A backlight is a form of illumination used in liquid crystal displays (LCDs).
23
votes
14answers
70k views
Cannot change backlight brightness Ubuntu 14.04
This morning I found that I cannot change the brightness of my Dell XPs 13 laptop's display anymore. I tried the following to change the brightness
Use keyboard brightness keys
Run the commands shown ...
34
votes
6answers
50k views
How do I set default display brightness? [duplicate]
Is it possible to set the default display brightness so you don't have to re-adjust it everytime you reboot? My laptop display is killing my eyes at the login screen already because it starts at 100% ...
28
votes
7answers
19k views
Decrease Backlight Below Minimum
I have this laptop that doesn't handle the backlight very well.
In /etc/default/grub, I have added a acpi_backlight=vendor function to get it to work at all. Which is cool, and the backlight now ...
3
votes
2answers
6k views
13.10 Can't Adjust Dell Laptop Backlight
I have a Dell Studio 1558. When I originally installed 13.04 on it, I had to modify my /etc/default/grub with the following:
GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor dell_laptop.backlight=0 ...
4
votes
1answer
13k views
How to use xbacklight with brightness keys in a VAIO
I have a Sony VAIO VPCCW15FL, with Ubuntu 12.04 installed.
Sadly, the brightness keys do not work out of the box, although the brightness meter reacts to the brightness up/down keypresses.
Yesterday,...
12
votes
11answers
10k views
How to increase brightness in smaller steps?
Is there a way to adjust lighting step ? I have Lenovo L520, and Fn + Light Up or Down adjusts by 20%, how can I adjust the step to 10% ? it will help me fine tune lighting at my dark room.
3
votes
1answer
5k views
Changing Screen Brightness Through Keyboard Functions on My Notebook
I've installed Ubuntu 16.04 on my Asus X555LJ.
But I don't know how to install drivers or how to enable function keys to controls screen backlight brightness.
5
votes
2answers
629 views
Automatically adjust display brightness based on sunrise and sunset
There are similar questions and answers in Ask Ubuntu that point to these solutions:
f.lux® software to make your life better
Redshift adjusts the color temperature of your screen according to your ...
15
votes
5answers
67k views
Enable the keyboard backlights on supported Lenovo (e.g. Carbon X1) with command
Some Lenovo laptops have keyboard backlights, and they can be turned on using Fn + Space. There are three states: off, normal and bright.
When I start Ubuntu, these laptops always default back to a ...
7
votes
2answers
2k views
Dell XPS 13 9343 - keyboard backlight on at boot Ubuntu 15.10
I upgrade from Ubuntu 15.04 to Ubuntu 15.10 and now on the first boot the keyboard backlight is on. I can manually turn it off, but the setting is not remembered and the next boot results in the ...
13
votes
5answers
25k views
I cannot change the screen brightness
here's my problem:
Ever since I installed Ubuntu 12.10 on my computer I haven't been able to change the screen brightness, it was always set to the maximum. I did take a look at this post:
Decrease ...
3
votes
3answers
47k views
Keyboard backlight not working on an Asus N56V
See this question.
The FN keys are not working
Using answer in this question I installed the asus-wmi-dkms_0.2_all.deb.gz package
Now, using xev I see that the keys emit keycodes (for backlight ...
1
vote
1answer
8k views
Keyboard light hotkey (Fn + F3 and F4) rarely work on an Asus G60J
Im using Ubuntu 12.04, and my laptop is an Asus G60J.
Specifications:
Ubuntu 12.04 64bit
Intel i7 720qm
Nvidia gtx 260m
4gb RAM
The laptop always start with the keyboard backlit On. The hotkeys ...
5
votes
1answer
6k views
Ubuntu 15.04 Suspend doesn't run `pm-suspend`
After upgrading to Ubuntu GNOME 15.04 (from 14.10), I noticed my pm-utils hooks in /etc/pm/sleep.d aren't running anymore on suspend/resume.
I have a custom script which saves the brightness before ...
3
votes
1answer
4k views
How do I make Fn+f2/f3 change the brightness on my HP dv7-6135dx?
The problem described below riddled me for quite a while and couldn't find a straight forward answer anywhere online. I have found a solution and I would like to use this post as a documentation ...
5
votes
5answers
8k views
Backlight can't be turn on in Acer Aspire 4736
When I booted up my newly installed Ubuntu 11.04, I discovered, to my dismay, that the backlight was off by default. The keyboard shortcut (which is Fn+F6 on my Acer Aspire 4736) for turning on the ...
10
votes
2answers
8k views
How do I deactivate dynamic contrast on a Dell XPS?
I am experiencing annoying automatic backlight brightness changes under ubuntu 12.04 LTS on my Dell XPS ultrabook.
