Questions related to screen brightness.

learn more… | top users | synonyms

0
votes
2answers
58 views

Gamma correction with Upstart and a script

I've written an Upstart job to automatically change display gamma according to change in display brightness: start on (backlight-device-changed) exec /usr/bin/gammach And this is "gammach": ...
0
votes
1answer
90 views

Ubuntu refuses to boot with acpi_backlight=vendor

I bought a Dell Inspiron 14 5000 series and dual booted Windows 8.1 and Ubuntu GNOME 14.04. The brightness would not change, so I booted with kernel parameter acpi_backlight=vendor and it worked. I ...
0
votes
1answer
152 views

Backlight keyboard won't turn on samsung ativbook 6 ubuntu 14.04

So I have recently installed Ubuntu 14.04 and I like it but I can't seem to make the back-light keyboard to work. I have search hours for a solution but I can't find the script: kbd_brightness ...
1
vote
2answers
39 views

Startup script for brightness

Not so long ago I replaced XP for Lubuntu 14.04 on a old PC, and it works great. To make it perfect, I want to autoexecute "xrandr --output VGA-1 --gamma 3:3:3 --brightness 1" on startup or boot. ...
0
votes
0answers
36 views

Screen brightness is always full [duplicate]

The screen brightness of my laptop is always full when I log in Ubuntu. When I set it low and restarts its again on its maximum. I want it to remember my last choice. How to do this?
2
votes
4answers
448 views

Backlight issues with Asus X551MAV-EB01-B

I've got a fresh install of trusty (xubuntu if that matters, I don't think it should) on a Asus X551MAV-EB01-B. My function keys for brightness don't work. Here's what I know so far: If I pass ...
0
votes
1answer
46 views

Editing max_brightness

Is it possible to edit the value in /sys/class/brightness/acpi_video0/max_brightness/ ? I've tried: sudo echo 16 > max_brightness from the directory, but I'm getting Permission Denied The current ...
0
votes
0answers
128 views

Sony Vaio SVE15113ENB brightness Fn key slider issue -Ubuntu 14.04 LTS

I am using a Sony Vaio SVE15113EN laptop. Recently I installed Ubuntu 14.04 and found out that I am unable to adjust my display brightness slider. The brightness is so high that I am unable to use the ...
0
votes
0answers
23 views

Brightness keys registering, but no effect

I have (very) recently installed Ubuntu, and am having some issues with the brightness. I'm using an HP ProBook - the brightness keys are being registered no problem, and when I go into Brightness ...
1
vote
1answer
25 views

Screen dims when looking at Dark Screens

I am using Ubuntu 14.04 on a Dell Inspiron 11. It uses Intel's Integrated graphics cards. The problem I'm having is when ever I bring something up on the screen that is dark (such as a terminal ...
0
votes
1answer
83 views

Brightness doesn't decrease in Ubuntu 14.04

I've recently installed Ubuntu 14.04 in my Dell Inspiron 5521. I find that brightness is set to a maximum level and Brightness keys doesn't work though they show as if it gets decreased. I searched ...
1
vote
2answers
40 views

How to reduce LCD brightness if intel_brightness is unistalled?

tried echo,xrandr and even xbacklight couldn't reduce backlight of my screen. Can anyone suggest any other way?
0
votes
0answers
76 views

Xubuntu - How do I map the brightness keys to run a script?

I'm pretty new to Linux so bear with me. I have an emachines laptop (ugh) with FN + Left Arr / Right Arr brightness keys. These work perfectly fine in Windows but do not work in Xubuntu. What happens ...
0
votes
1answer
100 views

Brightness buttons on Macbook Pro 7.1

I'm following the steps here. The website says to set the driver to NVIDIA binary Xorg driver and nvidia-current (not nvidia-current-updates), but I don't see that option. I set the driver to ...
0
votes
0answers
81 views

Xubuntu (Server Install) screen blanks for 1 second after 1 minute

Little hard to understand the question from the title, but I'll get detailed here. After EXACTLY 60 seconds of init starting and the system booting, the screen will seem to "restart", blanking out for ...
0
votes
0answers
120 views

How do I get the OSD for brightness hotkeys on Kubuntu 14.04 KDE 4.13?

I am using KDE SC 4.13.2 on Kubuntu 14.04 (64-bit). The screen brightness changes with the brightness hotkeys on my keyboard (Lenovo G500) but the OSD showing the brightness level does not appear. The ...
0
votes
1answer
657 views

Ubuntu 14.04 brightness shortcut not working

I'm using Asus A450L: Here are some info: cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic.efi.signed root=UUID=d1cccc17-9e70-4682-bb40-c3df0db22e36 ro quiet splash vt.handoff=7 ...
3
votes
0answers
89 views

Can't change brightness after disconnecting second monitor

When I boot up with 2 monitors, or when I connect the second monitor to my laptop, I can change brightness of the laptop screen in the usual sense. After disconnecting the second monitor, when I ...
1
vote
0answers
72 views

how do I turn off webcam brightness auto-adjust?

My Logitech webcamera adjusts brightness automatically and I don't like it. I wonder how I could turn this feature off from ubuntu. I downloaded v4l2ucp that seems to be a program to do just that, but ...
1
vote
2answers
121 views

Brightness wont change

I tried changing the brightness but it won't dim or brighten using keys or going under applications, it just stays the same.
1
vote
3answers
114 views

Brightness control command on “startup Applications” is not working

On "Startup Applications" utility I added my suitable brightness to be configured each time OS is launched. But it is not working at all. I am having to bear system's very high default brightness. ...
0
votes
1answer
70 views

Problems with the drivers, mouse and display

I have installed Ubuntu 14.04 alongside windows 8 in my laptop. These are the issues I am facing after the installation: 1- I am not able to change the brightness of the screen. 2- The cursor keeps ...
0
votes
1answer
79 views

set the screen brightness on startup

On Ubuntu 14.04 I tried to dim the screen brightness to 50% on each system start in /etc/rc.local with the line xbacklight -set 50% right before the line exit 0 Why does this not work? Is there a ...
1
vote
1answer
103 views

brightness not dimming on battery [duplicate]

On my Lenovo Yoga Pad 2 with Ubuntu 14.04 there is no option to dim the screen when in battery mode. There is one option "Dim screen to save power" but it doesn't seem to have any effect: How can ...
0
votes
1answer
299 views

How to adjust brightness on Lubuntu?

I can't adjust my screen brightness. Indeed, I can't find this option in my system parameters. I am using Lubuntu 12.04. Thank you for your time :)
2
votes
2answers
924 views

14.04 Asus g56jr Fn + Brightness control

I have recently installed Ubuntu on my new Asus G56Jr laptop. I noticed that despite all the other Fn+fX keys are working, the screen brightness does not. I have already tried editing the grub, as ...
1
vote
0answers
58 views

Brightness keys do not modify actual brightness

I am really new to linux, sorry if this is an easy question. I recently installed Ubuntu on an old macbook with next to no issues, except for the fact that the backlight does not respond to the ...
0
votes
0answers
74 views

Any way to enable dynamic/automatic brightness adjustment?

My Lenovo ThinkPad X201 Tablet has a very bright screen (400 nits!), which is good for when objects on the screen are dark (say a night scene in a movie), but it is of course very blinding when ...
0
votes
1answer
66 views

Ubuntu not starting after running script for brightness

I was trying to fix brightness on Ubuntu 14.04. So i tried what is mentioned here How do I set default display brightness? i ran the scripts as mentioned on the terminal. sudo apt-get install ...
0
votes
0answers
72 views

Acer Aspire 7741z : Function key adjust brightness but displays 10% in Ubuntu 14

On my Acer my brightness function key works, but the confirmation display only goes up to about 10%. Also the function key seems to be the only thing that will adjust the brightness. I cannot adjust ...
0
votes
0answers
10 views

I have to shut down and restart to adjust brightness

Occasionally when I turn on my laptop, I am unable to adjust the brightness. Once I shut down and restart Ubuntu, I can do this, but it is becoming more frequent and inconvenient.
0
votes
0answers
97 views

Ubuntu 14.04 second display brightness problem

Few days ago I have setupped Ubuntu 14.04. I'm using laptop and second monitor via HDMI cable. Now every about 1-2 minutes my second monitor's brightness changes (increase after that decrease and ...
0
votes
1answer
161 views

Fan under load doesn't go full speed on Acer laptop

On Ubuntu 14.04 when I do any system intensive task like gaming and when temperatures reach over 80C for CPU and 70C for GPU, fan doesn't spin as fast as it does in Windows 7 under even lower temps. ...
0
votes
0answers
24 views

screen brightness limited when using keyboard

When I use my laptop's keys to change brightness, I can only go to a certain max. See image: If I use the brightness setting (standard Brightness & Lock app), I can put it to max brightness ...
0
votes
1answer
1k views

When booting ubuntu, it states: thinkpad_acpi: Unsupported brightness interface

As the title says, when I boot my pc to Ubuntu (14.04), it says something like this: [ 23.025150] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@... And this ...
0
votes
0answers
21 views

Cannot Change Brightness in kde 4.9

So I installed kde on my linux ubuntu 12.04.4 lts kernel 3.11 and I cannot use the brightness keys to change the brightness. I can use the echo 20 | sudo tee ...
0
votes
1answer
369 views

Monitor not turning off in 14.04

I have a freshly installed ubuntu 14.04. In settings "Brightness and locking" I had the following Settings: Turn monitor off after "10 Minutes" Locking: On Monitor locking after "5 ...
1
vote
1answer
42 views

What to choose as application to launch Brightness-Controller?

I'm new in *ubuntu. I'm using lubuntu 14.04. When I'm trying to download Brightness Controller it is saying This link needs to be open with an application. Which application to choose? Actually ...
0
votes
0answers
82 views

Turn off screen when inactive ONLY on battery power

In the "Brightness and Lock" settings there is a nice feature to automatically turn off the screen after a period of inactivity, but I only want to do this on battery power. When plugged in, I always ...
1
vote
0answers
334 views

issues with ASUS S301L ultrabooks

I just like to tell you what still is a Problem in Ubuntu 14.04 and should be solved for a nice experience of this distribution. Intel open source Graphics issues (proprietary) When attaching ...
0
votes
2answers
108 views

Nvidia Drivers break several hot-keys on Ubuntu 14.04

I have a ThinkPad W530, which has Optimus. When I am running the NVidia card with Nouveau or the Intel integrated card with Intel drivers, the Microphone mute, ThinkVantage key, and brightness works ...
0
votes
0answers
119 views

Restore laptop screen brightness when unlocking screen

My config is the following: - Ubuntu 14.04 - An ASUS laptop - An additional LCD screen connected through VGA I control my additional LCD screen's brightness with dedicated controls located directly ...
0
votes
0answers
48 views

Brightness not changing Dell 15r SE and ubuntu 12.04

With my current laptop I can't change my brightness anymore I tried xbacklight -set 50 (nothing happened) and also changed this line grub_cmdline_linux_default= "quiet splash" to ...
1
vote
2answers
574 views

How do I get brightness controls working on a Sony VAIO Fit 15E?

I have a dual boot with Ubuntu 14.04 and Windows, and I have a problem with brightness. When I increase brightness to 1 and I reboot the computer, it has come to be at maximum brightness. I've tried ...
-1
votes
1answer
81 views

Brightness Problem in Ubuntu 14.04

whenever i turn on ubuntu brightness increases to 100% always. i manually have to lower it to somewhat around 60%.how to set it permanently to your choice,so that whenever i turn on ubuntu it remains ...
0
votes
1answer
157 views

Brightness Resets on Boot/Reboot in Ubuntu 14.04

As the question statement explains itself, I'm on Ubuntu 14.04 and my screen brightness is reset to maximum after every boot, no matter how many times I reset. I applied the solution provided here ...
0
votes
0answers
37 views

Every time to boot my system, the brightness get reset to 100%

Earlier , I couldn't even change the screen brightness by any means(Fn keys and Brightness settings).Then I came across a solution , which required me to edit the following lines ...
0
votes
1answer
177 views

How to set automatic brightness in macbook pro?

I have just installes ubuntu 14.04 in my macbook pro, and I already configure all but the keyboard and screen brightness. In OS X, the brightness is controled automatically, I want to know if this is ...
0
votes
0answers
91 views

Max Brightness in ubuntu lower when compared to windows

I've installed Ubuntu 14.04 on my (new) ThinkPad Edge330. Everything worked quite well so far. I've noticed that the screen wasn't that bright and was a bit disappointed of the ThinkPad, but then I ...
2
votes
2answers
2k 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 ...