There were plenty of messages in your dmesg about an external hard drive; it may be dying, or the usb equipment used to attach it to the computer may be bad, but it looks like something worth worrying about.
Thanks -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1432395 Title: Hard showing some error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1432395/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp