I have filed a bug here https://bugzilla.kernel.org/show_bug.cgi?id=108721
** Bug watch added: Linux Kernel Bug Tracker #108721 http://bugzilla.kernel.org/show_bug.cgi?id=108721 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1511019 Title: Ubuntu 15.10 freezes occasionally To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1511019/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs