Public bug reported:
I had finished doing some work in a chroot, had exited it, and issued
the command "umount -a", rather than individually umount each of the
mounted elements. That killed X completely and gave a screenful of error
messages. I was able to reboot using the alt-sysrq REISUB sequence.
If this is an illegal command in the circumstances, I would have
expected to get a warning of some kind, or have the command blocked
altogether.
The machine is an EeePC 900, and the system is a fully-updated version
of 12.04 (non-pae kernel) running gnome-fallback.
ProblemType: KernelOops
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-18-generic 3.2.0-18.28
ProcVersionSignature: Ubuntu 3.2.0-18.28-generic 3.2.9
Uname: Linux 3.2.0-18-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
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: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 1.94-0ubuntu1
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ja 1618 F.... pulseaudio
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not
found.
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf7eb8000 irq 44'
Mixer name : 'Realtek ALC662 rev1'
Components : 'HDA:10ec0662,10438337,00100101'
Controls : 20
Simple ctrls : 11
CurrentDmesg:
Date: Wed Mar 7 07:57:54 2012
Failure: oops
HibernationDevice: RESUME=UUID=f1a0537c-5454-47d0-be4b-44c916978365
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111011)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
MachineType: ASUSTeK Computer INC. 900
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic
root=UUID=f1b69783-76f9-4736-a5d1-38b520d82063 ro quiet splash
PulseSinks: Error: command ['pacmd', 'list-sinks'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
PulseSources: Error: command ['pacmd', 'list-sources'] failed with exit code 1:
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-1ubuntu18
RfKill:
0: eeepc-wlan: Wireless LAN
Soft blocked: yes
Hard blocked: no
SourcePackage: linux
Title: BUG: unable to handle kernel NULL pointer dereference at 0000009c
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/03/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1006
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 900
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.:bvr1006:bd03/03/2009:svnASUSTeKComputerINC.:pn900:pvr0405:rvnASUSTeKComputerINC.:rn900:rvrx.xx:cvnASUSTekComputerINC.:ct10:cvrx.x:
dmi.product.name: 900
dmi.product.version: 0405
dmi.sys.vendor: ASUSTeK Computer INC.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-kerneloops i386 kernel-oops precise
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https://bugs.launchpad.net/bugs/948308
Title:
BUG: unable to handle kernel NULL pointer dereference at 0000009c
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