Bug 540022

Summary:	Brightness control Lenovo G450 fedora 12 x86_64
Product:	[Fedora] Fedora	Reporter:	debesh <debesh.bhatta>
Component:	system-config-display	Assignee:	Adam Jackson <ajax>
Status:	CLOSED DUPLICATE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	low
Version:	12	CC:	ajax, debesh.bhatta, eric.donkersloot
Target Milestone:	---
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-12-04 19:41:58 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description debesh 2009-11-21 23:06:46 UTC

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 ?
Thanks

Version-Release number of selected component (if applicable):


How reproducible:

Steps to Reproduce:
1.
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Actual results:
Fn up arrow / down arrow doesn't work

Expected results:
Fn up arrow/down arrow should control screen brightness

Additional info:
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

Comment 1 debesh 2009-11-24 05:10:53 UTC

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.

Comment 2 Eric Donkersloot 2009-12-01 14:54:50 UTC

Please try this workaround: reboot your machine with the 'nomodeset' kernel
parameter. This might be a duplicate of bug 519105 ?

Comment 3 debesh 2009-12-04 19:37:29 UTC

Yes that solves it Thanks.

Comment 4 debesh 2009-12-04 19:41:58 UTC


*** This bug has been marked as a duplicate of bug 519105 ***