Red Hat Bugzilla – Bug 504180
surround sound doesn't work for snd-hda-intel : ALC 861
Last modified: 2010-06-28 08:48:39 EDT
Created attachment 346564 [details]
alsa-info for snd-hda-intel model=asus
Description of problem:
no snd-hda-intel model=XXX option works for soundcard in laptop Asus A6T. By default, only stereo works. With model=asus or 3stack or 3stack-660 more channels works but they are wrongly wired and no sound goes to headphone connector (it only mutes the front left+right sound).
First, I've tried to get surround sound working with pulseaudio, but setting channels = 6 produced message (something like) alsa-util.c: sound card doesn't allow 6 channels, using 2. But this was simply wrong.
I've removed everything pulseaudio related and tried to get it working with alsa only. There are several forums discussing badly working snd-hda-intel soundcards using different ALC XYZ chips (manufactured by intel/realtek), but usually with conclusion like: with model=XYZ it works.
For ALC861 I've tried:
3stack, 3stack-dig, 6stack-dig, 3stack-660, uniwill-m31, toshiba, asus, asus-laptop, 3stack-660-digout, lenovo, dallas, hp, auto
and none of them works. It seems this card is not so spread among users:
00:10.1 Audio device : nVidia Corporation MCP51 High Definition Audio [10de:026c] (rev a2)
dmesg contains (without option model to snd-hda-intel):
HDA Intel 0000:00:10.1: PCI INT B -> Link[LAZA] -> GSI 21 (level, low) -> IRQ 21
HDA Intel 0000:00:10.1: setting latency timer to 64
hda_codec: Unknown model for ALC861, trying auto-probe from BIOS...
ALSA sound/pci/hda/hda_codec.c:3507: autoconfig: line_outs=1 (0xb/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:3511: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:3515: hp_outs=1 (0xe/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:3516: mono: mono_out=0x0
ALSA sound/pci/hda/hda_codec.c:3524: inputs: mic=0xd, fmic=0x0, line=0xc, fline=0x0, cd=0x11, aux=0x0
With model=asus or 3stack or 3stack-660 more channels works but they are wrongly wired and no sound goes to headphone connector (it only mutes the front left+right sound).
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.create /etc/modprobe.d/sound.conf containing:
options snd-hda-intel model=asus
2.reload snd-hda-intel module or reboot
3.check nothing from front, master, headphon, pcm, front, surround, center, lfe is muted, set channel to 6ch
4.speaker-test -Dplug:surround51 -c6 -twav
front left/right - no sound
rear left/right - sound
center - sound (but low volume)
lfe - sound in center again (low volume)
when nothing is plugged in headphone jack, front left/right sound works normaly from built-in speakers
working 5.1 sound
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