Speakers AND headphones playing sound simultaneously

Hi all,
I just noticed today that when I plug in my headphones, I still hear sound 
through my PC speakers.
I'm on an PC, running Mint 10 and I use rhythmbox as my media player.


lspci -vvnn produced00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 
Azalia (Intel HDA) [1002:4383]Subsystem: ASUSTeK Computer Inc. Device 
[1043:8357]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 bytesInterrupt: pin ? routed to IRQ 16Region 0: Memory at 
fbdf8000 (64-bit, non-prefetchable) [size=16K]Capabilities: <access 
denied>Kernel driver in use: HDA IntelKernel modules: snd-hda-intel

cat /proc/asound/pcm 00-00: AD198x Analog : AD198x Analog : playback 1 : 
capture 300-01: AD198x Digital : AD198x Digital : playback 1 : capture 101-00: 
USB Audio : USB Audio : capture 102-03: ATI HDMI : ATI HDMI : playback 1

cat /proc/asound/modules 0 snd_hda_intel1 snd_usb_audio2 snd_hda_intel

cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 
1.0.23.


add /etc/modprobe.d/alsa-base.conf <-----> options snd-hda-intel index=0 
model=6stack-dig 



 http://www.kernel.org/doc/Documentation/sound/alsa/HD-Audio-Models.txt


AD1988/AD1988B/AD1989A/AD1989B==============================6stack      6-jack 
------------------------------------------------------tested6stack-dig   ditto 
with SPDIF-----------------------------------tested3stack 
3-jack------------------------------------------------------tested3stack-dig    
ditto with SPDIF-----------------------------------testedlaptop 3-jack with 
hp-jack automute-------------------------testedlaptop-dig   ditto with 
SPDIF-----------------------------------testedauto    auto-config reading BIOS 
(default)-------------tested

My mobo is Crosshair III Formula...

SupremeFX X-Fi Audio Card 8 -Channel High Definition Audio CODEC - EAX® 
Advanced™ HD 4.0 - X-Fi CMSS®-3D - X-Fi Crystalizer™ - Creative ALchemy - 
Supports 1 x S/PDIF out header - Supports Coaxial/Optical S/PDIF out ports on 
rear

Thanks!

 
                                          
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