lack of brightness control

When I upgrade from vista to windows 7 missing control brightness and when my laptop battery light don't overtemperature and brightness in power option is missing and I can not increase or decrease the brightness of function "fn" my laptop is sony vgn series.
How can I control the brightness?

Read the article: How to adjust the brightness and contrast of your monitor . You will find a section how adjust brightness automatically using Adaptive brightness.

You will also need to go to your laptop manufacturer website and search for a drivers. It may be necessary if you want to use the keys on your keyboard to increase/decrease brightness.

Depends on what graphics card you have, go to the manufacturer site and see is there any software for the control of your graphics card. This kind of software can automatically adjust the brightness when you unplug your laptop. It could be ATI Catalyst Control Center... but it depends on what graphics card you have, you need to find the website of the manufacturer of graphics cards.

Tags: Windows

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