vkDisplayPowerControlEXT

To set the power state of a display, call:

VkResult vkDisplayPowerControlEXT(
    VkDevice device,
    VkDisplayKHR display,
    const VkDisplayPowerInfoEXT* pDisplayPowerInfo);

device is a logical device associated with display.
display is the display whose power state is modified.
pDisplayPowerInfo is a pointer to a VkDisplayPowerInfoEXT structure specifying the new power state of display.

device must be a valid VkDevice handle

display must be a valid VkDisplayKHR handle

pDisplayPowerInfo must be a valid pointer to a valid VkDisplayPowerInfoEXT structure

Both of device, and display must have been created, allocated, or retrieved from the same VkPhysicalDevice