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: brltty (Ubuntu) Importance: Undecided => Low ** Changed in: brltty (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to brltty in Ubuntu. https://bugs.launchpad.net/bugs/1106173 Title: package brltty 4.4-5ubuntu3 failed to install/upgrade: cannot compute MD5 hash for file '/etc/brltty/am.ctb': failed to read (Input/output error) Status in “brltty” package in Ubuntu: Invalid Bug description: brltty failed to install. ProblemType: Package DistroRelease: Ubuntu 12.10 Package: brltty 4.4-5ubuntu3 ProcVersionSignature: Ubuntu 3.5.0-22.34-generic 3.5.7.2 Uname: Linux 3.5.0-22-generic i686 ApportVersion: 2.6.1-0ubuntu10 Architecture: i386 Date: Fri Jan 25 08:14:23 2013 ErrorMessage: cannot compute MD5 hash for file '/etc/brltty/am.ctb': failed to read (Input/output error) InstallationDate: Installed on 2012-06-09 (231 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423) MarkForUpload: True SourcePackage: brltty Title: package brltty 4.4-5ubuntu3 failed to install/upgrade: cannot compute MD5 hash for file '/etc/brltty/am.ctb': failed to read (Input/output error) UpgradeStatus: Upgraded to quantal on 2012-10-29 (89 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/brltty/+bug/1106173/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp