Questions related to screen brightness.

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0answers
10 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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votes
1answer
30 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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votes
3answers
2k views

Hot keys brigtness issues with Ubuntu 14.10 in Acer Aspire 5755

I have a Acer Aspire 5755 with Intel video graphic, on Ubuntu 14.04, the combination Fn+←/→(Right/left) arrows can increase/decrease the brightness screen. Works fine on unity and with a ...
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votes
1answer
30 views

I'm new to Ubuntu and i have a couple of questions [on hold]

I got a new laptop (samsung n150) and i decided to install Ubuntu because i always wanted to try it out and i like it a lot but i got some questions as a noob i am ... 1-Can i run programs like ...
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vote
1answer
7k views

atheros wireless ar9285 driver

I have been having problems with wireless on Ubuntu 10 and above, Mint 11 and above. The problem is in the driver for the wireless... I can see that there is no driver installed and yet it works but ...
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0answers
34 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
11 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
63 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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0answers
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, ...
0
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1answer
37 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 ...
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2answers
5k views

No back light on my Acer Aspire 5734z

I installed Ubuntu (12.04) on my Acer Aspire 5734z and the back light stopped working. I have tried the fix by editing the grub file posted on here a couple of days ago but that hasn't fixed it. I ...
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0answers
25 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
2answers
436 views

Fn+F5,F6 keys to adjust brightness doesn't work

I have an Asus N56JK computer and I have tried many different options such as updating the Grub file in /etc/default/grub but to no avail. All other Function keys seems to be working but only function ...
1
vote
1answer
5k views

Fn keys for Brightness not working on Toshiba Satellite L755

I am running Ubuntu 12.04 and I love it! The only problem is the keys for my brightness, F6 and F7, does not work when I am on battery power or AC power. It randomly works after I am idle for a while ...
0
votes
1answer
12k views

Unable to adjust brightness in Ubuntu/Xubuntu/Lubuntu13.04

I've recently upgraded to Xubuntu 13.04 and noticed that I'm unable to use the brightness keys to adjust the brightness of my screen. I've tried just about everything this thread suggest and I'm still ...
2
votes
2answers
405 views

How to set automatic brightness in macbook pro?

I have just installes ubuntu 14.04 in my macbook pro, and I already configure all but the keyboard and screen brightness. In OS X, the brightness is controled automatically, I want to know if this is ...
0
votes
1answer
4k views

How to adjust brightness on Lubuntu?

I can't adjust my screen brightness. Indeed, I can't find this option in my system parameters. I am using Lubuntu 12.04. Thank you for your time :)
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0answers
19 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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vote
2answers
70 views

What to choose as application to launch Brightness-Controller?

I'm new in *ubuntu. I'm using lubuntu 14.04. When I'm trying to download Brightness Controller it is saying This link needs to be open with an application. Which application to choose? Actually ...
0
votes
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 ...
0
votes
1answer
52 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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0answers
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 ...
0
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3answers
138 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.
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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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1answer
275 views

Lubuntu Display brightness

Just installed Lubuntu 14.10 on my machine. I cannot change the display brightness. I have a slider in my power settings but it does nothing. Cannot post screenshot of the slider because of no rep ...
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0answers
129 views

Screen brightness not changing Macbook Pro 13 Retina 11,1 Ubuntu 14.04

Just installed Ubuntu on my mac and when I press the brightness keys the meter shows that it it decreases but the screen brightness remains the same. How do you fix this issue?
1
vote
1answer
3k views

Message {1.079026} ACPI PCC probe failed; starting version 219

I am running Ubuntu 15.04 (Vivid Vervet) with 3.19.5-031905-generic #201504211114 kernel and GNOME Shell 3.14.4 on a Samsung NP370R4E laptop. When I boot up, I see [1.079026] ACPI PCC probe failed ...
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2answers
94 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 ...
1
vote
2answers
1k views

screen brightness control not working: Lenovo g50-45: AMD Radeon: Ubuntu 14.04

I've a Lenovo G50-45 machine with AMD processor [Radeon APU A4-6000 with R2 Graphics]. I tried the solution from Rmano but no success. Using Ubuntu 14.04. I tried the solution pasted here: Ubuntu ...
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2answers
1k views

brightness control not working in 14.04 (dell inspiron 3537)

brightness control not working when keys are pressed with Fn key. it shows indicator on top right corner increasing & decreasing but nothing happens.
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votes
2answers
4k views

Brightness options in Ubuntu 12.04 desktop missing

I am unable to change the brightness of my desktop screen using this path. System settings{top right corner of the screen)>Under Personal Brightness & lock.No option to change brightness is ...
0
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1answer
41 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 ...
0
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0answers
26 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
107 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 ...
87
votes
18answers
74k views

Brightness is reset to Maximum on every Restart

The brightness of my laptop is reset to Max on every restart. I tried the solution provided at this website but had no luck. ...
6
votes
2answers
3k views

How to adjust contrast with xcalib

I'm trying to adjust contrast on my laptop, a ThinkPad E430, running ubuntu 12.04: xcalib -co 70 -a xrandr --output LVDS1 --brightness 0.7 Either of them works only for 1-2 seconds and after that ...
1
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0answers
180 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
6answers
6k views

Unable to change brightness on a Toshiba L750

So, as a number of users seem to be experiencing, I am unable to change brightness on my laptop. Using the Brightness and Lock in settings, the slider moves but brightness does not adjust. The fn keys ...
5
votes
5answers
21k views

How to make my screen brightness not change when I plug my laptop in

I do not want my laptop to change brightness when my laptop power is plugged in or unplugged. I set my brightness based on how bright my surroundings are. If I am in a dark room, I set my brightness ...
1
vote
5answers
629 views

Asus UX303LAB brightness keys do not work

I am a beginner at using linux and I have been trying to get Ubuntu to work with the ASUS ZenBook UX303LAB (Broadwell version). I am having problems with Brightness keys, keyboard backlight brightness ...
1
vote
1answer
2k views

What is the difference between GRUB_CMDLINE_LINUX and GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub

I'm troubleshooting a fn-key brightness control problem on my laptop, so I'm wading through a lot of config options in /etc/default/grub, as you can imagine. However, it's raised a question for me: ...
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vote
2answers
2k views

Can't change brightness on Toshiba l755 laptop

I have a Toshiba l755 laptop, and I installed 12.04 64bit on it. The default brightness of the laptop is set to maximum value, and I can't change it. If I go to Configuration → Brightness, the ...
0
votes
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 ...
0
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0answers
26 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 ...
1
vote
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 ...
0
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0answers
26 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 ...
0
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0answers
32 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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votes
2answers
412 views

Brightness keys not working and no obvious interface for adjustment either

New to Ubuntu and so far pretty happy with it but one niggle is the brightness controls do not seem to work. I have looked at fixes on here + google but nothing seems to get it right. Mostly effecting ...
0
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0answers
72 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 ...
0
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2answers
948 views

Change brightness on Asus G53JW with Ubuntu 14.04

I have an Asus G53JW and I can't manage to change the brightness anyhow (fn hotkeys are not working). I used Debian for 6 months and had the same issue and never found I way around this. I did ...