Bug#996328: further information

[David Christensen]

I moved the Debian 10 disk into the Dell Latitude E6520 laptop with 
optimus graphics.  I logged in and opened my usual set of applications 
-- Thunderbird, Firefox, 2 Thunderbird, and 6 Terminal.  I started the 
Oracle VM VirtualBox Manager and started a VM in headless mode and then 
closed the Manager.  I used the machine for several hours without any 
problems.  When I moved the mouse pointer from a Terminal window into 
the Xfce panel, the GUI freaked out, several things flashed on and off 
the desktop, and I ended up with a dialog asking me to confirm deletion 
of Workspace 2.

David