I had this ame error last night when attempting to update xubuntu 15.04 to 15.10.. left system unusable
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to modemmanager in Ubuntu. https://bugs.launchpad.net/bugs/1481798 Title: package:modemmanager:1.4.10-1:subprocess installed post-installation script returned error exit status 100 Status in modemmanager package in Ubuntu: Confirmed Bug description: The Ubuntu Error Tracker has been receiving reports about a problem regarding modemmanager. This problem was most recently seen with version 1.4.10-1, the problem page at https://errors.ubuntu.com/problem/abc807de9d9c87d965fea31c865192edb30b6738 contains more details. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1481798/+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