Ubuntu 18.04 - Secondary Monitor not detected

[wasuwat]

I’m using Asus TUF Gaming laptop with GTX1660, Ubuntu 18.04, Nvidia Driver 435.
I connected a monitor via HDMI port, but it’s not detected.

Also, the main screen is flickering after back from sleep.

Please help.
nvdia-bug-repoort.log.gz (261 KB)

[generix]

Please check this:
https://forums.developer.nvidia.com/t/nvidia-xconfig-doesnt-do-what-i-want-it-to-nor-does-nvidia-settings/107883/7?u=generix