01-29-2019 05:37 AM
My tablet is X1 Tablet 2nd (20JCS0LU2U) with Windows 10 (1809)
The option of "Change brightness automatically when lighting changes" is ON, but the brightness changing has never worked. When I checked the option OFF and checked it ON, the screen went a little dimmer and went back immediately.
As a result, the keyboard backlight which set to AUTO is not functional either. In one condition the backlight would light, that when in a dark room, set the backlight to AUTO, and check the option metioned above to OFF and then to ON, the backlight turns on.
I'm wondering whether the sensor is working, how can I check this? And where does the sensor locate on the systemboard? On the front-facing camera module?
Or it is the problem of Windows 10, some options are not set correctly.