Comment 0 for bug 867811

I have an external NTFS disk connected via USB, and when I safely remove the disk (using "Safely remove" on the dash) the system freezes completely.
Alt+sysrq+b does nothing. And after a hard restart, I get no crash report telling me that the system crashed.

If I choose to unmount the disk instead of safely remove it, or if I mount and unmount it manually using the terminal, the system does not crash.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-3.0.0-12-generic 3.0.0-12.19
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu2
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC888 Analog [ALC888 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: niclas 2319 F.... pulseaudio
 /dev/snd/controlC0: niclas 2319 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0400000 irq 46'
   Mixer name : 'Realtek ALC888'
   Components : 'HDA:10ec0888,1025021e,00100202 HDA:11c11040,1025021e,00100200'
   Controls : 23
   Simple ctrls : 13
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16'
   Mixer name : 'Nvidia GPU 0a HDMI/DP'
   Components : 'HDA:10de000a,10de0101,00100100'
   Controls : 16
   Simple ctrls : 4
Date: Tue Oct 4 21:11:57 2011
HibernationDevice: RESUME=UUID=7ca1f62e-c857-43f5-8daa-bd0db599f86a
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110817)
MachineType: Acer Aspire 5739G
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=4ec53029-e289-43ef-9184-22d5c03447cd ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-12-generic N/A
 linux-backports-modules-3.0.0-12-generic N/A
 linux-firmware 1.60
SourcePackage: linux
UpgradeStatus: Upgraded to oneiric on 2011-09-28 (6 days ago)
dmi.bios.date: 12/21/2009
dmi.bios.vendor: Phoenix
dmi.bios.version: V1.3311
dmi.board.name: JM50-MV
dmi.board.vendor: Acer
dmi.board.version: Not Applicable
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenix:bvrV1.3311:bd12/21/2009:svnAcer:pnAspire5739G:pvrNotApplicable:rvnAcer:rnJM50-MV:rvrNotApplicable:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5739G
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer