Questions related to screen brightness.

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1answer
136 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)? ...
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150 views

Brightness will not change on Ideapad p400

I recently installed Ubuntu 14 (can't remember which release) to dual boot with Windows 10 on my Lenovo IdeaPad p400 Touch. It gave me the option to upgrade to 15.04, which I decided to do. After ...
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56 views

Hardware brightness control on Asus R556LB

I have an Asus R556LB. All my keys but the brightness control work out of the box on the 4.1.2 kernel. I tried booting the kernel with the following extra options acpi_osi= acpi_backlight=vendor ...
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1answer
59 views

At login, brightness goes to minimum, fastly goes back to maximum and didn't change anymore

I updated my ubuntu to 15:04 , but after que I can no longer reduce brightness. Even when I try with FN keys, the indicator varies, but the brightness doesn't change. I've tried many ways to change ...
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1answer
57 views

Why cant I install brightness-controller

I have been having problems with adjusting the brightness.....it is at max (when I look at it, it is at max in the settings. By the way, I cant control it at all with the keyboard combination.) I ...
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1answer
357 views

backlight trouble xubuntu lenovo ideapad 100

Brightness control is reversed. When I press the brightness control keys the increase button will make it dim and visa versa. The indicator for the brightness on display is also backwards, and before ...
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41 views

Event handler even more low-level than acpid?

Ubuntu 14.04 Netboot didn't support my laptop's display brightness controls out of the box. So first thing I did was fire up evtest to check if the correct keycodes (KEY_BRIGHTNESSUP and ...
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20 views

Cant disable touchpad

I am using the latest version of ubuntu and cant disable the touchbad using "fn+F9". F9 has the touchpad symbol and it is crossed out so surely that's the right one. Brightness wont change either with ...
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59 views

Editing system settings not working

So this happened after I tried to plug an external monitor into a 10,1 Macbook Pro running Ubuntu 14.04 64-bit. I first started playing with nvidia-settings without success and then I tried to ...
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0answers
59 views

Brightness is set to 0 and I'm not able to change it

I changed my brightness to 0 and kept the laptop running and after few hours battery died and the laptop was turned off. Now whenever I turn on the computer after the splash screen goes dark. If I ...
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83 views

ACPI special keys all have the same code

I've ran into the problem of my brightness keys (and everything but my volume keys) not working. I've been following this guide on how to fix them: https://help.ubuntu.com/community/LaptopSpecialKeys ...
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311 views

Ubuntu 15.04: unknown display & can't change brightness

I have Ubuntu 15.04 on my Toshiba Satellite A500-14H with ATI Mobility Radeon HD 4650. First Problem: When I go to settings - display devices (hardwares), it tells me "Unknown Display". I get the ...
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2answers
227 views

Is there an App that can make my desktop dimmer

I used an app in Windows 7, I think called dimmer to make the screen change its contrast settings so I could dim it lower than the controls of the PC defaults such as function key or the power options ...
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1answer
52 views

control brightness on pc

I want to control brightness on pc. There isn't any setting for brightness. I can control brightness on monitor but I want to change it more. Screen is too bright. I also want something that change ...
2
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1answer
214 views

Laptop backlight sets to maximum at startup (Xubuntu 15.04)

I've tried many solutions I've found on the Net, but had no luck with them: Tried first with xbacklight = value: output is No outputs have backlight property. Then I tried with GRUB options like ...
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138 views

my ubuntu 15 dose not boot on lenovo e440 . unsupported brightness interface

I have lenovo e 440 thinkpad and I'v installed ubuntu 15 on it. every thing worked fine. but know when I power on my laptop ubuntu dose not boot and it says : unsupported brightness interface . what ...
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1answer
208 views

Custom Function Keys

The brightness keys don't work on the UX305 so I managed to bind Ctrl+F5/6 to execute xdotool key --clearmodifiers XF86MonBrightness{Up/Down} While this works fine and even shows the visual ...
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64 views

Can't change brightness when plugged off (ubuntu 14.04)

I have a Samsung NP470R4E and recently installed ubuntu 14.04, but can't change brightness when the laptop is not charging. The Fn brightness keys seem to work (e.g. the upper right bar appears and ...
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0answers
27 views

