Fn + F2 (LCD) key does not turn off monitor completely #1805
Description
Brief summary
By pressing the Fn + F2 (LCD) key on the laptop NovaCustom NV41 Series, we can see the screen is turned off but not completely. This can be tested for example by displaying a white image (not in a maximized window to see the border of the image), which is still a bit visible after pressing the key.
A workaround to turn off the screen completely is to use this Linux command (when tested on Debian, the screen turned back on when moving the mouse or pressing a key):
xset dpms force off
How to reproduce
Open a white image without maximizing the window and press the Fn + F2 (LCD) key.
Expected behavior
Since the Fn + F2 (LCD) key turns off the screen, nothing should be visible.
Actual behavior
The white image is still a bit visible.
This can be misleading for the user that will think the screen is turned off but it will consume more battery since it is not really turned off.