WARNING: at /build/buildd/linux-2.6.31/net/sched/sch_generic.c:246 dev_watchdog+0x1f6/0x210()

This annotation appear after ii play videos on youtube with firefox default package installer.

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: SI7012 [SiS SI7012], device 0: Intel ICH [SiS SI7012]
   Subdevices: 0/1
   Subdevice #0: subdevice #0
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ikhlas-family 1558 F.... pulseaudio
 /dev/snd/pcmC0D0p: ikhlas-family 1558 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'SI7012'/'SiS SI7012 with ALC203 at irq 18'
   Mixer name : 'Realtek ALC203 rev 0'
   Components : 'AC97a:414c4770'
   Controls : 31
   Simple ctrls : 20
Date: Thu Dec 10 00:43:06 2009
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=UUID=d5371225-ab8e-403c-842b-613280adac8c
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Lsusb:
 Bus 002 Device 002: ID 15d9:0a33 Unknown
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Acer, inc. Aspire 3000
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=edee2067-2146-47db-a8c6-f15a069d65f0 ro quiet splash
ProcVersionSignature: Ubuntu 2.6.31-14.48-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-14-generic N/A
 linux-firmware 1.24
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Tags: kernel-oops
Title: WARNING: at /build/buildd/linux-2.6.31/net/sched/sch_generic.c:246 dev_watchdog+0x1f6/0x210()
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 06/16/05
dmi.bios.vendor: Acer
dmi.bios.version: 3A24
dmi.board.name: Lugano M
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: , Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAcer:bvr3A24:bd06/16/05:svnAcer,inc.:pnAspire3000:pvrNotApplicable:rvnAcer,Inc.:rnLuganoM:rvrNotApplicable:cvn,Inc.:ct1:cvrN/A:
dmi.product.name: Aspire 3000
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.