HP Compaq 6730 s: back - light Windows 7 vs Ubuntu

Hello!

I have this problem:

When I turn on the laptop screen is black.

Connection of the external screen I can see BIOS and Windows 7, but new and Black's built-in display.
A certain angle, it is possible to see the image on the screen.

By pressing fn + f7 or fn + f8 I see brightness slider but is black and nothing happen.

By pressing fn + f11 or fn + f12 I see the volume slider and fills with a blue color depending on what I'm doing - which works very well.

BUT, when I run Live Ubuntu usb built-in monitor works fine. Backlight is on, and the picture is fine.

Please help me!
I spent a few days to find a solution and nothing

Thank you in advance!

PS Sorry for my bad English

Problem solved!

Start > write in search: regedit > ctrl + f > write: "FeatureTestControl" > right click > modify... > data value > 41f048 > OK > restart the laptop

And build-in display works now!

BTW. It still does not work:

"By pressing fn + f7 or fn + f8 I see the brightness slider but is black and nothing would happen."

.. but light is ok, so this isn't problem now

Tags: Notebooks

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