I'm quite sure this problem affects me as well. Unfortunately my linux knowledge seems insufficient to track this problem down properly so I can only add some observations since upgrading my workstation to 14.04LTS :
* arbitrarily the load jumps from normal (between 0 and 3 during standard desktop workstation operations) to exactly 15 but(!) without really slowing the system down except for delays when switching users or trying to log in or out. This often (but not exclusively) happens after resuming from a lock screen. * iostats yields NO write/read load during high load * top yiels NO task excessively or exclusively consuming any CPU * there are no network shares mounted * a reboot solves this problem for several hours again. * shutdown hangs on Askingh all remaining processes to terminate - No error is shown but I have to hard-reset the pc. (as far as I can see after unmounting all filesystems - I had no fs problems regarding this issue so far) -- 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/1313275 Title: relogin fails with black screen, Xorg high load To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1313275/+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
