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Cannot adjust brightness in openbox fedora 19

asked 2013-09-07 12:55:49 -0600

rizwaan gravatar image

updated 2013-09-07 21:02:11 -0600

FranciscoD_ gravatar image

Hi folks,

I'm not able to adjust the display brightness in Open-box fedora 19, since i have KDE too, i can see the KDE System setting in the menu of openbox, when i try to open the setting, i got the following error messages.

Power Management configuration module could not be loaded. The power Management Service appears not to be running, This can be solved by starting or scheduling it inside '' Startup and Shutdown''

Please let me know how to configure the power management in openbox and i saw in some website that Openbox does not load power management by default - we must load it, or configure it to load in

Thanks in advance.

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answered 2013-09-12 06:59:37 -0600

athmane gravatar image

Try xbacklight which talk directly to XRandR (X11 ext.) (yum install xbacklight):

Increase the brightness: xbacklight -inc 5

Decrease the brightness: xbacklight -dec 5

A better way is to bind XF86MonBrightnessUp and XF86MonBrightnessDown to the previous commands. [1]

[1] hxxp://

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thanks athmane, i will keep this solution for future arise problems since i had re-installed fedora again.

rizwaan gravatar imagerizwaan ( 2013-09-13 00:02:00 -0600 )edit

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Asked: 2013-09-07 12:55:49 -0600

Seen: 675 times

Last updated: Sep 12 '13