Sleep mode wakeup with black screen with curser for a few seconds

when the computer goes to sleep, sometimes when i click anybutton, it gives me a black screen with a curer and then it apparing everything normally. whats the problem causing this

I have the same problem but I do not know of any solutions. I am searching for one as well.
Let me rephrase the issue I experience. After the display goes off because of the energy saving settings, and after moving the mouse (or pushing a key) to wake it up, the screen appears black (but with the presence of the mouse cursor, which can move and even change shape---to a hand or a hyphen---if the pad is clicked) and stays black for a couple of seconds, from 3 to 10 seconds I believe.
The computer is not responsive after that but not before. The previous and normal behavior is intead for the screen to turn on immediately and the computer being responsive right away. Instead, now there is a window of 3-10 seconds where the screen is black with a cursor and the computer unresponsive.
Of course, it is very frustrating. Please help.

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Sleep mode wakeup with black screen with curser for a few seconds

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