How can I fix a brightness control issue?

[Windows Central Question]

brightness control issue

Hi,
I am having a brightness control issue. when I close my type cover, I was not able to access any brightness via action center nor via keyboard shortcut. however if I hibernate / sleep via power button from the beginning, I can still able to access brightness control with full functionality. It only happen when I close my sp4 with my type cover, and I will lose my brightness control functionality, and the only way is to restart the pc again.

Anyone encounter the same problem like me?

Thanks