[Alsa-user] snd-hda-intel AD1986A

[Marcel H. <ma...@bl...>]

Hello ,

I have some problems with the soundcard integrated in my laptop. Its a
Samsung M50 and according to alsamixer and the laptops documentation it
is based on a "Analog Devices AD1986A". I have a gentoo 2.6.14-r2
kernel, alsa v1.0.10.
If I try to play  a sound file,  the left speaker  only produces a very
high tone, while the right one seems to work fine. But if I touch any
mixer setting, sound stops working completely until I removed and
reloaded the alsa driver modules into the kernel. Also pausing the
playback of any file makes sound stop working. Same problems with
"speaker-test -Dplug:front -c2".
But if I try multichannel sound, like "speaker-test -Dplug:surround51
-c6" the left and right speaker work fine, i am able to adjust the
volume with alsamixer and can start and stop speaker-test without
breaking sound. Same with all other channel "-cx" settings except "-c2" ...
I have already tried to use position_fix=1 or 2, seems to reduce
distortion, but does not help with the main problem.
It also does not work with knoppix 4.0 for example, although its loading
the (hopefully) right modules, snd-hda-intel...

So, anyone any idea? :)


Marcel


lspci -vv

0000:00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6
Family) High Definition Audio Controller (rev 03)
        Subsystem: Samsung Electronics Co Ltd: Unknown device c01e
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0, cache line size 08
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at 80000000 (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 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [60] Message Signalled Interrupts: 64bit+
Queue=0/0 Enable-
                Address: 0000000000000000  Data: 0000
        Capabilities: [70] #10 [0091]