Plug in external USB disk (single NTFS partition) --> go to nautilus --> right click on volume name under 'Devices' section --> left click safely remove drive. Screen freezes and system restarts after a few seconds. Reproduced almost every time.
In two occasions the system switched to terminal mode reporting "Kernel panic - not syncing: fatal exception in interrupt 3.0.0-12-generic...". However, I haven't been able to reproduce since.
Using "umount /dev/sdb1" in terminal (where 'sdb1' the USB disk) does not cause the reported problem. The specific external USB disk has been used in Maverick and Natty without issues.
Using another external USB disk (flash-based) and testing with both ext4 and NTFS partitions could not reproduce the problem.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: nautilus 1:3.2.0-0ubuntu5
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
Date: Tue Oct 11 14:17:52 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: nautilus
UpgradeStatus: Upgraded to oneiric on 2011-10-11 (0 days ago)
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: panos 1691 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf7f00000 irq 54'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d76d1,102804b0,00100205 HDA:80862805,80860101,00100000'
Controls : 18
Simple ctrls : 10
DistroRelease: Ubuntu 11.10
HibernationDevice: RESUME=UUID=6e47634f-df1a-4216-a380-9d991878abe6
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Dell Inc. Inspiron N5110
Package: linux (not installed)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=5897a153-57ff-45db-930b-6edd9fb25b3c ro crashkernel=384M-2G:64M,2G-:128M quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
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
StagingDrivers: mei
Tags: oneiric running-unity staging
Uname: Linux 3.0.0-12-generic x86_64
UpgradeStatus: Upgraded to oneiric on 2011-10-11 (8 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
dmi.bios.date: 09/14/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 034W60
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA08:bd09/14/2011:svnDellInc.:pnInspironN5110:pvrNotSpecified:rvnDellInc.:rn034W60:rvrA08:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron N5110
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
thank you for your bug report, but freeze, reboots and kernel panics are kernel issues not nautilus ones, whatever nautilus is doing the kernel should stay stable