It seems to be connected to the amount of white pixels on the screen (switching ...
5
votes
3answers
2k views
nvidia backlight brightness problem
Problem
Unity shows control while I press the Fn+Increase/Descrese brightness, but nothing happens. In console brightness doesn't work too while X server is running.
Checked solutions
I have tried ...
2
votes
1answer
4k views
Start asus laptop UX32VD with keyboard backlight off
I'd like a way to set the default keyboard backlight state to "off". I'm running Ubuntu 13.04 on an Asus Zenbook UX32VD. All the function keys work, but currently I have to turn off the keyboard ...
7
votes
1answer
10k views
How to stop gnome-power-manager from changing the global backlight setting?
After installing Ubuntu on my ThinkPad T510, the GDM screen and GNOME session would always start at 100% brightness.
I quickly found out, that this can be controlled via gnome-power-preferences, but ...
5
votes
5answers
7k views
Make Ubuntu remember screen brightness level without xbacklight
The problem is that Ubuntu always resets the brightness level to maximum after every reboot. I installed the xbacklight utility, but commands like xbacklight -get or xbacklight -set XX don't work. I ...
3
votes
2answers
466 views
Lenovo ideapad brightness keys not generating any events in Ubuntu 16.04.1
I have a new Lenovo Ideapad 500S with a fresh Ubuntu 16.04.1 running on it. Unfortunately, the brightness up/down keys don't work. (They work fine in Windows.)
Running acpi_listen shows me generated ...
3
votes
5answers
6k views
After installing fglrx on Ubuntu 14.04 there is no backlight (hd 5470). Is there any workaround?
I've installed fglrx driver on my Asus k52je laptop with mobility radeon hd 5470 using additional drivers window in ubuntu. I get black screen after reboot. When I hold power button i can barely see ...
1
vote
3answers
2k views
Brightness Hotkeys Only Slightly Work
I just installed Precise on my Samsung Laptop (QX412-S01au, using Ubuntu 2D). The brightness hotkeys sort of work:
Adjusting the brightness using the slider in the control panel works just fine
...
6
votes
1answer
205 views
Set initial startup background brightness depending on daytime
I run Ubuntu 16.04 on an Acer Aspire E5-773G notebook. Unfortunately, I can not use my brightness function keys on the login screen, so the first moment when I am able to change my screen backlight ...
3
votes
0answers
497 views
Switch off laptop backlight when locking screen [duplicate]
Possible Duplicate:
How can I disable backlight when I lock the screen?
I'm using an IBM Thinkpad t61 and wish to have the backlight switched off when locking the screen.I've been told to use ...
0
votes
2answers
5k views
Sony Vaio-Brightness Settings not Changing
I've searched for this problem but I cant find a straight answer.
If I go into /etc/class/backlight, there's nothing there. Could someone help?
I have the Nvidia Driver installed, and the Fn keys ...
13
votes
3answers
15k views
Increase screen idle dim timeout
On Ubuntu 11.10, when on battery, the screen dims after 10 seconds of inactivity. This is annoying because it is too short. Is there anyway to increase this timeout?
I know I can disable it, but ...
11
votes
4answers
11k views
Reverse-Engineer Driver for Multi-colored Backlit Keyboard on Clevo Laptops
Here's my situation:
I recently purchased a Sager NP9170 (same as the Clevo P170EM) and it has a multi-colored, backlit keyboard. Under Windows 7, you can launch an app that allows you to change the ...
17
votes
6answers
72k views
How to make keyboard backlight Fn buttons work in Samsung Series 9?
I've just installed Ubuntu 12.10 on my Samsung 900X4C. However, I can't get the keyboard backlights to work.
I added the keymaps as per community docs - Samsung Series 9 (section Function Keys). But ...
10
votes
5answers
6k views
Macbook Pro boots with full screen brightness and keyboard backlight
I have dual-booted my Macbook Pro with Ubuntu 12.04 . Whenever i log-in to Ubuntu, it does so with full screen brightness and keyboard backlight at full . How do i get rid of this? How can i tweak the ...
5
votes
1answer
21k views
xbacklight: No outputs have backlight property - No /sys/class/backlight folder
I installed xbacklight, hoping that it would be able to control my brightness. When trying to change brightness, I was told "No outputs have backlight property". After looking around, I found that ...
1
vote
1answer
3k views
How can I enable keyboard backlight on sony vaio pro with ubuntu 13.10
How can I enable keyboard backlight on Sony Vaio pro with Ubuntu 13.10?
I have already tried setting the bit in /sys/devices/platform/sony-laptop/kbd_backlight with echo 1 | sudo tee /sys/devices/...
