Public bug reported:

system: 201206-11418, Dell Inspiron 14s.
This bug happens sometimes.
the kernel dump is as the attached image.
--- 
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Generic [HD-Audio Generic], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Generic [HD-Audio Generic], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  ubuntu     3921 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Generic'/'HD-Audio Generic at 0xfeb40000 irq 16'
   Mixer name   : 'Conexant CX20590'
   Components   : 'HDA:14f1506e,10280561,00100003'
   Controls      : 18
   Simple ctrls  : 10
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=05810cd3-8bde-4098-a905-30b997efa306
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
MachineType: Dell Inc. Inspiron 5425
Package: linux (not installed)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB:
 
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic 
root=UUID=dfb43133-7b2b-4576-abdf-bea3591e05dc ro recovery nomodeset
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
PulseList:
 Error: command ['pacmd', 'list'] failed with exit code 1: Home directory 
/home/ubuntu not ours.
 No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-29-generic N/A
 linux-backports-modules-3.2.0-29-generic  N/A
 linux-firmware                            1.79
StagingDrivers: rts5139
Tags:  precise staging
Uname: Linux 3.2.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
 
dmi.bios.date: 12/18/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: Q78
dmi.board.name: Inspiron 5425
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: 
dmi:bvnDellInc.:bvrQ78:bd12/18/2012:svnDellInc.:pnInspiron5425:pvrNotSpecified:rvnDellInc.:rnInspiron5425:rvrA02:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 5425
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.

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


** Tags: apport-collected blocks-hwcert precise staging

** Attachment added: "dump.jpg"
   https://bugs.launchpad.net/bugs/1097180/+attachment/3476709/+files/dump.jpg

** Tags added: apport-collected precise staging

** Description changed:

  system: 201206-11418, Dell Inspiron 14s.
  This bug happens sometimes.
  the kernel dump is as the attached image.
+ --- 
+ AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
+ AplayDevices:
+  **** List of PLAYBACK Hardware Devices ****
+  card 0: Generic [HD-Audio Generic], device 0: CONEXANT Analog [CONEXANT 
Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ ApportVersion: 2.0.1-0ubuntu12
+ Architecture: amd64
+ ArecordDevices:
+  **** List of CAPTURE Hardware Devices ****
+  card 0: Generic [HD-Audio Generic], device 0: CONEXANT Analog [CONEXANT 
Analog]
+    Subdevices: 1/1
+    Subdevice #0: subdevice #0
+ AudioDevicesInUse:
+  USER        PID ACCESS COMMAND
+  /dev/snd/controlC0:  ubuntu     3921 F.... pulseaudio
+ Card0.Amixer.info:
+  Card hw:0 'Generic'/'HD-Audio Generic at 0xfeb40000 irq 16'
+    Mixer name : 'Conexant CX20590'
+    Components : 'HDA:14f1506e,10280561,00100003'
+    Controls      : 18
+    Simple ctrls  : 10
+ DistroRelease: Ubuntu 12.04
+ HibernationDevice: RESUME=UUID=05810cd3-8bde-4098-a905-30b997efa306
+ InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
+ MachineType: Dell Inc. Inspiron 5425
+ Package: linux (not installed)
+ ProcEnviron:
+  TERM=xterm
+  PATH=(custom, no user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ ProcFB:
+  
+ ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-29-generic 
root=UUID=dfb43133-7b2b-4576-abdf-bea3591e05dc ro recovery nomodeset
+ ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
+ PulseList:
+  Error: command ['pacmd', 'list'] failed with exit code 1: Home directory 
/home/ubuntu not ours.
+  No PulseAudio daemon running, or not running as session daemon.
+ RelatedPackageVersions:
+  linux-restricted-modules-3.2.0-29-generic N/A
+  linux-backports-modules-3.2.0-29-generic  N/A
+  linux-firmware                            1.79
+ StagingDrivers: rts5139
+ Tags:  precise staging
+ Uname: Linux 3.2.0-29-generic x86_64
+ UpgradeStatus: No upgrade log present (probably fresh install)
+ UserGroups:
+  
+ dmi.bios.date: 12/18/2012
+ dmi.bios.vendor: Dell Inc.
+ dmi.bios.version: Q78
+ dmi.board.name: Inspiron 5425
+ dmi.board.vendor: Dell Inc.
+ dmi.board.version: A02
+ dmi.chassis.type: 8
+ dmi.chassis.vendor: Dell Inc.
+ dmi.chassis.version: Not Specified
+ dmi.modalias: 
dmi:bvnDellInc.:bvrQ78:bd12/18/2012:svnDellInc.:pnInspiron5425:pvrNotSpecified:rvnDellInc.:rnInspiron5425:rvrA02:cvnDellInc.:ct8:cvrNotSpecified:
+ dmi.product.name: Inspiron 5425
+ dmi.product.version: Not Specified
+ dmi.sys.vendor: Dell Inc.

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https://bugs.launchpad.net/bugs/1097180

Title:
  kernel crashes after dump

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