Comment 1 for bug 1848823

[Sorry I don't speak Spanish.]

Please try if you can the following instructions:

Try running, in a terminal:

window_id=`xwininfo | grep "Window id" | cut -d " " -f 4`

Now click on the terminal window, and then run:

xdg-screensaver suspend $window_id
xdg-screensaver resume $window_id

This performs the same steps at a lower level as turning Caffeine on then
off again manually. If this gives the same problem as using Caffeine, then
the bug is definitely not in Caffeine.