Brightness slider is too fine (14.04)

I'm running ubuntu 14.04 on a Dell laptop (XPS 13 Developer Edition). The brightness slider stopped working (the slider would fill up and empty as usual but the brightness wouldn't change). This fix ...
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65 views

Brightness control not available in ubuntu 14.04 acer veriton desktop

I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness. Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any ...
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1answer
110 views

Change brightness works in Unity but not spectrwm

I use spectrwm so I want to be able to adjust the screen brightness using command line tools. However, none seem to be working. The odd thing is that if I run Unity and access the "Brightness" ...
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2answers
1k views

Can't change brightness of laptop in ubuntu 14.04 / 15.04

When i just try adjusting brightness, the indicator changes but the screen does not change brightness. I have tried adding acpi_backlight=vendor to my grub file and also doing echo x > sudo tee ...
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0answers
487 views

Ubuntu 15.04 - Dual monitor problems

I installed Ubuntu 15.04 and I have problem with my 2 monitors. I was googling so long time and didn't find any working solution for this. 1) I need to set my left monitor primary before login ...
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1answer
283 views

Understanding how to install 14.04 on XPS 13 9343

I recently got a laptop to use Ubuntu on. XPS 13 9343. I've reinstalled the OS a plethora of times because of so much difficulty between drivers, issues with touchpad, wifi, etc. Can any explain to ...
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172 views

Brightness control not working on Ubuntu 14.04 with 3.19 kernel

I'm using Ubuntu 14.04 64-bit with kernel 3.19.0-22-generic, and the brightness control doesn't work anymore on my Samsung Chronos 7 laptop (NP770Z5E). On a 3.13.0-54-generic kernel the brightness ...
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0answers
552 views

Xubuntu 15.04 black screen after screen lock

I am using Xubuntu 15.04 with Xfce 4.12 in a Dell Inspiron 14 laptop, model 3442. Whenever I lock my screen, then put my password and unlock it, the screen brightness gets very low, it's almost as if ...
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49 views

The keyboard brightness controls don't work until after suspend on HP Compaq 6720s

I'm using Ubuntu 14.04.2 amd64 on HP Compaq 6720s. The volume controls work but the brightness controls don't. I did find however that they work only after I suspend the computer and turn it back on. ...
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1answer
97 views

Ubuntu 14.04 fn keys starts to work after resume from sleep

I have a problem with Ubuntu 14.04. After fresh installation none of the fn keys didn't work except for fn+f3 combination - which is sleep. After resume from sleep all fn keys (brightness, power, ...
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1answer
252 views

Ubuntu 14.04 = fn+f2/f3 (backlight) keys not working

With 14.04 LTS Ubuntu (64-bit), using any of the offered kernel solutions (including ones from the newer releases up to 3.19), f2/f3 brightness controls fail to register. As a matter of fact key ...
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1answer
369 views

Fixing brightness levels in 15.04 with systemd

I'm using a MacBook Pro (Mid-2012 model; MacBookPro9,2), dual-booting OS X Yosemite with Ubuntu 15.04, and I'm having an issue with the keyboard backlight brightness. Apparently this issue has been ...
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116 views

Backlight fuction not working lenovo z570 intel i5 nvidia geforce

Processor Intel® Core™ i5-2410M CPU @ 2.30GHz × 4 Graphics GeForce GT 525M/PCIe/SSE2 I can't change the backlight, it's always set on high. Even though when the system goes to sleep, the light gets ...
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1answer
43 views

Toshiba screen backlight only works occasionally

I am having a weird problem - I recently installed ubuntu 14.04 and the backlight doesn't work consistently. If I power off my machine and leave it sit for an hour or two, the screen will work fine ...
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43 views

brightness shortcut doesn't work on 15

I'm using hp 530 with ubuntu 15 the brightness shortcut (fn + f7 and fn + f8) doesn't work when I shutdown computer and start it again but when I suspend it and start it ,it work correctly.... I ...
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1answer
417 views

