I'm using the XFCE Fedora 28 spin from
https://spins.fedoraproject.org/xfce/download/, installed in a VM in VirtualBox 5.2.12 r122591.
Before updates, everything works as expected - also when installing all current updates as of today except new kernel.
However when kernel update 4.17.2-200.fc28.x86_64 is installed, the mouse click focus stops working correctly. It seems as when a window is clicked and it gets mouse clicks, other windows then cannot receive mouse clicks.
Example: If the first thing I do after login is to click the panel to start a terminal, the terminal starts, but I cannot move/resize the window with the mouse. Only the panel now reacts to mouse clicks.
On the other hand, if after login I click elsewhere, such as right-clicking an icon in the tray, the panel now won't accept mouse clicks, but only the tray does.
Any inputs on this? Rebooting with the old kernel (4.16.3-301) fixes the problem.
Thanks, Søren