Questions related to screen brightness.

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0
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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
76 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
117 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 /...
3
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0answers
496 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
295 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
193 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
592 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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0answers
53 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
111 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
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1answer
285 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
403 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
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0answers
124 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
45 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
1answer
639 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)...
0
votes
3answers
86 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
851 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
1answer
543 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 ...
1
vote
0answers
114 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 ...
0
votes
1answer
828 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 ...
1
vote
1answer
118 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 ...
0
votes
1answer
59 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 ...
1
vote
0answers
114 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 ...
2
votes
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 ...
3
votes
1answer
312 views

screen brightness

Regarding the below topic please tell me is that possible to do it without adding any script to the startup. brightness of the screen So, I could use the function keys to adjust the screen ...
2
votes
1answer
142 views

brightness of the screen

Every time after I restart I have to enter this in the terminal to set the brightness: xrandr -q | grep " connected" xrandr --output LVDS --brightness 0.5 Could someone tell me if there is there ...
0
votes
1answer
353 views

Remap Fn+F3 from XF86Sleep to XF86MonBrightnessUp

I have got a new laptop which is Toshiba Sattelite Pro R50 and I've installed Linux Mint 17.1 on it. After a while it turned out brightness buttons are mapped incorrectly. Fn + F3 is mapped to ...
0
votes
1answer
206 views

Screen Dimming Changed After Upgrade to 15.04?

Up until this week I was able to dim my laptop to a very dim setting, barely any brightness at all, which I liked at night. After upgrading to 15.04, the maximum dim is way brighter than it was before....
2
votes
1answer
824 views

14.04 on Asus GL552JX: Fn+F5 and Fn+F6 Brightness Problem

I've recently installed Ubuntu 14.04.2 LTS on my ASUS GL552JX. The one that always bugs me is the Fn+F# button functionality. This time, all Fn+F# button combinations work except for Fn+F5 (...
1
vote
0answers
122 views

Backlight control broken on 14.04 on Lenovo U310

I'm unable to change the backlight brightness under 14.04. habefaro@habefaro-Lenovo-U310:~$ uname -a Linux habefaro-Lenovo-U310 3.16.0-34-generic #47~14.04.1-Ubuntu SMP Fri Apr 10 17:49:16 UTC 2015 ...
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vote
0answers
250 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 ...
0
votes
1answer
90 views

My laptop brightness doesnot be darker with function key

My laptop has intel hd graphics 4400, and it doesn't work well on ubuntu 14.04 , so I upgraded to ubuntu 15.04. It works fine, but i cannot change my brightness. The funny thing is that i can change ...
1
vote
2answers
164 views

How to Disable Ubuntu Phone “auto dim” function?

Is there a way to disable the auto dim function of the Ubuntu Phone (14.10 r22)? Even though I can disable the auto-brightness function and set the screen timeout to 10 minutes (or never) the screen ...
0
votes
1answer
70 views

My brightness controls aren't working (Ubuntu 14.04), how to fix?

I use either the buttons or the ui but the brightness doesn't change. What do I need to change to get brightness working? I'm using a Toshiba Ultrabook in case it is relevant.
0
votes
1answer
255 views

Disable Fn-keys brightness change on Dell Inspiron E1405

I've got an old Dell E1405 which smoothly runs 14.04, with one caveat that is. When I press the Fn button with arrow-up or arrow-down, the brightness jumps in huge steps. Is there a way to disable ...
3
votes
1answer
513 views

Using /etc/rc.local to turn off keyboard backlight no longer working in 15.04

I have an Asus laptop, and the keyboard backlight comes on full at startup. I formerly used the instructions here to issue a sudo command to turn it off. Basically, the steps were: gksudo gedit /...
0
votes
1answer
88 views

how to make britness control work on ubuntu 14.04 with nVidia graphic card?

I have a Sony vaio VPCEJ equipped with an Nvidia Gforce 410m with cuda ,currently I am under ubuntu 14.04 and using the Nouveau Nvidia driver for my graphic card because I found it to be the most ...
3
votes
0answers
174 views

How to link brightness button to correct brightness script

I recently upgrade my Ubuntu from 12.04 to 14.04. My laptop has always had incomtibility issues between the brightness button and the actual brightness set up. In 12.04 I had fixed the problem by ...
1
vote
2answers
3k views

How to Adjust Brightness in Lubuntu 15.04

I just installed Lubuntu 15.04 on my Toshiba Satellite laptop and can't figure out how to adjust the brightness. I can't find it anywhere and have been looking at other people's questions for an hour ...
0
votes
2answers
1k views

Why do I have two drivers for my display?

I have bought a new laptop recently it is the Asus K555LD and I have ubuntu 14.04 installed and up to date. One of the problem I faced is finding the driver for my nVidia GeForce 820M. After some time ...
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0answers
356 views

Laptop with Ubuntu Mate 15.04 screen dimming after 10 seconds

I watch movies on Youtube, Popcorn or XBMC and after 10 seconds when I have my laptop disconnected from power the screen dims. I know that there is an option in dconf-editor for longer timeout but ...
0
votes
1answer
56 views

Brighness control problem

I'm using 14.04LTS. The function keys that control brightness have been reversed such that when I press Fn + right arrow key, the brightness reduces and when I press Fn + left arrow key, the ...
0
votes
1answer
504 views

Kubuntu 15.04 : Brightness controls not working vs 2 graphic cards?

Just installed Kubuntu 15.04 on my ASUS X555LD (i3) to try out KDE 5.2, and I'm having a few issues. Brightness controls are not working using fn+F5 or F6 I'm a bit confused. My laptop ships with an ...
2
votes
0answers
206 views

Error request power-well from i915 ( Lenovo L440 - Ubuntu 14.04)

I'm using Ubuntu LTS 14.04 on my Lenovo L440 and until yesterday I hadn't experienced any problems, when I started my laptop and received the error message: [ 3.331621] hda-intel Error request ...
0
votes
1answer
347 views

Screen dimming doesn't work (Ubuntu 14.04 LTS)

I have an Asus laptop (G53SW), on which I installed Ubuntu 12.04 (because I had it laying around) which upgraded itself to 14.04LTS. For the most part it works well but the one annoying issue is that ...
4
votes
1answer
1k views

Ubuntu 15.04 brightness doesn't work

brightness on my Lenovo-IdeaPad-P400-touch graphic Intel® Ivybridge Mobile os type 64-bit Ubuntu 15.04 doesn't increase or decrease after updating from 14.04 please help!!!
0
votes
3answers
321 views

Brightness control not working for ubuntu 14.04

When pressing brightness control buttons on my laptop, there is no change in brightness. Brightness is set at a very high level and it hurts the eyes. Provide some solution ASAP.
2
votes
3answers
908 views

systemd-backlight on Ubuntu 15.04

Hey people of the internet! I have a problem saving/restoring the brightness on my laptop... I am running Ubuntu 15.04 server, with Xfce4, but booting default to command line. My problem now is, ...
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vote
0answers
66 views

How do I fix an login error ( black screen with cursor on top left corner )?

Actually I've faced problem in adjusting the brightness in Ubuntu 14.04 LTS. Afterwards, I've configured the "20-intel.conf" file with the following command sudo gedit /usr/share/X11/xorg....