ACPI Exception: AE_NOT_FOUND Evaluating _PRW

natty i386 updated

get this error logged: ACPI Exception: AE_NOT_FOUND Evaluating _PRW

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.37-12-generic-pae 2.6.37-12.26
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.37-12.26-generic-pae 2.6.37
Uname: Linux 2.6.37-12-generic-pae i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: oem 2656 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfebfc000 irq 43'
   Mixer name : 'Realtek ALC882'
   Components : 'HDA:10ec0882,1043e601,00100101'
   Controls : 44
   Simple ctrls : 25
Date: Fri Jan 7 10:25:48 2011
HibernationDevice: RESUME=UUID=0a9ca7f0-6eeb-4b21-b70f-670fa600de16
MachineType: ASUSTEK COMPUTER INC P5W DH Deluxe
ProcEnviron:
 LANGUAGE=fr_FR:fr:en_GB:en
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 LC_MESSAGES=fr_FR.utf8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.37-12-generic-pae root=UUID=9e61e83e-bca9-43cf-aa90-5a68892213fa ro vga=791 vt.handoff=7 crashkernel=384M-2G:64M,2G-:128M quiet splash
RelatedPackageVersions:
 linux-restricted-modules-2.6.37-12-generic-pae N/A
 linux-backports-modules-2.6.37-12-generic-pae N/A
 linux-firmware 1.45
RfKill:

SourcePackage: linux
WifiSyslog:

WpaSupplicantLog:

dmi.bios.date: 10/22/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3001
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5W DH Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3001:bd10/22/2009:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5W DH Deluxe
dmi.product.version: System Version
dmi.sys.vendor: ASUSTEK COMPUTER INC