[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:              01-06-2006 19:22 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!
======================================================================

----------------------------------------------------------------------
 adel - 01-06-06 18:14 
----------------------------------------------------------------------
Hi,

I would like to confirm this bug on my ASUS A7N-VM CSM
with SoundMax ADI AD1986A 5.1 integrated with the motherboard.
I'm using Ubuntu Breezu, with kernel 2.6.14 .

The system make a horrible noise (trying to play de gdm "welcome" sound)
and after the sound driver seems to crash. However there is no messages in
/var/log/messages or dmesg. But the modules are still loaded :

snd_hda_intel snd_hda_codec snd_pcm_oss snd_mixer_oss, snd_pcm and
snd_timer

I applied successfully the patch :
http://www.nabble.com/Intel-HDA-AD1986A-without-surround-t595968.html
on alsa-driver-1.0.10.

Now the sound seems stable with some litte strange noise (perhaps my
speakers). 

this is the lspci -nvv :
0000:00:10.1 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 5
        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] #08 [a802]

----------------------------------------------------------------------
 kees - 01-06-06 19:22 
----------------------------------------------------------------------
adel:

If what you're hearing sounds like static, I found notes here:
http://lists.us.dell.com/pipermail/linux-precision/2005-September/000687.html

Adding this to my modules.conf file fixed the problem:

options snd-hda-intel position_fix=1

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                          
12-31-05 17:30 Dr Hotdog      Note Edited: 0007357                         
01-04-06 17:40 tiwai          Note Added: 0007446                          
01-04-06 17:56 kees           Note Added: 0007449                          
01-06-06 18:14 adel           Note Added: 0007490                          
01-06-06 19:22 kees           Note Added: 0007494                          
======================================================================




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