Please forgive me if this is not the appropriate place to report this (and kindly suggest the appropriate forum). Very new to github.
I have a Dell laptop with Mint 19.3 Mate installed. The video is Dell (but may be Radeon) not nVidia. I have the laptop screen marked as primary, and the orientation of the external monitor is to the left of the laptop display.
When I plug in the monitor's HDMI cable to the laptop, even though the monitor is powered off, all my windows (iconified or not) move to the external monitor.
I haven't been able to find any reports of this behavior, so have not real idea how to correct it.
Thanks and regards,
Dave