[alsa-devel] Surround sound not working on ALC887 based motherboard
Hello,
I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + Realtek ALC887-VD, alsa only lets me access the first 2 channels (stereo), but not the 6 other ones. It works fine in Windows.
Trying to run this after killing pulseaudio fails:
$ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 4 aplay: set_params:1239: Channels count non available
Output from alsa-info: http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a
2014/1/10 Olivier Crête olivier.crete@ocrete.ca
Hello,
I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + Realtek ALC887-VD, alsa only lets me access the first 2 channels (stereo), but not the 6 other ones. It works fine in Windows.
Trying to run this after killing pulseaudio fails:
$ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 4 aplay: set_params:1239: Channels count non available
Output from alsa-info: http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a
--
post output of pactl list or pulseaudio verbose log
you have to change channel mode from 2ch to 6ch to retask the input jacks as output if your motherboard only have three audio jacks at rear panel
do you mean pulseaudio cannot probe the surroun40 or surround51 profile ?
Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch'
Hi,
On Mon, 2014-01-13 at 18:16 +0800, Raymond Yau wrote:
2014/1/10 Olivier Crête olivier.crete@ocrete.ca I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + Realtek ALC887-VD, alsa only lets me access the first 2 channels (stereo), but not the 6 other ones. It works fine in Windows.
Trying to run this after killing pulseaudio fails: $ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 4 aplay: set_params:1239: Channels count non available Output from alsa-info: http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a
post output of pactl list or pulseaudio verbose log
http://www.ocrete.ca/surround/pactl-list.txt http://www.ocrete.ca/surround/pulseaudio-vv.txt
you have to change channel mode from 2ch to 6ch to retask the input jacks as output if your motherboard only have three audio jacks at rear panel
How would one do that ? Pulseaudio only offers Stereo profiles.
do you mean pulseaudio cannot probe the surroun40 or surround51 profile ?
Yes, but I can't use it with aplay even without pulseaudio running.
Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch'
I have a Asus P5G41T-M LX Plus motherboard which is ICH7 + Realtek ALC887-VD, alsa only lets me access the first 2 channels (stereo), but not the 6 other ones. It works fine in Windows. Trying to run this after killing pulseaudio fails: $ aplay -D surround40:0 -f S16_LE -r 44100 -c 4 /dev/zero -v Playing raw data '/dev/zero' : Signed 16 bit Little Endian, Rate 44100 Hz, Channels 4 aplay: set_params:1239: Channels count non available Output from alsa-info:
http://www.alsa-project.org/db/?f=fe378d28f0dbb5a427b005d20866a762fd37d31a
you have to change channel mode from 2ch to 6ch to retask the input jacks as output if your motherboard only have three audio jacks at rear panel
Simple mixer control 'Channel Mode',0 Capabilities: enum Items: '2ch' '4ch' '6ch' Item0: '2ch'
How would one do that ? Pulseaudio only offers Stereo profiles.
amixer -c0 set "Channel Mode" "6ch"
you can logout and login after you set the channel mode to 6ch so that pulseaudio is restarted.
this also require
alsactl store this setting before computer shutdown
alsactl restore this setting after computer boot
post output of pactl list or pulseaudio verbose log
http://www.ocrete.ca/surround/pactl-list.txt http://www.ocrete.ca/surround/pulseaudio-vv.txt
do you mean pulseaudio cannot probe the surroun40 or surround51 profile ?
Yes, but I can't use it with aplay even without pulseaudio running.
try speaker-test -c 6 -t wav -Dhw:0,0 after you set the channel mode to 6ch
participants (2)
-
Olivier Crête -
Raymond Yau