>[10487.008163] WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()

Started happening after Natty updates on March 11, 2011. Occurs after login, desktop shows up & terminal application is launched.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-6-generic-pae 2.6.38-6.34
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-6.34-generic-pae 2.6.38-rc7
Uname: Linux 2.6.38-6-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: marjomercado 1388 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfbcb8000 irq 45'
   Mixer name : 'Realtek ALC269'
   Components : 'HDA:10ec0269,1043834a,00100004'
   Controls : 10
   Simple ctrls : 6
Date: Fri Mar 11 15:04:30 2011
Failure: oops
Frequency: Once a day.
HibernationDevice: RESUME=UUID=175c6736-c8c1-45f5-bd47-0d7b33415a29
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20101202)
MachineType: ASUSTeK Computer INC. 1008HA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-6-generic-pae root=UUID=7a480c2c-0ce9-4645-98af-9a8b43e84f1e ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-6-generic-pae N/A
 linux-backports-modules-2.6.38-6-generic-pae N/A
 linux-firmware 1.48
SourcePackage: linux
Title: >[10487.008163] WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()
UpgradeStatus: Upgraded to natty on 2011-03-01 (10 days ago)
dmi.bios.date: 04/27/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0302
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1008HA
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0302:bd04/27/2009:svnASUSTeKComputerINC.:pn1008HA:pvrx.x:rvnASUSTeKComputerINC.:rn1008HA:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1008HA
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.