kernel oops

I don't Know

ProblemType: KernelOops
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: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: maria 1605 F.... pulseaudio
CRDA: Error: [Errno 2] No existe el fichero ó directorio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xe4624000 irq 16'
   Mixer name : 'Analog Devices AD1981'
   Components : 'HDA:11d41981,103c30d8,00100200 HDA:11c11040,103c1378,00100200'
   Controls : 11
   Simple ctrls : 9
Date: Sun Feb 28 19:57:27 2010
DistroRelease: Ubuntu 9.10
Failure: oops
HibernationDevice: RESUME=UUID=f8611e51-bc6a-40a6-8f5b-40a7a7b66660
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.
MachineType: Hewlett-Packard HP Compaq 6720s
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=UUID=84786d4d-13e9-4330-bd39-757bb35a2dfc 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:

SourcePackage: linux
Tags: kernel-oops
Title: WARNING: at /build/buildd/linux-2.6.31/fs/buffer.c:1152 mark_buffer_dirty+0x70/0x90()
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 01/10/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68MDU Ver. F.09
dmi.board.name: 30D8
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 83.0E
dmi.chassis.asset.tag: CNU806220S
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68MDUVer.F.09:bd01/10/2008:svnHewlett-Packard:pnHPCompaq6720s:pvrF.09:rvnHewlett-Packard:rn30D8:rvrKBCVersion83.0E:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq 6720s
dmi.product.version: F.09
dmi.sys.vendor: Hewlett-Packard