This is a new one on me.
I stepped out of the room for a few minutes and when I returned my desktop background had changed, gone was my custom desktop image and in place was the default Linux Mint Debian image. The desktop icons had changed too and I'd grown a wastebasket which I don't normally have on the desktop.
The desktop looks a bit like Gnome (I think, I've never willingly used Gnome) but I still have my Xfce4 panel and it works normally. I no longer get the "right click" applications menu on the desktop, just a small menu with seven items on it.
When I click on the applications menu button in the panel everything appears as normal and according to the "desktop settings" my desktop is still as it was. It's almost as if another window manager was running and overriding the Xfce one.
I checked that xfwm4 was running on start up and eventually removed .config/xfwm4 in order to start again. I got the default panel but the desktop remains the same.
Any assistance will, as usual, be gratefully acknowledged







