WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x2a0/0x2b0()

I get message about this problem after computer boot.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC670 Analog [ALC670 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
CRDA: Error: [Errno 2] Нет такого файла или каталога
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf8600000 irq 48'
   Mixer name : 'Realtek ALC670'
   Components : 'HDA:10ec0670,1025038b,00100002'
   Controls : 25
   Simple ctrls : 14
Card1.Amixer.info:
 Card hw:1 'Generic'/'HD-Audio Generic at 0xf8120000 irq 49'
   Mixer name : 'ATI R6xx HDMI'
   Components : 'HDA:1002aa01,00aa0100,00100200'
   Controls : 4
   Simple ctrls : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Sat Mar 26 13:19:26 2011
Failure: oops
Frequency: Once a day.
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110112)
MachineType: Acer Aspire 8943G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=7db35ee7-8249-4d7b-9a90-5fc89702c444 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic N/A
 linux-backports-modules-2.6.38-7-generic N/A
 linux-firmware 1.49
SourcePackage: linux
Title: WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x2a0/0x2b0()
UpgradeStatus: Upgraded to natty on 2011-01-31 (55 days ago)
WifiSyslog: Mar 28 09:04:17 CVOLaptop1 kernel: [ 410.249185] atl1c 0000:02:00.0: vpd r/w failed. This is likely a firmware bug on this device. Contact the card vendor for a firmware update.
dmi.bios.date: 08/11/2010
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.06
dmi.board.name: SM83-CP
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenix:bvrV1.06:bd08/11/2010:svnAcer:pnAspire8943G:pvrNotApplicable:rvnAcer:rnSM83-CP:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 8943G
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer