LinuxQuestions.org
Welcome to the most active Linux Forum on the web.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Laptop and Netbook
User Name
Password
Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

Notices

Reply
 
Search this Thread
Old 09-06-2012, 12:28 PM   #1
Ormu
Member
 
Registered: Jun 2011
Location: Finland
Posts: 56

Rep: Reputation: Disabled
Thinkpad X21 & Debian - how to turn off LCD backlight


I'm using an old IBM Thinkpad X21 laptop with Debian Squeeze as a server (irc bouncer etc.). I'd like to turn the display backlight off to save power and the backlight CCFLs itself but I haven't found a way to do so.

The screen goes blank automatically after some time but the backlight still stays on.

DPMS via xset does not work because X is not installed.

Fn+F3 should turn the LCD off but it doesn't work either. I think I saw some bug reports for thinkpad-acpi about this problem.

Is there a way to do it at all? Or do I just have to keep it on, brightness at minimum?

Last edited by Ormu; 09-06-2012 at 12:32 PM.
 
Old 09-06-2012, 03:02 PM   #2
TobiSGD
Moderator
 
Registered: Dec 2009
Location: Hanover, Germany
Distribution: Main: Gentoo Others: What fits the task
Posts: 15,592
Blog Entries: 2

Rep: Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046Reputation: 4046
You can try it with the setterm command.
Code:
setterm -powersave powerdown
should do the job, but you may want to have a look at
Code:
man setterm
to get more info about the other options.
 
Old 09-09-2012, 02:22 PM   #3
Ormu
Member
 
Registered: Jun 2011
Location: Finland
Posts: 56

Original Poster
Rep: Reputation: Disabled
I tried to use setterm -powersave powerdown and setterm -powerdown 5 (for 5 minute timeout) but neither of them worked... Could the BIOS setting "Screen blanking" (enabled/disabled) affect this? Changing that setting didn't do anything but I hadn't tested setterm commands back then.

Last edited by Ormu; 09-09-2012 at 02:23 PM.
 
Old 09-09-2012, 02:30 PM   #4
jefro
Guru
 
Registered: Mar 2008
Posts: 11,549

Rep: Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405Reputation: 1405
Thinkpads used to have a hot key to turn off backlight. I think it was alt and two n keys or something like that.
 
Old 09-12-2012, 10:20 AM   #5
Ormu
Member
 
Registered: Jun 2011
Location: Finland
Posts: 56

Original Poster
Rep: Reputation: Disabled
Quote:
Originally Posted by jefro View Post
Thinkpads used to have a hot key to turn off backlight. I think it was alt and two n keys or something like that.
Fn + F3 should do it but it didn't work. What do you mean by two n keys? Tapping "n" key twice?
 
  


Reply

Tags
backlight, lcd, thinkpad


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
help on laptop's LCD backlight fastestOS Slackware 2 08-25-2008 04:37 AM
No LCD backlight after resume from suspend BogusTrumper Linux - Software 4 04-18-2007 09:51 AM
Standby LCD backligh powerdown. Howto turn off backlight. Joseph Casey Linux - Desktop 1 03-20-2007 08:17 PM
Problems with X on a thinkpad x21 with ati mobility p/m kalzifer Linux - Laptop and Netbook 10 08-26-2006 06:03 PM
LCD backlight does not turn off on console (acer travelmate 291LMi) zen_guerrilla Linux - Laptop and Netbook 0 07-16-2004 11:49 AM


All times are GMT -5. The time now is 03:31 AM.

Main Menu
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