Originally it is meant to dim the screen when it is dark and brighten it when there is too much light in the environment, helping people to reduce stress on their eyes while working. One of the main reasons for the brightness constantly changing on Windows is the adaptive brightness setting. That being said, many still use the device, although it still manages to cause problems to some people, and inaccurate brightness settings are something that users had to deal with for a while. However, these $900 million worth of Surface RT were written off due to a failure. This feature was generally met positively, as all the available 128GB versions of the initial devices were sold on the launch day. Surface Pro is a touchscreen-based 2-in-1 device that can transform from a laptop into a tablet easily. In other cases, people reported that the screen becomes incredibly dim after waking up from sleep. This issue affected the Surface Pro/Surface Go users mostly (although complaints were also seen from Lenovo community), as they said that the brightness is constantly changing after the device wakes up from sleep or hibernation. Many users have complained that brightness control was not working in Windows as expected.

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Brightness setting not working