Thank you for taking the time to report this bug and helping to make Ubuntu better. Reviewing your dmesg attachment in this bug report it seems that there is a problem with your hardware. I recommend performing a back up and then investigating the situation. Measures you might take include checking cable connections and using software tools to investigate the health of your hardware. In the event that is is not in fact an error with your hardware please set the bug's status back to New. Thanks and good luck!
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.] ** Tags added: hardware-error ** Changed in: linux-lts-vivid (Ubuntu) Importance: Undecided => Low ** Changed in: linux-lts-vivid (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-vivid in Ubuntu. https://bugs.launchpad.net/bugs/1521035 Title: package linux-image-3.19.0-28-generic 3.19.0-28.30~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 Status in linux-lts-vivid package in Ubuntu: Invalid Bug description: Failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 ProblemType: Package DistroRelease: Ubuntu 14.04 Package: linux-image-3.19.0-28-generic 3.19.0-28.30~14.04.1 ProcVersionSignature: Ubuntu 3.19.0-33.38~14.04.1-generic 3.19.8-ckt7 Uname: Linux 3.19.0-33-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.19 Architecture: amd64 Date: Thu Nov 26 13:23:23 2015 DuplicateSignature: package:linux-image-3.19.0-28-generic:3.19.0-28.30~14.04.1:subprocess installed post-installation script returned error exit status 1 ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2015-09-07 (83 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) RelatedPackageVersions: dpkg 1.17.5ubuntu5.5 apt 1.0.1ubuntu2.10 SourcePackage: linux-lts-vivid Title: package linux-image-3.19.0-28-generic 3.19.0-28.30~14.04.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-lts-vivid/+bug/1521035/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp