Last evening, I received my new ThinkPad T450s laptop that I had ordered a couple of days ago through an ecommerce website. Since the ThinkPad 450s ships with Windows 7 Pro edition, I upgraded the OS to Windows 10 Pro using the free upgrade offer, and the upgrade process went smoothly without any installation or activation issues.
Adaptive screen brightness
After upgrading to Windows 10 and installing/updating all drivers, while browsing the web, I noticed that Windows 10 was automatically adjusting the screen brightness. Like most uses, I prefer manually setting screen brightness and don’t want the operating system to automatically adjust screen brightness with the help of ambient light sensors.
For the uninitiated, when the adaptive screen brightness feature is running, Windows 10 calculates the ambient light using built-in sensors of your PC and automatically adjusts the screen brightness accordingly.
Intel power saver technology
If your Windows 10 is automatically adjusting the screen brightness, it’s most likely because a feature called adaptive brightness is turned on. And if you’re sure that the adaptive brightness or auto brightness is disabled on your PC, then it could be because your PC using Intel HD graphics, and the Intel power saver technology is trying to save some power by automatically decreasing backlight intensity.
In this guide, we will see how to disable the auto brightness or adaptive brightness in Windows 10. Use the directions in Method 2 to configure Intel HD Graphics Control Panel to turn off the display power saving technology which decreases backlight intensity to extend the battery life.
To disable adaptive or auto brightness:
Step 1: Right-click on the battery icon in the system tray, and click Power Options to open the same.
Step 2: On the left-pane, click Choose when to turn off the display option to open Edit Plan Settings window.
Step 3: Here, click Change advanced power settings to open Power Options dialog.
Step 4: Extend Display, extend Enable adaptive brightness, and then select Off option for both On battery and Plugged in.
Click Apply button.
Note that you have just disabled adaptive brightness only for the current power plan. So, if you often switch between power plan, you need to do the same for all power plans. For instance, if you just disabled adaptive brightness for Balanced power plan, you will need to do the same for Power saver plan as well if you don’t want Windows 10 to automatically adjust the brightness while using Power saver plan.
Disable Intel power saver technology
I am no expert and I might be completely wrong, but it looks like the Intel power saver technology was the reason why I was feeling like the display brightness was automatically adjusting even after turning off adaptive brightness.
Use this method only if you have a feeling that the screen brightness is automatically adjusting even after turning off auto brightness using the above mentioned instructions. Obviously, this is only for PCs that ship with Intel on board graphics.
There might be a similar feature/option in graphics drivers from other manufactures as well. Have a look at the properties of graphics driver before contacting Microsoft support.
Step 1: Right-click on desktop, click Graphics Properties.
NOTE: If Graphics Properties option is not available in the desktop context menu, open Control Panel, change View by to small icons and then click Intel HD Graphics.
Step 2: Once Intel HD Graphics Control Panel is launched, click Power.
Step 3: On the left-pane, click On Battery.
Step 4: Finally, click Disable option for Display Power Saving Technology and then click Apply button.
If the issue is fixed, remember that Intel graphics Control Panel might be reset to default settings when a newer version of the driver is installed and you might need to disable the feature again by following the above mentioned directions.
Your automatic brightness issue should now be solved. Good luck!
Do let us know if you were able to fix the issue using one of these methods.