Questions related to screen brightness.

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25 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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6 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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8 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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24 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
55 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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22 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
19 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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15 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
51 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
62 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 ...
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2answers
87 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
18 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
35 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
25 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
97 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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0answers
20 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
24 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
25 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
29 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
68 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
47 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
19 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
41 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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0answers
105 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
16 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 ...
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1answer
99 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 ...
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1answer
79 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
43 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 ...
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1answer
85 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 ...
2
votes
1answer
227 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 ...
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0answers
47 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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0answers
99 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 ...
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0answers
59 views

How do I can reset brightness settings to default by Live ubuntu?

I tried to set my machine brightness via this link (How do I set default display brightness?). After rebooting, I haven't any screen now. I use ubuntu 14.04, Can say me any body that how do I can set ...
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1answer
72 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 ...
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0answers
25 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 ...
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0answers
48 views

Nvidia Brightness Control Not Working

I have an Acer laptop with Nvidia 520M. The problem is, the screen brightness isn't working. If I switch to use Intel display driver, the brightness can be controlled. I've tried all ways such adding ...
0
votes
1answer
54 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
50 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 ...
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0answers
42 views

How to display correct keyboard backlight levels?

I have a DELL latitude E6420 running Ubuntu 14.04 LTS. When pressing Fn+right button, I am able to change the keyboard backlight (works good), but on screen, this on screen notification (notifyOSD), ...
2
votes
1answer
191 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
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1answer
35 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 ...
2
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0answers
67 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 ...
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2answers
342 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 ...
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0answers
16 views

screen brightness does not affect working hours

I have noticed that screen brightness does not affect working hours on battery of my laptop in any Ubuntu version I used so far (Ubuntu 12.10, 13.04, 13.10, 14.04, 14.10 and 15.04). I can increase ...
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2answers
133 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
75 views

Ubuntu 14.04 Black Screen after login (due to changed brightness?)

I have an hybrid switchable (AMD+Intel) PC, where I have both ubuntu and windows 7. Two days ago I was using Ubuntu, and since the battery was low I lowered the brightness. Usually, when I lowered ...
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0answers
234 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
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1answer
44 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
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1answer
183 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
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0answers
66 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 ...