Hi,
I have an Atom based vehicle computer (Poulsbo chipset) with an Intel HDA
"card". For some reason it has two identical codecs, both Realtek ALC888. One
is hooked to the speakers built into the display; the other is attached to the
line in/out on the back of the computer. I am trying to get the back ones
working, and I never get any audio out of them.
It appears they both do show up:
$ ls /proc/asound/card0
codec#0 codec#1 id pcm0c pcm0p pcm2c pcm4c pcm4p pcm5c
$ cat /proc/asound/pcm
00-00: ALC888 Analog : ALC888 Analog : playback 1 : capture 1
00-02: ALC888 Analog : ALC888 Analog : capture 1
00-04: ALC888 Analog : ALC888 Analog : playback 1 : capture 1
00-05: ALC888 Analog : ALC888 Analog : capture 1
but there are a couple of serious problems:
$ amixer
ALSA lib simple_none.c:1551:(simple_add1) helem (MIXER,'Master Playback
Switch',0,1,0) appears twice or more
amixer: Mixer default load error: Invalid argument
(running alsamixer yields the same results)
Second, I tried to configure the second device as:
pcm.backout {
card 0
device 4
}
but I can't get aplay -D backout to play. It doesn't like any combination of
number of channels I throw at it.
At this stage of alsa development, should this work?
Here's some version information
Linux 3.2.0-23-generic-pae #36-Ubuntu SMP Tue Apr 10 22:19:09 UTC 2012 i686
i686 i386 GNU/Linux
alsa-base 1.0.25+dfsg-0ubuntu1
alsa-utils 1.0.25-1ubuntu5
libasound2 1.0.25-1ubuntu10
linux-sound-base 1.0.25+dfsg-0ubuntu1
--Chris
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