BUG: unable to handle kernel NULL pointer dereference at 0000011c

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I can't understand.

ProblemType: KernelOops
Annotation: Your system might become unstable now and might need to be restarted.
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: x-clusive 2758 F.... pulseaudio
 /dev/snd/pcmC0D0p: x-clusive 2758 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd6700000 irq 22'
   Mixer name : 'Intel G45 DEVCTG'
   Components : 'HDA:10ec0888,10250260,00100202 HDA:11c11040,10250260,00100200 HDA:80862802,80860101,00100000'
   Controls : 29
   Simple ctrls : 15
Date: Sun May 30 06:44:41 2010
DistroRelease: Ubuntu 9.10
Failure: oops
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: Acer Aspire 4736Z
Package: linux-image-2.6.31-14-generic 2.6.31-14.48
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-14-generic root=/dev/sda2 loop=/hostname/disks/root.disk 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: BUG: unable to handle kernel NULL pointer dereference at 0000011c
Uname: Linux 2.6.31-14-generic i686
dmi.bios.date: 01/18/2010
dmi.bios.vendor: Acer
dmi.bios.version: V2.08
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 4736Z
dmi.board.vendor: Acer
dmi.board.version: V2.08
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.08
dmi.modalias: dmi:bvnAcer:bvrV2.08:bd01/18/2010:svnAcer:pnAspire4736Z:pvrV2.08:rvnAcer:rnAspire4736Z:rvrV2.08:cvnAcer:ct10:cvrV2.08:
dmi.product.name: Aspire 4736Z
dmi.product.version: V2.08
dmi.sys.vendor: Acer