I like my new Linux Mint XFCE but I frequently encounter a problem: Windows suddenly cannot be brought to front by a mouse click and become the window that receives keystrokes. I googled and found a tip - just type
in the Terminal and the Windows server wakes up again. The tip works, but there is a catch-22: If there isn't a Terminal window in front already that will receive keystrokes, then pulling the plug and loosing whatever is unsaved is the only option. Since I can find a description of the phenomenon, plus the tip, on the web, I do not suppose that it is a quirk with my computer, but rather an XFCE bug that I really hope that the XFCE-team would deal with.
Thanks many times,