Red Hat Bugzilla – Bug 540022
Brightness control Lenovo G450 fedora 12 x86_64
Last modified: 2009-12-04 14:41:58 EST
Description of problem:
The Brightness control doesn't work on a Lenovo G540 2949 CHU...
All other fn key shortcuts work except Brightness control. How do I control the screen brightness ?
Version-Release number of selected component (if applicable):
Steps to Reproduce:
Fn up arrow / down arrow doesn't work
Fn up arrow/down arrow should control screen brightness
I have installed the tbp and the system-config-xorg package .... but even then I am not able to control the gamma...... also I would like to be able to control the backlight brightness instead of gamma
I tried xbacklight . While I am able to control the brightness of the screen with xbacklight it jumps back to 50% in minutes.
Also the fn-uparrow / fn-dnarrow (default brightness control) works when fedora is still booting in the blue screen. But it stops working when the login dialogue screen is displayed.
Please try this workaround: reboot your machine with the 'nomodeset' kernel
parameter. This might be a duplicate of bug 519105 ?
Yes that solves it Thanks.
*** This bug has been marked as a duplicate of bug 519105 ***