Puppy Linux Discussion Forum Forum Index Puppy Linux Discussion Forum
Puppy HOME page : puppylinux.com
"THE" alternative forum : puppylinux.info
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

The time now is Wed 01 Jul 2015, 17:28
All times are UTC - 4
 Forum index » Advanced Topics » Hardware
How to control laptop LCD screen backlight? (Solved, plus)
Moderators: Flash, Ian, JohnMurga
Post_new_topic   Reply_to_topic View_previous_topic :: View_next_topic
Page 1 of 1 Posts_count  
Author Message

Joined: 11 Sep 2006
Posts: 34

PostPosted: Tue 26 Sep 2006, 23:32    Post_subject:  How to control laptop LCD screen backlight? (Solved, plus)  

So, I've spent much time over the last two weeks (30+ hours) trying to get puppy to control the LCB backlight of my laptop screen. It is currently at max brightness and there is nothing I can figure to do. I have:

-added modules: LCD, backlight, video
-compiled and installed hotkeys and acpid as per instructions here: http://www.da-cha.org/letsnote/
-compiled and installed pcc_acpi module (same link)
-installed updated Berkeley DB (3.2.9) to support hotkeys

all of this compiles and runs fine, just nothing happens to my screen brightness.

Has anyone else been able to alter the screen brightness on their laptop? I do not necessarily need to have my hotkeys working, but running at full brightness dramatically reduces my battery life. Also, when I leave my lid open, puppy will blank the screen but it is obvious that the backlight is still on. I'm a linux newbie so I could be over-looking something simple. Please help. I'm running puppyoffice 2.02.
Back to top
View user's profile Send_private_message 

Joined: 11 Sep 2006
Posts: 34

PostPosted: Wed 27 Sep 2006, 12:20    Post_subject:  

I solved my problem... it turns out that in my haste I copied the 'template' files over the real files in /etc/acpi. Once I reloaded the actual script, surprise, everything works. Even things I wasn't expecting to have work; my sound is now working, hoorah!

I had given up on the sound system, figuring that it was some weird bug that prevented it from working. However upon messing around in the /proc/acpi/pcc, the speaker "clicked" as I toggled the mute function. To my joy when I loaded http://www.weebls-stuff.com/toons/kenya/ (my favorite test for computer functioning) I was greeted by full sound for the first time in linux. After digging around in the scripts, I found the configuration area and now all is working.... and what's this? My laptop never sounded this good. Under Windows XP the sound was crackly at med-high volumes... under linux the sound is clear and very good until very high volumes.

the conlusion: Linux sounds better Laughing
Back to top
View user's profile Send_private_message 

Joined: 28 Sep 2006
Posts: 4
Location: Colorado, USA

PostPosted: Sat 03 Aug 2013, 08:40    Post_subject:  

Brightness backlight control For Precise 5.7 on a laptop.

xrandr --output LVDS --brightness .7

I guess .7 ~= 70% brightness.
Just run xrandr solo to see the output devices you can control.
xbacklight didn't work. It worked on Precise 5.6, but not 5.7.1.
Back to top
View user's profile Send_private_message 

Joined: 28 Sep 2009
Posts: 28
Location: Rio de Janeiro

PostPosted: Mon 16 Mar 2015, 17:59    Post_subject:  

As this is a similar thread, for anyone who still need a solution to control screen brightness in a laptop which, for any reason, does not have its brightness keys working, see CADEJO’s post at:
It essentially builds a pop-up menu at the TASKBAR to control brightness in JWM. I followed his brilliant workaround and managed to put back in good use a "sick" but still very powerful laptop (Sony VAIO, with Intel Core2 Duo P9500 @2.53Gh, 4 Gb Ram), which due to some spanking by previous owner (probably due to its OS (Ruindows) in a broken HD), its whole keyboard, touch-pad and all function keys, all went completely dead broken, with the screen locked at its highest possible brightness, causing lots of eye strain.
Back to top
View user's profile Send_private_message 
Display_posts:   Sort by:   
Page 1 of 1 Posts_count  
Post_new_topic   Reply_to_topic View_previous_topic :: View_next_topic
 Forum index » Advanced Topics » Hardware
Jump to:  

You cannot attach files in this forum
You can download files in this forum

Powered by phpBB © 2001, 2005 phpBB Group
[ Time: 0.0559s ][ Queries: 12 (0.0118s) ][ GZIP on ]