Thanks for your mail Christopher.
No. This problem is not occurring anymore. Thanks for the solution.


Regards
Antony Raj.

On Mon, Apr 2, 2012 at 6:40 AM, Christopher M. Penalver
<email address hidden> wrote:
> Antony, thank you for reporting this and helping make Ubuntu better.
> This bug was reported a while ago and there hasn't been any activity in
> it recently. We were wondering if this is still an issue? Can you try
> with the latest development release of Ubuntu? ISO CD images are
> available from http://cdimage.ubuntu.com/releases/ .
>
> If it remains an issue, could you run the following command from a
> Terminal (Applications->Accessories->Terminal). It will automatically
> gather and attach updated debug information to this report.
>
> apport-collect -p linux <replace-with-bug-number>
>
> Also, if you could test the latest upstream kernel available that would
> be great. It will allow additional upstream developers to examine the
> issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once
> you've tested the upstream kernel, please remove the 'needs-upstream-
> testing' tag. This can be done by clicking on the yellow pencil icon
> next to the tag located at the bottom of the bug description and
> deleting the 'needs-upstream-testing' text. Please let us know your
> results.
>
> Thanks in advance.
>
> ** Tags added: needs-upstream-testing regression-release
>
> ** Changed in: linux (Ubuntu)
>       Status: Confirmed => Incomplete
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/863035
>
> Title:
>  after locking ubuntu for some time, ubuntu doesn't connect to network,
>  though it tries to
>
> Status in “linux” package in Ubuntu:
>  Incomplete
>
> Bug description:
>  I am used to locking my ubuntu. Recently I upgraded to Ubuntu 11.10 Beta 2 from Ubuntu 11.04. After upgradation, whenever I lock my ubuntu, It seems to loose network connection. After sometime when I unlock my ubuntu, it tries to connect to ethernet LAN. But it always fails. I am forced to reboot or some other command could help me.
>  Description:  Ubuntu oneiric (development branch)
>  Release:      11.10
>  ---
>  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
>  ApportVersion: 1.23-0ubuntu4
>  Architecture: i386
>  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:  antonyr    2224 F.... pulseaudio
>  Card0.Amixer.info:
>   Card hw:0 'PCH'/'HDA Intel PCH at 0xf7f00000 irq 49'
>     Mixer name : 'Intel CougarPoint HDMI'
>     Components : 'HDA:111d76d1,102804b3,00100205 HDA:80862805,80860101,00100000'
>     Controls      : 18
>     Simple ctrls  : 10
>  DistroRelease: Ubuntu 11.10
>  EcryptfsInUse: Yes
>  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
>  MachineType: Dell Inc. Vostro 3550
>  Package: linux (not installed)
>  ProcEnviron:
>   LANGUAGE=en_IN:en
>   PATH=(custom, user)
>   LANG=en_IN
>   SHELL=/bin/bash
>  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic-pae root=UUID=45a35412-e2fb-4e83-b6a5-1e3a0285ae90 ro quiet splash vt.handoff=7
>  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic-pae 3.0.6
>  RelatedPackageVersions:
>   linux-restricted-modules-3.0.0-13-generic-pae N/A
>   linux-backports-modules-3.0.0-13-generic-pae  N/A
>   linux-firmware                                1.60
>  StagingDrivers: mei
>  Tags:  oneiric running-unity staging
>  Uname: Linux 3.0.0-13-generic-pae i686
>  UpgradeStatus: No upgrade log present (probably fresh install)
>  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
>  WifiSyslog:
>   Dec 13 13:00:59 LT-NB-031B NetworkManager[1401]: <info> (wlan0): roamed from BSSID B4:99:BA:8F:B9:F8 (LT-Wi5-VL6) to B4:99:BA:8F:B9:F8 (LT-Wi5-VL6)
>   Dec 13 13:14:59 LT-NB-031B NetworkManager[1401]: <info> (wlan0): roamed from BSSID B4:99:BA:8F:B9:F8 (LT-Wi5-VL6) to B4:99:BA:8F:B9:F8 (LT-Wi5-VL6)
>   Dec 13 13:26:59 LT-NB-031B NetworkManager[1401]: <info> (wlan0): roamed from BSSID B4:99:BA:8F:B9:F8 (LT-Wi5-VL6) to B4:99:BA:8F:B9:F8 (LT-Wi5-VL6)
>   Dec 13 13:36:59 LT-NB-031B NetworkManager[1401]: <info> (wlan0): roamed from BSSID B4:99:BA:8F:B9:F8 (LT-Wi5-VL6) to B4:99:BA:8F:B9:F8 (LT-Wi5-VL6)
>  dmi.bios.date: 07/18/2011
>  dmi.bios.vendor: Dell Inc.
>  dmi.bios.version: A07
>  dmi.board.name: 0JK86R
>  dmi.board.vendor: Dell Inc.
>  dmi.board.version: A07
>  dmi.chassis.type: 8
>  dmi.chassis.vendor: Dell Inc.
>  dmi.chassis.version: Not Specified
>  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd07/18/2011:svnDellInc.:pnVostro3550:pvrNotSpecified:rvnDellInc.:rn0JK86R:rvrA07:cvnDellInc.:ct8:cvrNotSpecified:
>  dmi.product.name: Vostro 3550
>  dmi.product.version: Not Specified
>  dmi.sys.vendor: Dell Inc.
>
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-- 
Thanks and Sincere Regards
Antony Raj