The solution by @robertjjoynt worked for me on 2017 ASUS ZenBook 3 (ux490ua) with Debian 9 with Kernel 4.9.0-4.
The solution by @robertjjoynt worked for me on 2017 ASUS ZenBook 3 (ux490ua) with Debian 9 with Kernel 4.9.0-4.