Questions related to screen brightness.

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1answer
171 views

Brightness Control : Asus X453MA : Xubuntu 14.04

I cannot adjust the screen brightness using the Fn keys. I have scoured the net to find a solution and so far this is what I have : I've tried creating/editing ...
9
votes
3answers
6k views

Ubuntu 14.04 Brightness issue with nvidia Quadro

I recently upgraded from Ubuntu 13.10 to 14.04. Everything is fine, except the brightness of my laptop screen. When I change the brightness the screen simply does not respond. I figured this was a ...
0
votes
1answer
448 views

How to stop screen from dimming when power cable is unplugged?

On HP Pavilion with Ubu 14.04 LTS, screen automatically dims when power cable is unplugged. I sometimes want to have maximum brightness, even when power cable is unplugged, for personal reasons. How ...
3
votes
0answers
227 views

Brightness Ubuntu vs. Kubuntu and Xubuntu

On Kubuntu and Xubuntu the brightness of my monitor goes down to zero (i.e. the backlight got switched off). On Ubuntu this does not happen, the minimux brightness is still with backlight on and ...
0
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0answers
34 views

Unable to change brightness on lock sccreen

When at the lock screen, I am unable to adjust the brightness. This is particularly annoying if the screen is completely off (to save battery) and then locks automatically. You then have a black ...
0
votes
1answer
40 views

How to switch the screen illumination off and continue typing? [duplicate]

I can switch the screen illumination manually off by pressing Fn+F6 on my laptop keyboard. This is the same as automatically switching it off on idle as it can be set in the power management. The ...
0
votes
1answer
500 views

FGLRX drivers boots without backlight

Fglrx Not working after install (I know) HW : Asus K72j with AMD HD5470 laptop So, after installing the ATI drivers fglrx on my ASUS K72J laptop via CL my screen booted black. So at first I thought ...
1
vote
0answers
81 views

How to change screen brightness from commandline on Asus X453?

I'm using the Fluxbox window manager on Ubuntu 12.04. I recently got my desktop into a strange situation, and I'm not sure how! The situation was this: If I close the laptop screen lid and then ...
0
votes
0answers
32 views

I no longer have access to the system menu

I was trying to change my brightness and issued a command sudo setpci -s 00:02.0 F4.B=80 Later I installed xbacklight using the following command sudo apt-get install xbacklight Then changing my ...
0
votes
0answers
16 views

Prevent OS from setting 0 brightness

I'm using ubuntu 14.04 and on pressing "brightness minus" key, the brightness of the screen does decrease but, if I keel holding/pressing the button,the brightness decreases all the way to zero and ...
0
votes
1answer
93 views

Ubuntu brightness max_level

Notebook is Lenovo IdeaPad Z500. Ubuntu 14.04 LTS with latest updates. When I first time clicked on F12 (which change brightness up by default) light become lower, but not 0 (I see the text, but it's ...
24
votes
5answers
16k views

Is there a software utility to adjust screen gamma/brightness/contrast?

I use to work at night and it is eye-hurting to watch at lightbulb-bright screens (I've got two - laptop's built-in panel and an external 18-inch CRT) in a dark environment. So I adjust my screens to ...
0
votes
1answer
111 views

is there a command to turn on keyboard lights?

I just updated the BIOS of my friend's Dell Latitude E6420 (from A08 to A22) and found out that the keyboard has a back light! There is a FN+Key which toggles thought the scales of brightness, maybe ...
4
votes
6answers
11k views

Brightness control doesn't seem to work on a Toshiba Satellite M115 laptop

I have Ubuntu 12.04 LTS on a Toshiba Satellite M115 laptop. The brightness control doesn't seem to work with the "brightness and lock" setting or fn+f6 and fn+f7 (which usually works in Windows). How ...
0
votes
1answer
165 views

Can't Adjust Brightness In ASUS X401U

i have a problem with my Ubuntu 14.04. I installed it on my ASUS X401U and i can't adjust the screen brightness trough the Fn. key or system setting. i have tried some way like edit the grub file. but ...
0
votes
0answers
21 views

No brigtness control on Toshiba Satellite running ubuntu 14.04 LTS [duplicate]

running ubuntu 14.04 lts on a toshiba satellite I have no control of bightness. How can I fix this?
0
votes
2answers
840 views

I can not increase or decrease the brightness of my screen on UBUNTU 15.10 [duplicate]

just wondering if anybody knows what's the problem. I use the brightness bar control with my keyboard or in options, the computer shows me the brightness bar increasing or decreasing but the screen is ...
0
votes
0answers
188 views

Brightness control not working FN keys ubuntu 14.04/15.10

I have a toshiba laptop C855D-124 with an AMD/ATI, and since i installed the graphic card drivers that i can't adjust the brightness.... the FN key works with the other options, just not the ...
1
vote
2answers
2k 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 ...
11
votes
7answers
31k 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 ...
5
votes
5answers
7k views

Can't adjust brightness on my MSI VR420 laptop

Using every method possible I'm unable to change my laptop brightness.. It's stuck on super max brightness.. Using the slider in the "screens" window int he control panel doesnt do anything, and using ...
1
vote
1answer
1k views

Asus eeePC - Screen Brightness Issue

I have ASUS 1015CX Netbook on which I have installed Ubuntu 12.04LTS. All seem to work fine however there is an issue with brightness settings; changing the brightness (both through settings and with ...
0
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0answers
42 views

Problem with backlight

I always have problems with brightness control in my computer,(I have intel graphics HD 400) Until yesterday, I was running ubuntu 15.04 without problem at all. I just have to modify grub with these ...
1
vote
0answers
41 views

Screen Brightness not increassing after using "xrandr --output eDP1 1.0

Earlier I was not able to decrease screen brightness from keyboard (It was at its maximum), then I tried: xrandr --output eDP1 --brightness 0.5 Now screen is sufficiently dim now, but now at times ...
0
votes
0answers
36 views

Windows & GRUB Screen not displaying

I have a Windows-Ubuntu dual boot that worked fine till a few days ago. I upgraded to Windows 10 last month & the dual boot worked fine after that. Suddenly, the GRUB screen & Windows OS (when ...
16
votes
4answers
22k views

How do you change brightness, color and sharpness from command line?

I am controlling my PC with SSH and scripting. How can i change the brightness, color and sharpness from command line? Try 1: failed $ sudo redshift -t 5000:5000 -g .5 Cannot list GNOME panel ...
0
votes
0answers
14 views

Macbook brightness using WRONG folder

I am running ubuntu 14.04 with macbook pro mid 2012 Brightness is not working using the function keys. I'm pretty new at Linux, but I know why it is not working, just not how to fix it. #Under ...
2
votes
1answer
36 views

Ubuntu 14.04 brightness preference option

The lighting preference option seems to allow increased lighting adjustment but after re-setting the screen darkens! When I check the setting it has returned to the previous position. Is there a ...
0
votes
0answers
38 views

Brightness is reduced if booted unplugged,but doesnt regain default if plugged in . increasing brightness never makes look default?

when my laptop boots up,if its not plugged in,then the brightness is much less than default.using the command below I increase (>1) but that doesnt look good. command :: xrandr --output LVDS1 ...
-1
votes
1answer
78 views

Ubutnu Screen Flickering after Changing Brightness

I have an Acer Aspire 5742G latop with Ubuntu 12.04.5 LTS. Firstly I had a problem with the brightness (i couldn't change it) but afer I changed GRUB_CMDLINE_LINUX_DEFAULT to ...
0
votes
0answers
22 views

Set monitor backlight to minimum level during ubuntu boot

Is it possible to change the default brightness level during boot to the minimum level available.
0
votes
0answers
37 views

Possibility to Limit Processor Utilization by %?

This question refers to the feature in Windows Power Settings that has 2 options: Minimum processor utilization: 0% Maximum processor utilization: 100% Since the default Power Options in Ubuntu ...
7
votes
11answers
21k views

Screen Brightness not adjustable for Acer Aspire S3

First of all, thank you very much for providing this useful forum. Too bad for me, there is no support for the Acer Aspire S3 yet (just came out in October) Short Description of the Problem: I cannot ...
0
votes
0answers
63 views

Screen brightness resets when restarting Ubuntu

Every time I start Ubuntu 14.04 the screen brightness resets to default. I would like to keep it at the lowest, yet it keeps changing to highest when I restart. This is a problem that have long ...
1
vote
1answer
132 views

Desktop monitor brightness adjusting

Is it possible to adjust desktop monitor brightness like on laptops? Yes all desktop monitors have separate menu for it. But is it possible to change this to something like Winkey+(F1..F12)? ...
0
votes
0answers
40 views

Why Compiz Fusion doesn't work well since Ubuntu 12.04?

Since Ubuntu 12.04 compiz fusion doesn't work well. I don't know why when i active "Cube Reflection Deformation" my screen turns dark. like this: How do I change the brightness in Compiz? and when i ...
1
vote
1answer
2k 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
0
votes
0answers
38 views

My ubuntu not powering off version 14.04 hp laptop

I am having hp laptop. i installed Ubuntu 14.04. The problem is it is not shutting down. i need to press power button to shut down. i tried almost all steps like changing /etc/default/grub, installing ...
2
votes
1answer
3k views

Brightness setting not working on Xubuntu 15.04 ( vivid vervet)

I recently upgraded from xubuntu 14.04 to 14.10 and then to 15.04 on Lenovo z580. I used to control brightness on 14.04 using xbacklight from command line. Now its not working. 15.04 also has a ...
0
votes
5answers
1k views

The dreaded Brightness issue (Fn keys + Max brightness)

EDIT: Updating to Ubuntu 13.10 solved this issue for me out of the box. I'm trying to get some control over the brightness of my Samsung QX411 (Integrated Intel and discrete Nvidia, though Ubuntu ...
2
votes
3answers
745 views

Brightness keys no longer work

My Fn+F8 and Fn+F9 keys to change the screen's brightness appear to no longer work on my Thinkpad laptop. # ls /sys/class/backlight/ thinkpad_screen Some guide told me to make this: # cat ...
0
votes
0answers
76 views

volume and brightness notifications not working but notify-send do

There is no notification while changing volume and brightness.Volume indicator applet is working fine. notify-send is also working. I think this happened after installing Theme Configuration app(to ...
1
vote
1answer
968 views

Brightness works with Function (FN) Keys in Lubuntu 12.10 but not Ubuntu 12.10

I have a Toshiba Portege R930 laptop and installed Lubuntu 12.10 through Wubi and then installed the Ubuntu-Desktop package afterwards. When in Lubuntu, pressing FN+F6 and FN+F7 lowers and increases ...
1
vote
0answers
216 views

Special Function Keys are not working in Ubuntu 14.0.4.2 LTS

Volume (+/-/Mute), Brightness (up/down), Disable Webcam, Mute Microphone and Projector Function keys are not working (when used through laptop keyboard) but Next, Pause/Play and Previous keys are ...
3
votes
2answers
9k views

Fn-keys stopped working on a Lenovo Thinkpad Edge

I'm running 12.04 on a Lenovo ThinkPad Edge. I'm having these possibly related issues with things that worked perfectly when I installed Ubuntu: Most of the Fn-keys worked seamlessly after I freshly ...
1
vote
2answers
1k views

Lenovo L430 malefunction brightness control 13.04

I use a Lenovo L430. Unfortunately after updating to 13.04 the brightness control does not work any more. Hitting Fn + F8/F9 the popup appears but it is changing only one step but the brightness ...
3
votes
2answers
51 views

Forcing brightness increase

I'm a desktop user, and since my LCD screen died I have to use an old CRT screen that has some issues. I set its both contrast and brightess settings to 100%, but there's some stuff I still couldn't ...
0
votes
1answer
76 views

Brightness not working

There are many answers out there for earlier versions but I did not have this problem before 15.04 and I know too little to judge, but I am guessing when I deduce that this problem is thus linked to ...
2
votes
2answers
1k views

Change brightness Vaio FZ

I can't change the brightness on my Vaio VGN-FZ340E. There isn't even a slider on the screens window. The only way I've found to do it is to use smartdimmer throught the command line, however this is ...
0
votes
2answers
263 views

I am unable to change brightness of my laptop

i am new to ubuntu and using Ubuntu 14.04 and installed nvidia graphics driver in my sony vaio E-series VpCEH25en but I cant change the brightness.