This is like many others, a very old bug and it is still unsolved, although it is very easy to reproduce it. I am a young linux user, but I could see it in Natty, Oneiric and now I tested it in Precise, both with the standard kernel and the latest RC.
uname -a
Linux florin-Satellite-C650 3.4.0-030400rc5-generic #201205011817 SMP Tue May 1 22:18:19 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
How to reproduce it:
1. Click the Network icon on top bar
2. Go to Disable network and press it
See the system hangs up for half a minute or more. Nothing moves, not even the mouse pointer.
Exactly the same when you Enable Network from that place.
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: florin 1787 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd6400000 irq 43'
Mixer name : 'Conexant CX20585'
Components : 'HDA:14f15069,1179fde2,00100302'
Controls : 8
Simple ctrls : 5
DistroRelease: Ubuntu 12.04
HibernationDevice: RESUME=UUID=7352ae09-637f-484f-9d39-2164fed542cc
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 004: ID 10f1:1a2a Importek
MachineType: TOSHIBA Satellite C650
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=783a052b-6e04-40de-8285-da77271a129f ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
StagingDrivers: mei
Tags: precise staging precise staging
Uname: Linux 3.2.0-24-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo vboxusers
dmi.bios.date: 03/16/2011
dmi.bios.vendor: INSYDE
dmi.bios.version: 1.90
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvr1.90:bd03/16/2011:svnTOSHIBA:pnSatelliteC650:pvrPSC14E-00400MG5:rvnTOSHIBA:rnPortablePC:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.name: Satellite C650
dmi.product.version: PSC14E-00400MG5
dmi.sys.vendor: TOSHIBA
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 994920
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.