[Asus U41SV, Realtek ALC269VB, Mic, Internal] Inverted internal mic

No sound unless recording is panned hard left

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: alsa-base 1.0.25+dfsg-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: juergen 1785 F.... pulseaudio
 /dev/snd/pcmC0D0c: juergen 1785 F...m pulseaudio
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xdf000000 irq 49'
   Mixer name : 'Intel CougarPoint HDMI'
   Components : 'HDA:10ec0269,10431b13,00100100 HDA:80862805,80860101,00100000'
   Controls : 27
   Simple ctrls : 12
Date: Thu May 10 01:20:12 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_Type: High background noise, or volume is too low
Title: [U41SV, Realtek ALC269VB, Mic, Internal] Background noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2011
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: U41SV.209
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: U41SV
dmi.board.vendor: ASUSTeK Computer Inc.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrU41SV.209:bd03/31/2011:svnASUSTeKComputerInc.:pnU41SV:pvr1.0:rvnASUSTeKComputerInc.:rnU41SV:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0:
dmi.product.name: U41SV
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
mtime.conffile..etc.modprobe.d.alsa.base.conf: 2012-05-08T10:03:00.248443