Questions related to screen brightness.

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Unable to change screen brightness with hotkeys on Ubuntu 14.10

Just upgraded to Ubuntu 14.10, and now my brightness keys aren't working. Is there a fix for this? I suspect that Linux kernel 3.16 is the culprit...
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4answers
44 views

how to adjust screen brightness in ubuntu 14.04?

I'm new to Ubuntu, I am unable to alter the screen brightness in my laptop, it is always 100%. Laptop is Acer Aspire 5740, Graphics/Chipset/VGA all are by Intel. The Laptop has a keyboard shortcut, ...
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20 views

Where is the laptop brightness script located?

Online I found the command: echo 1 > /sys/class/backlight/acpi_video0/brightness to set my screen brightness to the lowest possible value, currently I am grepping my entire disk for that path, ...
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21 views

How do I retain screen brightness settings after a reboot on Ubuntu 14.04?

I would like to find a way to get Ubuntu to retain the screen brightness settings on my laptop, so that after I reboot, the brightness will not go back up too 100%. Is there a way to do this? Any and ...
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27 views

Function buttons not working properly on Ubuntu (HP Sleekbook)

I have a few problems regarding my function buttons, so far the only function button working is the volume, it works fine. But I have some issues with the others. Brightness button doesn't work ...
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1answer
54 views

Cannot change screen brightness on Ubuntu 14.04 on Lenovo G580

I installed ubuntu 14.04 on Lenovo G580. My screen brightness remains at maximum(hotkeys work). I followed a previous post to modify grub: GRUB_CMDLINE_LINUX="" to this: GRUB_CMDLINE_LINUX="quiet ...
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1answer
45 views

Fn keys can't adjust brightness MATE desktop

I just installed Ubuntu 14.04 and removed Unity and installed MATE. Now, the Fn keys on my keyboard can't adjust brightness. Here's the thing that makes it extra extr confusing: my brightness worked ...
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1answer
30 views

Brightness was working but I reinstalled drivers

In the morning only buttons didn't work, now even through the settings. I did few updates today and as a result I had to reinstall drivers. Now I cannot change my brightness in any way.. 14.04 nvidia ...
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16 views

Brightness wont turn down?

I've had a few operating systems on my laptop in the past couple of months including alot of Ubuntu based ones. One thing Ive had a problem with in all the Ubuntu based systems is that I can't turn ...
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0answers
39 views

Brightness controls buntu 14.04 / Dell Inspiron

My laptop keyboard brightness controls do not work after the screen has been turned off by the power management - logging of and back on brings back the brightness controls. Similar behaviour occurs ...
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1answer
73 views

Why is Ubuntu 14.04 running slow on my Asus Zenbook UX302 LG? + brightness issue

It's a fresh install alongside Windows 8.1. I have already tried to modify the grub file by adding acpi=off but it doesn't speed up things. The machine has an i7-4500U processor, 8 GB of RAM and ...
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0answers
14 views

Apple Cinema LED Display: using regular brightness controls?

I have a Dell Latitude E6430 laptop, running Ubuntu 14.04, connected to a 27" Apple Cinema LED Display (which works fine). By tweaking the appledisplay kernel module a little bit, I can even get ...
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0answers
25 views

Screen brightness Samsung R519 with kubuntu

Kubuntu recognizes the Fn + up/down but it only changes the brightness when it goes from 85% to 71% or viceversa. I want to know an easy way to change the screen brightness. I don't care if the method ...
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0answers
37 views

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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0answers
22 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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0answers
48 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
58 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
160 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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0answers
20 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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0answers
135 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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0answers
37 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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0answers
30 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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0answers
50 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 ...
1
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1answer
84 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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0answers
18 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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1answer
67 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
32 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
90 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
61 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
50 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
58 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
55 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
27 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 ...
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1answer
50 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
127 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
48 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
60 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
41 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
43 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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0answers
97 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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0answers
53 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
138 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
54 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
199 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
37 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
11 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
129 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
73 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
43 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
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": ...