Vostro 3500 automatic dimming of the display?

Hi all

I found that my Vostro 3500 (15.6 WXGA LED display) is, sort of, automatically dimming the brightness of the display when the picture on the screen is dark.

It is very easy to reproduce this: I just put the paper painted in black, and I can see the brightness gradually dim. When I open a window, mainly white, the brightness increases again.

Is this a kind of "characteristic" (which I can't find anywhere and so no way to turn it off) and noted someone else?

Operating system is Windows 7 PRO x 64 with the latest drivers from Dell.

Interesting note: it seems that this behavior is present when Windows starts and loaded graphics driver. During the startup process, when the screen is black, 90% I did not notice the dimming. This would in my opinion a software about the behavior.

My next test will try with a live Linux, to see if it's really associated Windows or it is somehow in the firmware of the screen.

Thanks for any suggestions!

Concerning

Giulio

If anyone is interested, I found the answer.

This is a feature of the Intel HD Graphics drivers, which can be disabled through the graphics card Intel and multimedia control panel, section "Energy conservation", by not checking the "Balanced" profile when on battery or AC power.

By default, when a battery this profile is selected the gradation is located.

Concerning

Giulio

Tags: Dell Laptop

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