How to fix the flickering of the notification bar( on the top right side where the date and the battery percent where)

while I was updating my laptop (partial update). the update was requesting to restart the computer for some reason. when my laptop turns on the screen was flickering (shaking upside down) i follow the instructions to fix it. i install compix config… and after i follow the instructions, i fix the flickering screen but the notification bar is still flickering. (it appears and then dissappears. how to fix that problem.when i open the terminal and libre office writer it becomes flickery again.. pleaseee help me 🙁 i need to pass my project tommorow thankyou 😀