Note: same issue as 'v4.15rc8' with 'v4.15.0 mainline build' from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15/
Note: same issue as 'v4.15rc8' with 'v4.15.0 mainline build' from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v4.15/