Since napi has changed a lot in the newer version of linux kernel, would you please try the latest mainline build (available at http://kernel.ubuntu.com/~kernel-ppa/mainline) to see whether the issue still exists.
Since napi has changed a lot in the newer version of linux kernel, would you please try the latest mainline build (available at http:// kernel. ubuntu. com/~kernel- ppa/mainline) to see whether the issue still exists.