Questions related to screen brightness.

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0answers
40 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 ...
0
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0answers
87 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 ...
3
votes
2answers
53 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 ...
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votes
1answer
79 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 ...
3
votes
0answers
238 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 ...
1
vote
1answer
40 views

Is there a software way to make the screen more readable?

I have a Lenovo Carbon X1 laptop. Often when it's sunny outside I can barely read the screen, even at the brightest setting. Is there a software tool that has something like a "crazy contrast mode", ...
0
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0answers
88 views

14.04 freezes on Acer Aspire 4810T when adjusting screen brightness with keyboard

System hangs only when using Fn key and left and right arrows to change brightness. Does not hang when using slider in System Settings. Already tried this: Ubuntu 14.04LTS hangs when i change ...
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0answers
59 views

How to set custom brightness as default in Ubuntu 14.04 [duplicate]

My problem is whenever I boot the PC Ubuntu is loaded with full brightness... So every time I have to reduce brightness on booting and then start my work... So is there a way to set custom brightness ...
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0answers
30 views

Ubuntu 14.04. Samsung Ativ Book 6. Brightness doesn't change [duplicate]

When I change my brightness, the slider moves, the brightness level changes, but actual brightness is the same. I have read a lot of topics about this problem. I tried to change grub, to create /usr/...
9
votes
1answer
205 views

Disable automatic brightness according to content in Ubuntu 14.04

I am running Ubuntu 14.04 LTS on a Dell Latitude E3440 laptop. My problem is that screen brightness automatically changes depending on content. This means that the screen gets brighter when the ...
2
votes
0answers
101 views

Can't change brightness using DDControl with Catalyst driver

I have a Samsung SyncMaster SA100. This monitor doesn't come with buttons to change the brightness, only a power button. The guys at Samsung say that you should change the brightness using a ...
1
vote
0answers
28 views

Why don't remember brightness (U14.04, Samsung Ativ book 9 lite)

Why Ubuntu doesn't remember the screen brightness ? Whenever I turn it on, it always returns to the max, even if I set on settings. Thanks in advance
1
vote
1answer
143 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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0answers
158 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 ...
0
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0answers
57 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 ...
1
vote
1answer
61 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 ...
0
votes
1answer
60 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 ...
0
votes
1answer
366 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 ...
1
vote
0answers
43 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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0answers
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 ...
1
vote
0answers
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 ...
0
votes
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 ...
0
votes
0answers
94 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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0answers
317 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 ...
2
votes
2answers
232 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 ...
0
votes
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
votes
1answer
220 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 ...
0
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0answers
140 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 ...
0
votes
1answer
231 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 ...
0
votes
0answers
66 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 "...
2
votes
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 ...
1
vote
0answers
72 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 ...
0
votes
1answer
112 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" ...
0
votes
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 /...
3
votes
0answers
490 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 screen,...
0
votes
1answer
288 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 ...
0
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0answers
180 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 ...
2
votes
0answers
573 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 ...
0
votes
0answers
52 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. ...
0
votes
1answer
105 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, wifi)...
0
votes
1answer
263 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 ...
1
vote
1answer
388 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 ...
0
votes
0answers
122 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 ...
0
votes
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 ...
0
votes
0answers
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 ...
0
votes
1answer
533 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 (x)...
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3answers
85 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
vote
1answer
796 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 ...
0
votes
0answers
220 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 /sys/class/leds/smc::...
0
votes
1answer
495 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 ...