LinuxQuestions.org
Welcome to the most active Linux Forum on the web.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices



Reply
 
Search this Thread
Old 12-25-2007, 05:48 PM   #1
YodaSlack
LQ Newbie
 
Registered: Jun 2007
Location: Taganrog, Russia
Distribution: Slackware
Posts: 3

Rep: Reputation: 0
Brightness control on laptops.


Hi to all.

Could you give me the start point for this problem.
I mean I have got hp pavilion dv6630er laptop. Everything is fine but the brightness control of my monitor does not work.
I supposed that there is some acpi function to make it works but I know nothing about this.

Thanks.
 
Old 12-25-2007, 05:53 PM   #2
Junior Hacker
Senior Member
 
Registered: Jan 2005
Location: North America
Distribution: Debian testing Mandriva Ubuntu
Posts: 2,687

Rep: Reputation: 59
Many laptops have 2 brightness settings in the bios, one for AC powered and one for battery powered. This is setup through "setup" or similar before the operating system boots up.
 
Old 12-27-2007, 12:02 AM   #3
YodaSlack
LQ Newbie
 
Registered: Jun 2007
Location: Taganrog, Russia
Distribution: Slackware
Posts: 3

Original Poster
Rep: Reputation: 0
Thanks,

But I think that is not good solution. I know that britness controll works fine under Windows and can't get it uder Linux.
 
Old 12-27-2007, 09:55 AM   #4
dracolich
Senior Member
 
Registered: Jul 2005
Distribution: Slackware
Posts: 1,173

Rep: Reputation: 47
What are you using to change brightness under Windows and Linux? I have an old Pavilion ze4315 and I've always used the Fn key with the F1 and F2 keys to change brightness. I believe all laptops have something similar designated by symbols printed on the keys and it should be controlled by the hardware and not the os.
 
Old 12-27-2007, 11:30 AM   #5
Alien_Hominid
Senior Member
 
Registered: Oct 2005
Location: Lithuania
Distribution: Hybrid
Posts: 2,247

Rep: Reputation: 53
It is controlled by special drivers, which you installed when installing windows. Those drivers probably access acpi/apm and consequently manages your screen brightness. What does happen if you follow dracolich advice?
 
Old 01-24-2008, 03:16 PM   #6
YodaSlack
LQ Newbie
 
Registered: Jun 2007
Location: Taganrog, Russia
Distribution: Slackware
Posts: 3

Original Poster
Rep: Reputation: 0
It seems that my English not so well. "dracolich advice" What does it means?
I understood that there is some acpi or apm interface to control brightness. And I want to know which one. But it seems that it is not possible.
 
Old 01-24-2008, 03:38 PM   #7
dracolich
Senior Member
 
Registered: Jul 2005
Distribution: Slackware
Posts: 1,173

Rep: Reputation: 47
My Pavilion laptop, for example, has symbols on the F1 and F2 keys that look like stars. If I hold the Fn button and press F1 repeatedly the screen gets brighter. Fn + F2 makes it darker. This function is controlled by the BIOS. I don't use graphic utilities for power management. There may be KDE or GNOME tools to change brightness using acpi but I've never checked.
 
Old 01-24-2008, 03:56 PM   #8
Uncle_Theodore
Member
 
Registered: Dec 2007
Location: Charleston WV, USA
Distribution: Slackware 12.2, Arch Linux Amd64
Posts: 896

Rep: Reputation: 60
Quote:
Originally Posted by YodaSlack View Post
It seems that my English not so well. "dracolich advice" What does it means?
I understood that there is some acpi or apm interface to control brightness. And I want to know which one. But it seems that it is not possible.
Have you tried modprobing "video.ko"? You might wanna look here
http://brightlcd.blogspot.com/2007/1...as-bright.html

PS
"dracolich advice" means the advice given by user dracolich, I suppose.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Laptop brightness on acer laptops. rohandhruva Linux - Hardware 7 02-02-2010 07:10 AM
kpowersave brightness control deactivated in opensuse 10.2 jandrade Linux - Laptop and Netbook 1 07-20-2007 11:32 AM
Laptop hardware control (e.g. brightness) lumix Linux - Laptop and Netbook 1 04-18-2007 05:49 AM
screen brightness control arunsri Slackware 4 10-20-2005 04:35 AM
xine brightness and contrast control lost QuiB Linux - Software 3 08-22-2004 11:25 AM


All times are GMT -5. The time now is 09:44 PM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration