Kamal Mostafa: You were correct. Installing the "extras" made my track ball work. The computer has now held up for several hours, which is considerably longer than it survived under the -69 version. So -- I think the -70 fixes it, at least for me.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1566726 Title: System freeze after update to 3.16.0-69-generic [NULL pointer reference in radeon_fence_ref] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1566726/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs