I have had to go back to version 20.04LSE by way of a fresh install, but I am having a big problem with the screen display.
The Logitech mouse seems to be prompting a program's window to be hidden behind the background and so the window can not be read. Not all drop down menus on the desktop are hidden, but the activities drop down and ubuntu settings do not show on the screen once the problem is active. Places do show. Desktop Icons do not show.
I have tried more than one background. The problem usually arises after quickly moving the cursor to the top left of my primary screen. I have 2 screens. It just happened when I was in Firefox and moved the mouse to the top left corner in order to get the list of activities to show.
Sometimes I find some resistance between the two screens which I avoid by going to the other screen via the top left corner, other times it is because I want to open a second program. Fortunately the background hiding the windows does not happen as soon as I log in. I have therefore been able to post this message.
Logging in afresh causes the problem to temporarily go away.
The processor is an AMD 64bit, 15g memory., Mother board ASROCK FM2A88X EXtreme6+
20.04 was working well. I tried to upgrade to 21.04 and ended up with a corrupted version. That was subject to another posting.
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