when we start the update manager it works well all the pakages downloaded than in the end the erroe is came,
see the screen shot and following error
W:Failed to fetch bzip2:/var/lib/apt/lists/partial/ubuntu.qualitynet.net_ubuntu_dists_oneiric_main_binary-i386_Packages Hash Sum mismatch
, W:Failed to fetch bzip2:/var/lib/apt/lists/partial/ubuntu.qualitynet.net_ubuntu_dists_oneiric_restricted_binary-i386_Packages Hash Sum mismatch
, W:Failed to fetch bzip2:/var/lib/apt/lists/partial/ubuntu.qualitynet.net_ubuntu_dists_oneiric_universe_binary-i386_Packages Hash Sum mismatch
, E:Some index files failed to download. They have been ignored, or old ones used instead.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: update-manager 1:0.152.19
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic i686
ApportVersion: 1.23-0ubuntu1
Architecture: i386
Date: Fri Sep 23 14:10:10 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta i386 (20110915.1)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)
it is saying that they can be ignored but after this if we close it than there is not an option to install updates means we cant click on the install updates and in the update manager there is not a list of updates