BUG: unable to handle kernel NULL pointer dereference at 000001e0

[Chris]

The system was idle and on charge. After many hours I came back and found the screen had been powered down (black) and use the touchpad to wake the screen up. The screen came on and was at a console (full screen text) with some error message which were only there for half a second before it when back to an X screen with a apport, however the system stopped responding to mouse input immediately, and the mouse pointer disappeared. The system would not respond to ctrl-alt-F1 to get back to the console. I had no indication that the system was working at all. Pressing ctrl-alt-del caused the machine to shutdown and reboot after which apport offered this bug report.

ProblemType: KernelOops
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-7-generic 2.6.38-7.39
Regression: No
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic 2.6.38
Uname: Linux 2.6.38-7-generic 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: chris 1167 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf3eb8000 irq 44'
   Mixer name : 'Realtek ALC269'
   Components : 'HDA:10ec0269,10438330,00100004'
   Controls : 11
   Simple ctrls : 7
Date: Sun Apr 3 07:38:11 2011
Failure: oops
Frequency: Once a day.
HibernationDevice: RESUME=UUID=1c72309f-461c-4814-afc2-b0b1c95bd55c
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Beta i386 (20110330)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 ppp0 no wireless extensions.
MachineType: ASUSTeK Computer INC. 900SD
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-7-generic root=UUID=a2593d86-4042-4fa0-b33b-3dac47c791c7 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-7-generic N/A
 linux-backports-modules-2.6.38-7-generic N/A
 linux-firmware 1.49
SourcePackage: linux
Title: BUG: unable to handle kernel NULL pointer dereference at 000001e0
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/05/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0503
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 900SD
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.:bvr0503:bd03/05/2009:svnASUSTeKComputerINC.:pn900SD:pvr0503:rvnASUSTeKComputerINC.:rn900SD:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 900SD
dmi.product.version: 0503
dmi.sys.vendor: ASUSTeK Computer INC.