And I , from yesterday, after the weekly updates, by opening today my system (Ubuntu 12.04.5 LTS) i faced than same problem. One of my eight cores of my system worked at 100% .
As I watched from the application ''top'' the process charged my system was the "ightdm". Than he shown from the application "synaptic package manager", i have installed the ''ightdm (1.2.3-0ubuntu2.6)'' version, description : http://pastebin.com/M6DKpJrV Following this guide : http://www.g-lts.info/index.php/forum/odigoi-odigies-xrisis/247-ypovathmisi-paketon-se-proigoymeni-ekdosi reverted to version "ightdm (1.2.3-0ubuntu2.5)" and longer everything move smoothly (as before). If there is anything new please let as know. Thank you very very mych. :) (Sorry for the perhaps bad english) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lightdm in Ubuntu. https://bugs.launchpad.net/bugs/836616 Title: 100% cpu usage in lightdm Status in Light Display Manager: Fix Released Status in lightdm package in Ubuntu: Triaged Bug description: Hey, it seems that there's an issue with 0.9.4 cpu usage. It doesn't look like it's a resurgence of #770725 since it appears as soon as lightdm is launched, not after login. Strac'ing the process doesn't give anything. If you need anything more, please ask. To manage notifications about this bug go to: https://bugs.launchpad.net/lightdm/+bug/836616/+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