How do you disable the screen getting darker on Acer AspireOne?

Hello, I have this Acer AspireOne netbook AO531h with Intel Atom processor and Windows XP Professional.

When the netbook is on battery power, the screen becomes darker to save energy, but my wife has trouble reading with such a dark screen. In the Intel Graphics configuration, there is a page to change the screen's power saving options, but it's all grayed out, as shown in the image.

I wonder, is there a way around this? Is there a way to make those options selectable? I tried to google for this but found nothing.
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Daniele BrunengoIT Consultant, Web DesignerAsked:
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pandarossaCommented:
******************SOrrY, this is the right post, the previous one is wrong!!! ******************
Hi,
you can adjust you LCD backlight level using a key combination: Fn + <- (<- is the left arrow key at the right of the keybord)

See the attached foto below.
If you want, you can reply this post sending me your AcerOne model in order to send you modded drivers to make this working without pressing keys.

Hope this helps!
best regards
acer-aspire-one-keyboard.jpg
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prazworldCommented:
Perhaps you could try the below Solution which I have already adviced to a requestor of similar nature.
http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Windows/XP/Q_25640819.html

Praveen.
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
I checked that out, but it doesn't apply because these are Intel's power saving options, not Microsoft. I have full access to Microsoft's options, but they are not related since Microsoft's options have no impact on the screen's lighting.
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prazworldCommented:
Gotcha, did you see if the Intel display drivers are properly installed from the Hardware tab in the Device Manager.

Praveen.
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
Yes, they are, and I also used Intel's online utility that checks for driver updates needed by your system, but it just said that I already have the latest drivers. I wonder if this is a "feature" of Atom cpus.
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pandarossaCommented:
Hi,
you can adjust you LCD backlight level using a key combination: Fn + <- (<- is the left arrow key at the right of the keybord)

See the attached foto below.
If you want, you can reply this post sending me your AcerOne model in order to send you modded drivers to make this working without pressing keys.

Hope this helps!
best regards
acer-aspire-one-keyboard.jpg
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
Thanks, very interesting! Yes, I'd love to try those modded drivers: the model is AO531-h.
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pandarossaCommented:
First of all, uninstall acer epower from your netbook, then restart your pc and download the new acer epower app: http://global-download.acer.com/GDFiles/Application/ePower/ePower_Acer_4.05.3003_W7x86_A.zip?acerid=633978447817943353&Step1=Netbook&Step2=Aspire%20One&Step3=AO531h&OS=702&LC=en&BC=Acer&SC=PA_7
Once donwloaded install this app, and reboot
Now you will be able to adjust permanently screen luminescence.

Best regards
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
Thanks!
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Daniele BrunengoIT Consultant, Web DesignerAuthor Commented:
By the way, that app is only for Windows 7, I guess I'll have to ditch XP.
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