A problem recently encountered on a laptop Lenovo, From the range IdeaPad, Gave us few headaches.
Symptoms are as follows: Low display brightness and the impossibility of controlling light intensity in any way. Even though the light indicator looks like it is at maximum intensityon display It's just that something can be seen, and the intensity can not be controlled at all. Not even the keys F11 si F12.
In most situations this problem of low brightness of the laptop screen occurs after a Driver update al Integrated video cards. Intel HD Graphics. In our situation, it was Intel HD Graphics 4000, which, after a driver update, left us a bit in the "dark".
Low light laptop resolution
The simplest solving would be to Reinstall the original video driver. You can do it unload From the manufacturer's site (Lenovo in our case). At the time of installation I will let you know that you already have a newer video driver. Ignore this message and go with Driver installation In continuation. From the time of installation, you will see that the display light returns to normal, and the brightness settings begin to work again. After the installation is complete, restart the system.
You can do this on a dim light of the display, it is advisable to work on it in a dark room or if you have TeamViewr to do this in remote on another PC or laptop.
To prevent a new Intel HD Graphics driver update, go to the settings Windows Update And set as updates Do not do it automatically And let you choose what you want to update. Check for new updates, and if a graphical driver update appears, uncheck this update.
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