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Need brighter display output on Netbook screen, Where is the parameter file.

asked 2013-09-09 19:10:21 -0500

lsatenstein gravatar image

updated 2013-09-11 22:33:37 -0500

FranciscoD_ gravatar image

Ever since updating from Fedora 17, I have been upable to get the screen intensity that I need in order to see the display output in normal room lighting. It is not the screen that is at fault, as the intensity of text and background is normal during the boot and startup - logging of the processes.

This problem started with Fedora 18, and is also present in Fedora 19

Is there in one of the directories, a parameter file that controls the screen driver for output intensity? If yes, where is it?

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Maybe you should change your question title to "bootup screen brightness" to emphasise the fact that the problem occurs during the booting process. Alo, mention what graphics driver you are using. Sometimes it makes a different.

Out of curiosity, does GRUB have adequate brightness?

I had a similar issue before, and I fixed it by adding the line acpi_backlight=vendor to the boot string. You should be able to test within the initial GRUB screen. You can reply to this comment if you want me to give more explanations.

hmaarrfk gravatar imagehmaarrfk ( 2013-09-09 20:28:39 -0500 )edit

Boot up brightness is fine, as all is readable in normal or bright light. But F19, for example, cannot be viewed in a normal office lighting environment. I need a hood around the netbook.

lsatenstein gravatar imagelsatenstein ( 2013-09-10 22:08:16 -0500 )edit

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answered 2013-09-10 11:55:11 -0500

Amit Caleechurn gravatar image

Try one of the following:


yum install xbacklight

xbacklight -set 100

Modify the sys parameter where you can replace 3 by 0 to 7

echo 3 > /sys/class/backlight/acpi_video0/brightness

If it works make it persistent.

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answered 2013-10-06 00:59:58 -0500

lsatenstein gravatar image

Fedora 20 on the netbook, has a brightness adjustment that works, I can now make use of the netbook in bright (not sun) light.

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Asked: 2013-09-09 19:10:21 -0500

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Last updated: Oct 06 '13