Public bug reported:

Running natty classic with compiz. Browsing around with Firefox and
clicking X on a tab with an image. I was expecting to see the next tab,
instead I have a text console full of error messages and the system
doesn't respond to anything.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: CS46xx [Sound Fusion CS46xx], device 0: CS46xx [CS46xx]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  kaja       2034 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not 
found.
Card0.Amixer.info:
 Card hw:0 'CS46xx'/'Sound Fusion CS46xx at 0xf7fff000/0xf7e00000, irq 16'
   Mixer name   : 'Cirrus Logic CS4297A rev 4,Cirrus Logic CS4294 rev 5'
   Components   : 'AC97a:43525914 AC97a:4352592d'
   Controls      : 71
   Simple ctrls  : 45
Date: Wed May  4 23:09:27 2011
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=e654c3d3-e459-44f9-b060-316b080982f9
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
 
 vboxnet0  no wireless extensions.
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=fi_FI:en
 LANG=fi_FI.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic 
root=UUID=69e9cf3f-a517-4591-934b-1d358248b297 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-2.6.38-8-generic N/A
 linux-backports-modules-2.6.38-8-generic  N/A
 linux-firmware                            1.52
RfKill:
 
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-04-29 (5 days ago)
UserAsoundrc: pcm.dsp0 {      type plug      slave.pcm "hw:0,0" }
dmi.bios.date: 07/22/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1604
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P7H55-M PRO
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1604:bd07/22/2010:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP7H55-MPRO:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

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https://bugs.launchpad.net/bugs/777404

Title:
  Closing tab in Firefox triggers kernel BUG: unable to handle kernel
  paging request at 000000000007a86c

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