TonyMac32,
Thanks for your check and response. In general, it's okay for me to move to 4.12 except the issue "reboot" you guys are discussing here. The reboot issue is only the reason I picked legacy kernel version for my setup. A failure of reboot is so painful for software package installation and remote maintenance. I wish either on of the issues autofs on 4.4 or reboot on 4.12 (even though it is hack) will be fixed. But many thanks for your efforts supporting this ASUS board.
Hidenori