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: avahi (Ubuntu) Importance: Undecided => Low ** Changed in: avahi (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to avahi in Ubuntu. https://bugs.launchpad.net/bugs/1616711 Title: package avahi-daemon 0.6.31-4ubuntu1.1 failed to install/upgrade: cannot compute MD5 hash for file '/etc/avahi/avahi-daemon.conf': failed to read (Input/output error) Status in avahi package in Ubuntu: Invalid Bug description: error occured on update ProblemType: Package DistroRelease: Ubuntu 14.04 Package: avahi-daemon 0.6.31-4ubuntu1.1 ProcVersionSignature: Ubuntu 3.19.0-25.26~14.04.1-generic 3.19.8-ckt2 Uname: Linux 3.19.0-25-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.21 Architecture: amd64 Date: Wed Aug 24 20:17:34 2016 DuplicateSignature: package:avahi-daemon:0.6.31-4ubuntu1.1:cannot compute MD5 hash for file '/etc/avahi/avahi-daemon.conf': failed to read (Input/output error) ErrorMessage: cannot compute MD5 hash for file '/etc/avahi/avahi-daemon.conf': failed to read (Input/output error) InstallationDate: Installed on 2016-04-19 (128 days ago) InstallationMedia: Ubuntu-GNOME 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) RelatedPackageVersions: dpkg 1.17.5ubuntu5.7 apt 1.0.1ubuntu2.14 SourcePackage: avahi Title: package avahi-daemon 0.6.31-4ubuntu1.1 failed to install/upgrade: cannot compute MD5 hash for file '/etc/avahi/avahi-daemon.conf': failed to read (Input/output error) UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.avahi.avahi.daemon.conf: [inaccessible: [Errno 5] Input/output error] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/1616711/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp