Questions related to screen brightness.

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1answer
24 views

Automatic screen brightness on Ubuntu 14.10 not working right, manual controls not working at all

My Samsung NP740 has been running Ubuntu fine for 18 months. I did an upgrade to 14.10 and the screen brightness controls stopped working correctly. I did a wipe and fresh install and I still have the ...
0
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0answers
32 views

Carbon X1 and Ubuntu 14.10 issues - hibernation, key mapping, brightness and volume keys

I got a Thinkpad Carbon X1 (2nd Gen) with Ubuntu 14.10 and I have a few issues/questions: 1. hibernation (Edit - ...
2
votes
2answers
41 views

Ubuntu 14.04 LTS: FN-Brightness Key Stopped Working

Hello dear Ubuntu Community, After i installed some Ubuntu Updates on my PC,my FN-Key stopped working. (But i can still change it in the System settings. I tried many ways to fix it trough the ...
1
vote
1answer
20 views

Some Fn Keys not working after BIOS upgrade (ASUS X401U)

Before upgrading BIOS from version 204, all Fn Keys were working properly. After successful upgrade via EasyFlash to version 313 of my ASUS X401U some Fn keys are not working anymore which are: Fn + ...
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votes
1answer
55 views

Brightness keys not working and no obvious interface for adjustment either

New to Ubuntu and so far pretty happy with it but one niggle is the brightness controls do not seem to work. I have looked at fixes on here + google but nothing seems to get it right. Mostly effecting ...
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0answers
38 views

How do I change the default brightness on my computer?

Every time I turn on my computer the brightness is automatically set to the highest possible setting. Is there a way I can change this and make the default brightness setting darker?
0
votes
1answer
67 views

Changing screen Brightness with a script

As you may know, screen brightness drains battery, that's why it is considered a big problem for laptops (at least for me). I can change the screen brightness but every time ubuntu boots up I will ...
0
votes
1answer
28 views

Something weird is happening with Fn keys

I have an Asus N56JR with NVIDIA GeForce 760M. I am running Ubuntu 14.04 LTS. There are a few things wrong with my Fn keys. For one the brightness (controlled with Fn+F5 and Fn+F6) do not respond at ...
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0answers
21 views

Lower Minimum Screen Brightness

By using /sys/class/backlight/ the screen brightness can go lower than when using the function keys to do so. Is there a way to change the minimum level used by the function key method, rather than ...
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0answers
46 views

FNKey Brightness - Change Behaviour

When I change my screen brightness using FN keys in Unity or other DEs, the brightness changes instantly. It is very sudden. But when I use xbrightness -dec 10 the change is more soften. Is there any ...
0
votes
1answer
64 views

Unable to change brightness using after root access

Case-1 Recently I read a question(Brightness is reset to Maximum on every Restart). Then I opened up my terminal and typed out following command- sudo echo 200 > ...
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0answers
26 views

Intel video setting always max nvidia

Every time I restart my computer brightness goes to max. Does anybody have idea how to brightness be the same as I left it before shutting down.
0
votes
1answer
59 views

Lenovo Thinkpad L Brightness Level Intervals

I'm using Ubuntu 14.04. Everything worked out of the box on my L440. The only thing that bothered me was the brightness levels. I can change it by pressing fn + F5 or F6, but there are only a total of ...
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0answers
23 views

lenevo g580 touchpad sometimes stop responding Ubuntu 14.04 64bit

My laptop touchpad won't work and only external mouse is working any way to install drivers or something that can resolve this issue ? Somebody would like to give auto script or something to make it ...
5
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0answers
594 views

Can't control laptop screen brightness after upgrading to 14.10 [closed]

My brightness is stuck at 100% when I have the power cord plugged in, and using the hot keys to change the brightness, or changing the brightness through the system brightness app does nothing until I ...
0
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0answers
76 views

acpi_backlight=vendor not working

I installed Ubuntu 14.04.1 and the screen just isn't bright enough. I've read on the forums that adding acpi_backlight=vendor to the grub will make your screen brighter. After updating the grub and ...
2
votes
1answer
68 views

Toshiba u840: Hotkeys don't work after upgrading to 14.10

I've already tried the solutions presented here: Upgraded to 14.10, brightness control quit working - Intel HD 4400 and here: Brightness keys don't work on a Toshiba Satellite t110 with no ...
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votes
2answers
129 views

Asus N56JR laptop, can't change screen Brightness using Function Keys

I have an Asus N56JR laptop with Nvidia GeForce GTX 760M graphics card, running Ubuntu 14.04 LTS. When I check what graphics I use for brightness it says "Intel". I have tried using commands to ...
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0answers
49 views

Brigthness Display and Power Management

Please help. I'm using Ubuntu Gnome 14.04LTS, I need to tweak my Brightness Display to consume long battery life. I want to have 50% Brightness Display when I'm Unplug and 100% Brightness Display when ...
0
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0answers
40 views

Brightness and Power management

I'm using Ubuntu Gnome 14.04LTS. I want to tweak my Brightness setting to consume long battery life.I want to have 100% brightness when Im on Plug and 50% brightness when Unplug However when I go to ...
3
votes
2answers
519 views

Hot keys brigtness issues with Ubuntu 14.10 in Acer Aspire 5755

I have a Acer Aspire 5755 with Intel video graphic, on Ubuntu 14.04, the combination Fn+←/→(Right/left) arrows can increase/decrease the brightness screen. Works fine on unity and with a ...
0
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0answers
31 views

Acer Aspire 4820t brightness fn-keys skip steps

My acer adjusts brightness 3 steps at a time. I've used solutions from: Why does my Thinkpad brightness control skip steps? I've disabled the video driver from adjusting brightness: sudo sh -c 'echo ...
0
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2answers
80 views

How to write a script which automatically presses `Fn + F3` button on my keyboard

I am struggling with screen brightness reset issues . It resets to 100% on every reboot. I have tried searching for solutions but none of them worked[including xbacklight ]. Since I can change ...
1
vote
1answer
165 views

Fn keys for brightness not working on Asus X551MAV­-SX366GB

Brightness should be controlled by pressing Fn + F5 and Fn + F6. Nothing happens when I press these keys. My computer is a Asus X551MAV­-SX366GB and I'm using Lubuntu 14.04
4
votes
1answer
293 views

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...
1
vote
4answers
173 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, ...
0
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0answers
39 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, ...
0
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0answers
48 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 ...
0
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0answers
46 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 ...
0
votes
1answer
101 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 ...
0
votes
1answer
114 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 ...
0
votes
1answer
42 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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0answers
35 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 ...
1
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0answers
45 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 ...
0
votes
1answer
143 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 ...
0
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0answers
37 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 ...
1
vote
1answer
48 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 ...
0
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0answers
47 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
31 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 ...
0
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0answers
76 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. ...
1
vote
0answers
88 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 ...
1
vote
0answers
265 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 ...
0
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0answers
25 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" ...
0
votes
0answers
236 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
38 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 ...
0
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0answers
39 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 ...
1
vote
1answer
98 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
vote
1answer
140 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
41 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 ...
0
votes
2answers
93 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 ...