Public bug reported: Update Manager fails to download any updates. It asks to check the internet connection, but my internet connection is fine. I have tried this with a connection requiring proxy and two separate connections without proxy. UM throws up an error message pasted below. In addition, my notification areas has an indicator which says: "The update information is outdated. This may be caused by notification problems or by a repository that is no longer available. Please update manually by clicking on this icon and then selecting 'Check for Updates' and check if some of the listed repositories fail."
satchit@awesomeness:~$ lsb_release -rd && apt-cache policy update-manager Description: Ubuntu 11.10 Release: 11.10 update-manager: Installed: 1:0.152.25.8 Candidate: 1:0.152.25.8 Version table: *** 1:0.152.25.8 0 500 http://in.archive.ubuntu.com/ubuntu/ oneiric-updates/main i386 Packages 500 http://security.ubuntu.com/ubuntu/ oneiric-security/main i386 Packages 100 /var/lib/dpkg/status 1:0.152.25 0 500 http://in.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages Error output: W:GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F192197F81992645, W:GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 326DDB7DA68563AE, W:GPG error: http://ppa.launchpad.net oneiric Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY C2518248EEA14886, W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/oneiric-security/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) , W:Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/oneiric/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) , W:Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/oneiric-updates/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) , W:Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/oneiric-backports/Release Unable to find expected entry 'independent/source/Sources' in Release file (Wrong sources.list entry or malformed file) , 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 1:0.152.25.8 ProcVersionSignature: Ubuntu 3.0.0-16.28-generic 3.0.17 Uname: Linux 3.0.0-16-generic i686 ApportVersion: 1.23-0ubuntu4 Architecture: i386 CheckboxSubmission: 6a389bf83db22bee5a58087f9e3fc863 CheckboxSystem: 2954e74ba17fb0e37fc942cd1d9fab4e Date: Fri Mar 9 16:23:21 2012 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012) PackageArchitecture: all SourcePackage: update-manager UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: update-manager (Ubuntu) Importance: Undecided Status: New ** Tags: apport-bug i386 oneiric running-unity -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/950725 Title: update-manager fails due to wrong sources To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/950725/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs