Laptop display won't mirror to monitor

I’m trying to mirror the display from my laptop to an external monitor connected via HDMI, I’ve opened display settings but the checkbox for mirror display is grayed out, so it’s currently working as an extended display.
I’m running an AMD Apu with open source drivers if that helps

looks like a bug in xfce.
You should be able do that using xrandr

xrandr --output HDMI-1 --auto --same-as LVDS-1

dont forget to edit HDMI-1 and LVDS-1 to suit your needs output of xrandr command should let you know what to use

Maybe do a google search before asking :wink: