[ALSA - driver 0001678]: nForce (10de:026c) left channel squeals, right channel mostly okay

[bugtrack@alsa-project.org]

A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1678> 
======================================================================
Reported By:                kees
Assigned To:                tiwai
======================================================================
Project:                    ALSA - driver
Issue ID:                   1678
Category:                   PCI - hda-intel
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
Distribution:               Ubuntu Breezy
Kernel Version:             2.6.15-rc6-git4
======================================================================
Date Submitted:             12-25-2005 02:29 CET
Last Modified:              12-31-2005 17:12 CET
======================================================================
Summary:                    nForce (10de:026c) left channel squeals, right
channel mostly okay
Description: 
This is an integrated chipset on an ASUS A8N-VM-UAYGZ mobo.  Marketing info
is this is an "nForce410" board, with "6-channel HD audio".

Both the ALSA in 2.6.15-rc6-git4 and the 1.0.11rc1 ALSA driver for
snd-hda-intel load fine, but during playback, the left channel squeals,
while the right seems to play things okay.

I'm happy to dig around and try whatever needs trying to get this fixed. 
Thanks!
======================================================================

----------------------------------------------------------------------
 kees - 12-31-05 10:16 
----------------------------------------------------------------------
Confirmed.  My /proc/asound/card0/codec#0 matches:

$ head /proc/asound/card0/codec#0 
Codec: Analog Devices AD1986A
Address: 0
Vendor Id: 0x11d41986
Subsystem Id: 0x104381b3
Revision Id: 0x100400

Applying the patch fixes stereo sound -- I'm not interested in digital
surround yet, so I can wait.  THANK YOU morgoth666!  :)  I had found that
patch earlier, but couldn't re-locate later on.  :):)

----------------------------------------------------------------------
 Dr Hotdog - 12-31-05 17:12 
----------------------------------------------------------------------
I can confirm the problems with the ASUS A8N-VM CSM and its AD1986A sound
chip.  Kernel 2.6.15rc7 with ALSA 1.0.11rc1 hda-intel results in high
pitched squealing from the front left speaker whenever there is sound
being played over any channel.  Results of using speaker-test are the same
as those reported by kees for the ASUS A8N-VM-UAYGZ mobo.

lspci -nvv:

00:10.1 Class 0403: 10de:026c (rev a2)
        Subsystem: 10de:cb84
        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 (500ns min, 1250ns max)
        Interrupt: pin B routed to IRQ 233
        Region 0: Memory at febd8000 (32-bit, non-prefetchable)
[size=16K]
        Capabilities: [44] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [50] Message Signalled Interrupts: 64bit+ Queue=0/0
Enable-
                Address: 0000000000000000  Data: 0000
        Capabilities: [6c] HyperTransport: MSI Mapping

head /proc/asound/card0/code#0:

Codec: Analog Devices AD1986A
Address: 0
Vendor Id: 0x11d41986
Subsystem Id: 0x104381b3
Revision Id: 0x100400

Unfortunately I am interested in surround sound (this is a motherboard
designed with HTPC use in mind, stereo only output just doesn't cut it) so
the patch morgoth666 linked to is an incomplete solution at best.

Issue History
Date Modified  Username       Field                    Change              
======================================================================
12-25-05 02:29 kees           New Issue                                    
12-25-05 02:29 kees           Distribution              => Ubuntu Breezy   
12-25-05 02:29 kees           Kernel Version            => 2.6.15-rc6-git4 
12-26-05 11:02 kees           Note Added: 0007149                          
12-30-05 23:43 morgoth666     Issue Monitored: morgoth666                    
12-30-05 23:43 morgoth666     Issue End Monitor: morgoth666                    
12-30-05 23:44 morgoth666     Issue Monitored: morgoth666                    
12-30-05 23:50 morgoth666     Note Added: 0007300                          
12-31-05 05:47 Dr Hotdog      Issue Monitored: Dr Hotdog                    
12-31-05 10:16 kees           Note Added: 0007355                          
12-31-05 17:12 Dr Hotdog      Note Added: 0007357                          
======================================================================




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