How to duplicate screen on a secondary monitor in Phoenix OS? I usually use my laptop as a CPU. I put it aside and it is connected to a screen via a VGA cable. Recently, I installed Phoenix OS in my laptop,  but nothing was displayed on my secondary monitor. In windows 10, I only have to press "Windows + P" to see split screen option, but in this OS I couldn't find such settings.

How to get that setting?
replace with this command on grub.cfg
(if dual boot with win10 then search how to edit grub.cfg on windows 10)

menuentry 'Phoenix OS--ext display' --class android-x86 {
    insmod part_gpt
    insmod fat
    search --file --set=root /EFI/PhoenixOS/kernel
    linux /EFI/PhoenixOS/kernel quiet root=/dev/ram0 androidboot.hardware=android_x86 SRC=/PhoenixOS vga=788 video=1920x1080 video=eDP-1:d
    initrd /EFI/PhoenixOS/initrd.img


}

where 1920x1080 is my secondary display resolution and eDP is my laptop screen where -1 disable it 
in your case it may be LVDS-1:d try to add both