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

when upgraded to 11.4 alfa and when the pc starts it shows this message.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic-pae 2.6.38-7.39
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic-pae 2.6.38
Uname: Linux 2.6.38-7-generic-pae i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: zafer 1303 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf9ffc000 irq 43'
   Mixer name : 'Realtek ALC888'
   Components : 'HDA:10ec0888,14627392,00100001'
   Controls : 33
   Simple ctrls : 19
Date: Fri Apr 1 00:18:22 2011
Failure: oops
HibernationDevice: RESUME=UUID=0b2e554f-d205-48cb-889c-0602fab954b1
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: MICRO-STAR INTERNATIONAL CO.,LTD MS-7392
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic-pae root=UUID=e413e184-2ae4-4448-bdc7-32c036e7fb79 ro vga=789 quiet quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic-pae N/A
 linux-backports-modules-2.6.38-7-generic-pae N/A
 linux-firmware 1.49
RfKill:

SourcePackage: linux
Title: WARNING: at /build/buildd/linux-2.6.38/net/sched/sch_generic.c:256 dev_watchdog+0x213/0x220()
UpgradeStatus: Upgraded to natty on 2011-03-31 (0 days ago)
dmi.bios.date: 07/03/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V1.5
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: MS-7392
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV1.5:bd07/03/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7392:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7392:rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: MS-7392
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD