Questions related to screen brightness.

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Ubuntu 14.04 won't boot after trying to fix brightness issue with Intel card

I just installed the latest version of Ubuntu on my laptop with pre-installed windows 8. So it's a dual boot and everything worked just fine. Then I found out that the brightness wouldn't change in ...
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40 views

Screen goes blank after less than a minute of locking

I am using Ubuntu 14.0.4 LTS Desktop. I pressed CTRL+ALT+L to lock my screen. The screen did lock. After several 10 seconds, the screen goes blank. I checked on my brightness&lock settings, it ...
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92 views

volume and brightness keys not working: xfce

I recently installed Ubuntu 14.04 and when I was working with Unity, everything was fine but then i switched of xfce and now the keyboard shortcuts for brightness and volume control are not working. ...
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0answers
107 views

Disable brightness and keyboard back-light at start-up?

I'm new with Linux and I have an issue that I have being researching and have not been able to find a solution so far. I was wondering if any help can be given. I have an Asus Q500A with Win-8 and ...
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0answers
285 views

Ubuntu 14.04 + Bumblebee, Unable to control Brightness and have Bumblebee working at the same time

I'm current running Ubuntu 14.04 with a GTX 780m gpu on my laptop and using nvidia-331 drivers with bumblebee. I was unable to control the brightness of my screen, but then I decided to follow some ...
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28 views

Brightness keys +/- do not repeat

On my system, I was obliged to create an /usr/share/X11/xorg.conf.d/20-intel.conf file to use the Intel interface for brightness control with the following content: Section "Device" ...
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291 views

Brightness control issue - /sys/class/backlight empty

My laptop has Intel(R) Core(TM) i5-4200U CPU @ 1.60GHz, 4G RAM, Haswell-ULT Integrated Graphics Controller Only thing unusual is when I installed Ubuntu 14.04 LTS, I edited grub as ...
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39 views

Ubuntu 12.04 - backlight adjustment

I was trying to look at solutions that would enable me to adjust the backlight intensity using the function buttons. I tried editing the grub file in /etc/default/grub but that didn't help. I ...
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47 views

Nouveau driver has low brightness/contrast

Why nouveau looks with less brightness and/or contrast than nvidia proprietary driver? I use Ubuntu 14.04 in a desktop with a Nvidia GeForce GT 640. I had this problem in the past too with other ...
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1answer
121 views

Brightness is reset to maximum after waking up from suspend or lock screen

This question is somewhat related to this question: Brightness is reset to Maximum on every Restart Basically, I modified /etc/rc.local to set the brightness, as detailed in this answer, so on ...
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1answer
196 views

fglrx: dim screen until brightness key pressed

I reported this at https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/1360218 three weeks ago but it is still unassigned and no one has commented on it but myself. It is a Lenovo G50-45 ...
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61 views

contrast/gamma different than in nvidia-settings

My Ubuntu displays less bright tones (like darker greys) much darker as they should, gamma and/or brightness seem to be messed up. When I start nvidia-settings, the colors instantly change to ...
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2answers
95 views

Brightness Problem

Hello there Linux user I am a new user and I don't know how to turn down my brightness of my laptop when I change it with the keys it show on the screen going down but the screen is not dimming I ...
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0answers
63 views

Control brightness on Satellite Pro C845

I have a Toshiba Satellite Pro C845 con Intel Core i5 and I can use the function keys to mute sound or increase and decrease, but the brightnes keys does not work, to decrease is fn + f2 and to ...
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1answer
157 views

fn key for setting brightness in ubuntu 14.04 lts is NOT working for Asus X550LD

I am facing the above problem only for Brightness Control. Rest all the Controls with fn key are working. I dont want to create new Shortcuts like CTRL+F5 or CTRL+F6. I want that it should happen with ...
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0answers
88 views

How to disable dynamic contrast in Kubuntu?

My environment is kubuntu 14.04 and graphic card is nvidia GTX 560. The problem is with dynamic contrast changes. For example when I open "bright" webpages it looks like monitor is brightening up as ...
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0answers
67 views

How can I adjust screen brightness on Toshiba C665-X5010?

I am using Toshiba C665-X5010 laptop having NVIDIA GeForce 315M GPU. I have installed Ubuntu 14.04 recently and I couldn't adjust my screen brightness. Please help me.
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0answers
82 views

Screen Resolution for 14.04 + display lists only 1024x768

I am using Ubuntu 14.04 on dell 1749 laptop, do not know what happened and I am not able to control brightness, and I can not in choose other resolutions than 1024x768. Processor: i3 RAM: 6GB OS ...
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1answer
76 views

Upgraded from 12.04 to 14.04 and screen brightness can not be decreased

The brightness remains maximum always. I am using ACER Aspire E1-572, and its brightness cannot be changed. I tried: echo -n 100 > /proc/acpi/video/DVGA/LCD/brightness echo -n 100 > ...
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0answers
36 views

Set Brightness to 0 when lid closes

is there a way of setting the brightness level to 0 or blanking the screen when I close my lid (without suspending the system). I just prefer it that way, since I listen to audiobooks while driving ...
0
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1answer
58 views

How to set bright at maximum permanently (I've already got a solution, do anyone have a better one?)

I have to reinstall ubuntu in my Samsung N210 laptop, and now it won't let me set the brightness by hand. This seems to be something related to my BIOS but after looking for it, there's no new release ...
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4answers
175 views

How do I get brightness control working on an HP 655?

please I installed Ubuntu 14.04.1 on my hp 655 alongside windows 8.1 but my brightness control doesn't work although it does work on my windows platform.
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1answer
57 views

Brightness change freezes Ubuntu with Noveau and Nvidia drivers [duplicate]

Both Nvidia and Noveau were working fine before my bios update and now they both crash when I change the brightness. Integrated still works fine with brightness and I've tried several Nvidia drivers ...
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1answer
89 views

How to adjust Screen brightness of Acer Aspire 573z?

I have tried many thing given on internet and also on Ubuntu but nothing works.
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0answers
54 views

I removed Windows 8 and installed Ubuntu 14.04, now my fn keys to manage brightness and volume don't work and I can't boot into BIOS

To clarify, this isn't a dual-boot, I just have Ubuntu now. My FN keys are no longer working on my ASUS K55n, this includes changing my brightness and volume. I've already tried editing the GRUB ...
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0answers
70 views

Keyboard Backligth is set to Maximum in every reboot

At every reboot my screen backlight and my keyboard backlight were set up to maximum level on every reboot. Reading this article: How do I set default display brightness? i've solved the problem ...
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120 views

Ubuntu 14.04 LTS Screen Brightness ASUS G750JS

I got a new ASUS G750JS at the beginning of the summer and set it up for a Windows 8.1 / Ubuntu 14.04 LTS dual boot. Minus discovering that the Windows 8 boot manager is completely broken, I had ...
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1answer
97 views

Changing the brightness on the Lenovo T410

I can't change the brightness on my lenovo T410 laptop. I tried changing it from the system settings and using fn+Home, but both didn't work.
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0answers
269 views

Function keys not working on Toshiba C-50-B

I purchased a Toshiba C-50-B-P-0010 about a week back, it did not come pre-installed with any OS. I have installed Ubuntu 14.04. The function keys are not responding properly. If i press F3 which is ...
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0answers
76 views

Can't adjust screen brightness ((

Can't adjust screen brightness from anywhere. Nor by specific buttons on the laptop keyboard, nor by setting in "brightness and lock" I've tried to configure the grub file like it mentioned in a lot ...
0
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1answer
263 views

Issues on ASUS X550LC (after installing ubuntu)

I've installed ubuntu 14.04 on my ASUS X550LC. Here I've found some issue: Bluetooth is not working. Brightness is going 100% after every reboot. Brightness and network controlling shortcut key is ...
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0answers
48 views

How to add brightness key to dconf

I recently downloaded Ubuntu 14.04 and did a clean installation. I noticed that Ubuntu 14.04 does not store screen brightness settings. Who can I add a value to dconf to store brightness settings. I ...
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0answers
13 views

Ubuntu 14.04 Brightness keeps going to 100% [duplicate]

I recently installed Ubuntu 14.04 for the first time. Although I have set brightness a million times, every time I start the computer, it goes to maximum again. If I restart the computer it remembers ...
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2answers
172 views

Brightness Problem

I have a lenovo z570 laptop. I have currently switched to Ubuntu 14.04. I am unable to control the brightness and it is always set to high. Please help. I have searched for the problem but none of ...
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1answer
84 views

Is there a convenient way to change the brightness at night in Ubuntu?

I know the settings menu, but is there some more convenient way (maybe with an addon)?
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0answers
50 views

Ubuntu 14.04 max brightness isn't the max brightness

I am experiencing an issue with the brightness on my laptop (Sony Vaio vpcf21z1e). This issue has been occurring since Ubuntu 12.04. Essentially when my laptop boots into Ubuntu the brightness is set ...
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2answers
79 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": ...
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1answer
163 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 ...
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1answer
273 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 ...
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2answers
51 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. ...
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0answers
44 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?
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4answers
643 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 ...
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1answer
75 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 ...
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0answers
137 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 ...
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0answers
29 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 ...
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1answer
34 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 ...
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1answer
95 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 ...
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2answers
63 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?
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0answers
93 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 ...
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1answer
131 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 ...