4 Replies Latest reply on Jan 24, 2017 6:43 AM by Intel Corporation

    When laptop display turns on after being off for, I notice high brightness

    meatboi

      I bought the Xiaomi Air 13 Laptop (Windows 10 Pro) which has integrated Intel 520 graphics (and a dedicated nvidia 940mx card).

      When I don't do anything on the laptop for 5 minutes, the display will turn off (this is set in the "Power Options"). Once you move your mouse (or hit a key) the display will turn back on. At that moment when the display turns on, I observe a VERY high brightness for ~50 milliseconds and after that, the display immediately adjusts to normal brightness.

       

      If you set the display brightness to 100% everything is fine, because the graphics card - for what ever reason - sets the display brightness to 100% EVERY TIME the display is turned on (after being off). So you don't notice any difference because the transition from 100% to 100% brightness is smooth. But if your display brightness is set to (e.g.) 70%, you will observe a 100% brightness for 50 milliseconds, followed by a 70% brightness. This looks ugly and looks like a "lightning" to me. Apparently the graphics card will set the brightness no matter what to 100% when the display is turned on from a display-off state (even from sleep state), but it would make more sense to first set the brightness to 0%, then retrieve the brightness information, and set it accordingly....

       

      I am looking for a way to fix this, does anyone know how? I disabled adaptive brightness on Windows 10, but it all doesn't help. Any help is appreciated! Thanks.

       

      p.s.

      Here are the recommended drivers for the laptop. I used the following recommended Intel Driver Version 15.40.23.64.4444 (even an update to 21.20.16.4534 didn't help).