Not sure if helpful but I just tried this on 4.5.0-040500rc5 and the problem is gone.
system-udevd is running at less than 1% of CPU -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1496927 Title: [Hyper-V] udev trying to modify owner and mode of /dev/vmbus/hv_vss To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1496927/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs