[alsa-devel] Strange sound of IDT 82hd206xx6 at font port in AC97 mode

[Takashi Iwai]

At Mon, 3 Feb 2014 15:01:00 +0800,
Randy Li wrote:
> 
> 
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> Hello
> My mainboard is ECS A780GM-A, the sound chip in it is IDT 82HD206XX6, it
> shows that below
> 00:14.2 Audio device: Advanced Micro Devices [AMD] nee ATI SBx00 Azalia
> (Intel HDA)
>         Subsystem: Elitegroup Computer Systems Device 2816
>         Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
> ParErr- Stepping- SERR- FastB2B- DisINTx-
>         Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=slow >TAbort-
> <TAbort- <MAbort- >SERR- <PERR- INTx-
>         Latency: 64, Cache Line Size: 64 bytes
>         Interrupt: pin A routed to IRQ 16
>         Region 0: Memory at f9ff0000 (64-bit, non-prefetchable) [size=16K]
>         Capabilities: [50] Power Management version 2
>                 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA
> PME(D0+,D1-,D2-,D3hot+,D3cold+)
>                 Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
>         Kernel driver in use: snd_hda_intel
> 
> In my bios I don't have a switch to make the font port mode into AC97 or
> HD Audio.
> In windows you need to install a driver and set the font port into AC97.

HD-audio front panel should be connected in HD-audio mode.  Otherwise
something must go wrong.

> In Linux, you can use the font port, but it seems that audio channel is
> wrong, I can't hear the sound in some part of a film and I can hear the
> stranger accent of sound in the other part of a film(or a music). But
> all the 7.1 channel in the back ports can output the sound match my
> mircophone(all are the same).
> How to fix the problem?

You need to switch to HD-audio mode, at first.


Takashi

> Kernel is 3.4.77
> 
> 
> ayaka
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