7
votes
2answers
8k views
How to disable Macbook keyboard backlight
How do I disable the keyboard backlight, by turning it completely off, on a Macbook in 12.04?
Whenever I reboot, Ubuntu sets the backlight to 100% brightness, and frustratingly the new function keys ...
3
votes
5answers
4k views
Last couple of fglrx drivers on Ubuntu 12.04 have backlight support broken
I've been keeping up with latest fglrx releases on AMD's website and it appears that both the last stable (13.4) and beta (13.6) drivers have brightness broken in Ubuntu 12.04 with all the latest ...
5
votes
3answers
5k views
Why does Ubuntu reset brightness settings at the loading screen?
Since I first installed Ubuntu 11.10, I noticed that volume and screen brightness get reset every time Ubuntu starts.
Why is this so? And what ways are there to keep brightness and volume levels ...
4
votes
3answers
4k views
Macbook Pro backlight control not working on Ubuntu 16.04
I'm trying to fix the backlight issue on my Macbook Pro Retina after installing Ubuntu 16.04.
The problem is the backlight dimmer buttons F1 F2 or Fn+F1 and Fn+F2 are not working at all after ...
7
votes
1answer
316 views
“monitor brightness down” key resets brightness before lowering it
My monitor brightness down key resets my brightness before lowering it, effectively leaving me at near max brightness. I do not experience any problems with the brightness up key.
I'm using a Dell ...
6
votes
1answer
870 views
Can you help me write a script to set a new default brightness for the screen/keyboard after login?
On my Macbook Pro Ubuntu alsways boots with...
keyboard brightness at maximum illumination
screen brightness at maximum illumination
...both which I need almost never during normal usage.
Question
...
3
votes
0answers
3k views
Can't change screen brightness running Ubuntu 14.04LTS on Samsung NP510R5E
FIXED!
After DBANing my hard drive I installed Ubuntu 14.04LTS and quickly realised I've been unable to change screen brightness. This isn't too much of an issue when AC power is plugged in as the ...
2
votes
1answer
3k views
GUI changes brightness in wrong /sys/class/backlight/*/brightness
When I use Fn+F6 / F7 (brighness down and up on Toshiba) the brightness notification opens up and responds, but the actual screen brightness remains unchanged. When I go to Settings > Brightness and ...
1
vote
1answer
3k views
How to fix Acer Aspire 4736z back light brightness control in Ubuntu 13.04?
A simple way to fix Acer Aspire 4736z back light brightness control problem using hot keys (Fn + Brightness +-)
1
vote
1answer
777 views
How to prevent screen from going black (back light is shut down) at startup (laptop) Ubuntu 12.04?
So,in may laptop with Ubuntu 12.04, the startup is like this:
1) I see the Ubuntu logo with the 5 dots on a purple background for a few seconds.
2) The screen goes completely black (no back light), ...
1
vote
1answer
1k views
No brightness control on Asus 75 laptop
How can I get the brightness on my ASUS G75 laptop to work in Ubuntu 12.10 alpha?
On my MacBook Pro, there used to be an nvidia-bl-dkms module. On my Dell XPS 15z, it worked out of the box. Now I ...
0
votes
1answer
2k views
/sys/class/baclight folder is empty, leading to blank screen [duplicate]
I recently tried to change the default brightness of my ubuntu by echoing values to /sys/class/backlight/acpi_video0/brightness, and installing xbacklight, as suggested by answers to other questions. ...
0
votes
1answer
460 views
Dell Precision M4500 laptop Keyboard backlight issues
While running (or more specifically loading ubuntu 16.04) ubuntu sets my keyboard backlight to off (brightness, not on/off, but lowest possible brightness). I setup Windows 7 (since it actually has ...
4
votes
2answers
1k views
Mac Keyboard Backlight ubuntu 12.04
Running Ubuntu 12.04, I can't get the keyboard backlight on a Macbook Pro (mid 2012) to turn on. When I press the brightness button, the display shows up on full but the lights do not turn on. It ...
4
votes
1answer
1k views
How do I add sudo commands to a keyboard shortcut?
I am new to linux, so bear with me. I am running Ubuntu 16.04 on a Sony Vaio laptop, which features a keyboard backlight. I can enter this command into the terminal, putting a "0" in place of *value* ...
3
votes
2answers
544 views
Is there an App that can make my desktop dimmer
I used an app in Windows 7, I think called dimmer to make the screen change its contrast settings so I could dim it lower than the controls of the PC defaults such as function key or the power options ...
3
votes
2answers
760 views
Macbook starts with the screen on minimum brightness
I have a Macbook2,1 with Ubuntu 12.04. When I start the computer the back light is on and I can see all of the boot stuff. Once the GUI begins to start up the backlight is turned completely off and I ...