Brightness adjust Ubuntu vs Xubuntu

I have little problem: LiveCD with ubuntu 14.04 can adjust brigthness on laptop and with xubuntu 14.04(installed from mini.iso) What package i need to install for brightness adjustment. OS ...
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3answers
84 views

i can not edit file even after entered root password

i want to edit actual_brightness with gedit in (/sys/class/backlight/acpi_video0) to change brightness level. my way is pressing alt+f2 then gksudo gedit then enter the password after editing the ...
1
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1answer
727 views

cannot adjust brightness in ubuntu gnome

I just installed ubuntu 14.04 gnome edition. I cant change my brightness using my keyboard shortcuts. I tried to install a gnome shell extension, but its not compatible with ubuntu 14.04. I cant find ...
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0answers
195 views

How to make turning off Logitech K810 keyboard back light automation

I could not find terminal command to turn off the back light of keyboard. For example the following commands do turn off my laptop keyboard back light : sudo chmod 777 ...
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1answer
452 views

screen brightness on X1 carbon gen 3 wont change

I just installed ubuntu on a new x1 carbon gen 3. Its a great machine but i cant seem to change the screen brightness. when i hit the buttons i get the little on screen notification, but it seems to ...
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0answers
96 views

Can I display volume or brightness popup using command?

When you adjust your brightness or volume in ubuntu, you would see a popup notification in the top right corner of the screen to notify you the level of brightness or volume. Just as follows: I can ...
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1answer
740 views

ASUS X555LN Brightness fn key not working in Ubuntu 14.04

I have installed Ubuntu 14.04 on my ASUS X555L Laptop using an nVidia GeForce 520M Graphics card. The fn+f5/f6 keys are unable to adjust brightness. Currently my screen brightness level is maximum. My ...
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36 views

Software controller for any ATI/Nvidia GPU

I wanted to know which GPU to buy for my new PC in order to: 1) Work with Ubuntu. 2) Manage the contrast, brightness... etc. This is really important as I normally have my screens very dim (Via ...
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0answers
92 views

XModMap Key Remapping Not Totally Working

I have a Mac Keyboard I am using with new version of Ubuntu. Whenever in a web browser, I try and hit the F5 key to naturally refresh the page but in Ubuntu this key seems to be mapped to Keyboard ...
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0answers
105 views

gedit error gedit:2128

I am a beginner Linux user I use Lubuntu Core... I have been trying to add echo 9 > /sys/class/backlight/acpi_video0/brightness to /etc/rc.local and every time when I change something in ...
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0answers
149 views

Notifyd brightness notification not showing properly

I have the exact same problem described here. I'm using an nvidia driver and it was all right (I had to use a similar procedure to have my brightness control working). My xorg configuration files are ...
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0answers
198 views

Adjust screen brightness option missing in Ubuntu 14.04 LTS

I understand that there are command-line alternatives to this but I'm trying to figure out why the option is missing from my Brightness-Lock menu under system settings. The highlighted portion of ...
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0answers
271 views

How to Remap Brightness Keys

I have a Dell laptop which has some fairly standard media keys along F1-F12 as well as three special keys by the power button. For the longest time, my brightness down button hasn't worked. For some ...
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1answer
54 views

Nvidia Higher Resolution becomes bright and grainy

Does anyone know how to solve this issue? I'd like to use the higher resolutions, but when I do the display becomes annoyingly bright and grainy. I can confirm it happens on the Geforce 610 and higher ...
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0answers
110 views

Screen Dimming Anomaly

My Lenovo G780 with Ubuntu 14.04 is fine when the AC charger is plugged in. However, when unplugged, if my mouse does not move for ~12 seconds, the screen dims a bit, but this is not detected by my ...
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1answer
1k views

How to make the ambient light sensor work on Asus Zenbook UX303?

I have a Asus Zenboo UX303LN. There is a known issue with the brightness keys, which is no big deal for me but I would like the ambient light sensor to work. I didn't find much information on this ...
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0answers
23 views

Brighness and Lock now working

I installed xscreensaver but this ended up not being what I needed. So I removed it. But now My system wont lock the screen like it use to. The settings are set to lock after 1 min and ask for a ...