t wav" I came to a
conclusion, that it's like the yellow and black jacks in my soundcard
are swapped. But they aren't. speaker-test probing 4.0 sound was ok - so
this is another proof.
Finally I found two configuration files:
(1) /usr/share/alsa/cards/ICH.conf
(2) /usr/share/alsa/cards/ICH4.conf
The first file concerns ICH, ICH2 and ICH3 chipsets. In
ICH.pcm.surround51.0 section the channels are remapped. It virtually
swaps the yellow and black jack.
The second one concerns ICH4, ICH5 and ICH6. But there is no channel
remapping. I added it and it works!
Is there anyone with newer ICHs with the same problem?
00:1f.5 Multimedia audio controller: Intel Corporation 82801EB/ER (ICH5/ICH5R)
AC'97 Audio Controller (rev 02)
Ubuntu 8.04.1
libasound2 version 1.0.15-3ubuntu4
** Affects: alsa-lib (Ubuntu)
Importance: Undecided
Status: New
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incorrect channel mapping for surround 5.1 on ICH5
https://bugs.launchpad.net/bugs/257027
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