Can you try with 15.04 (stable) or 15.10 (development) releases? There were lots of changes since 3.8, and this bug may be fixed there.
** Package changed: gnome-flashback (Ubuntu) => gnome-panel (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1487404 Title: gnome-panel spins causing high cpu in Trusty 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1487404/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs