Hi,
I've just built a new amd64 system with an Abit KN9S motherboard. It
includes the following HDA chip on nforce5:
00:06.1 Audio device [0403]: nVidia Corporation MCP55 High Definition
Audio [10de:0371] (rev a2)
Subsystem: ABIT Computer Corp. Unknown device [147b:1c20]
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 1274
Memory at fe024000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+
Queue=0/0 Enable+
Capabilities: [6c] HyperTransport: MSI Mapping
I am running 2.6.23-rc5-git1
The motherboard supports a 7.1 surround system, I'm using a 4.1 speaker
system.
There are 6 audio I/O ports on the board: Surround, Center/Sub, Rear,
Line In, Line Out, Mic
Does this mean that it is a '6 stack' setup? (just curious what the
'stack' terminology means)
Here are the probe messages:
ACPI: PCI Interrupt 0000:00:06.1[B] -> Link [AAZA] -> GSI 22 (level,
low) -> IRQ 22
PCI: Setting latency timer of device 0000:00:06.1 to 64
ALSA sound/pci/hda/hda_intel.c:695: codec_mask = 0x1
hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
ALSA sound/pci/hda/hda_codec.c:2331: autoconfig: line_outs=4
(0x14/0x15/0x16/0x17/0x0)
ALSA sound/pci/hda/hda_codec.c:2335: speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2339: hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
ALSA sound/pci/hda/hda_codec.c:2347: inputs: mic=0x18, fmic=0x19,
line=0x1a, fline=0x0, cd=0x1c, aux=0x0
My 4.1 system has 2 plugs: one for rear, one for front. I plugged front
into Line Out and rear into Rear.
I'm trying to get surround working with this setup. I raise all mixers
in alsamixer and then I run:
speaker-test -c 4
and it cycles through all 4 channels:
For "front left", I hear the pink noise in both the front left and rear
left speakers
For "front right", I hear the pink noise in both the front right and
rear right speakers
For "rear left" and "rear right", I hear nothing.
In other words, it seems to be running like a 2.1 system with 4 speakers
where the front and rear speakers on each side mirror each other. I can
tweak the volume balance between front and rear with the "Front" and
"Surround" mixers in alsamixer.
Am I doing anything wrong? How can I go about solving this so that the
computer can specifically play audio out of the rear speakers?
Here is the amixer output:
> Simple mixer control 'Headphone',0
> Capabilities: pswitch
> Playback channels: Front Left - Front Right
> Mono:
> Front Left: Playback [off]
> Front Right: Playback [off]
> Simple mixer control 'PCM',0
> Capabilities: pvolume
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 255
> Mono:
> Front Left: Playback 255 [100%] [0.00dB]
> Front Right: Playback 255 [100%] [0.00dB]
> Simple mixer control 'Front',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 31 [100%] [0.00dB] [on]
> Front Right: Playback 31 [100%] [0.00dB] [on]
> Simple mixer control 'Front Mic',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 0 [0%] [-34.50dB] [on]
> Front Right: Playback 0 [0%] [-34.50dB] [on]
> Simple mixer control 'Surround',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 26 [84%] [-7.50dB] [on]
> Front Right: Playback 26 [84%] [-7.50dB] [on]
> Simple mixer control 'Center',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined
> Playback channels: Mono
> Limits: Playback 0 - 31
> Mono: Playback 0 [0%] [-46.50dB] [on]
> Simple mixer control 'LFE',0
> Capabilities: pvolume pvolume-joined pswitch pswitch-joined
> Playback channels: Mono
> Limits: Playback 0 - 31
> Mono: Playback 0 [0%] [-46.50dB] [on]
> Simple mixer control 'Side',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 0 [0%] [-46.50dB] [on]
> Front Right: Playback 0 [0%] [-46.50dB] [on]
> Simple mixer control 'Line',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 0 [0%] [-34.50dB] [on]
> Front Right: Playback 0 [0%] [-34.50dB] [on]
> Simple mixer control 'CD',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 0 [0%] [-34.50dB] [on]
> Front Right: Playback 0 [0%] [-34.50dB] [on]
> Simple mixer control 'Mic',0
> Capabilities: pvolume pswitch
> Playback channels: Front Left - Front Right
> Limits: Playback 0 - 31
> Mono:
> Front Left: Playback 0 [0%] [-34.50dB] [on]
> Front Right: Playback 0 [0%] [-34.50dB] [on]
> Simple mixer control 'Capture',0
> Capabilities: cvolume cswitch
> Capture channels: Front Left - Front Right
> Limits: Capture 0 - 31
> Front Left: Capture 0 [0%] [-12.00dB] [on]
> Front Right: Capture 0 [0%] [-12.00dB] [on]
> Simple mixer control 'Capture',1
> Capabilities: cvolume cswitch
> Capture channels: Front Left - Front Right
> Limits: Capture 0 - 31
> Front Left: Capture 0 [0%] [-12.00dB] [on]
> Front Right: Capture 0 [0%] [-12.00dB] [on]
> Simple mixer control 'Input Source',0
> Capabilities: enum
> Items: 'Mic' 'Front Mic' 'Line' 'CD'
> Item0: 'Mic'
> Simple mixer control 'Input Source',1
> Capabilities: enum
> Items: 'Mic' 'Front Mic' 'Line' 'CD'
> Item0: 'Mic'
Another unrelated question: what is the "Headphone" control for? It
doesn't seem to make any difference to anything.
Apart from the surround issues and my own curiosity, the setup is
working nicely and even works with MSI :)
Daniel
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