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Questions tagged [backlight]

A backlight is a form of illumination used in liquid crystal displays (LCDs).

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Screen brightness reset to Max after every restart

Every time my PC Ubuntu 18.04 LTS turn off and then turn it back on the brightness is always set back at the maximum. I like to use lowest brightness for my pc. I've tried using xbacklight set ...
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ASUS FX553VD keyboard backlight is not controllable (FN+Down, FN+Up keys)

Notebook: Asus FX553VD (Intel Core i5-7300HQ nvidia gtx 1050) I was investigating how to get this controllable, but did no luck with that. I find that there is maybe a fix, if you patch one file ...
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34 views

Screen brightness in Ubuntu 18.04

So at first even the brightness key (via Fn button) used to work in Ubuntu 18.04. After an update, i can't even change it from the setting. And with the keys, it just show the icon of the screen ...
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How to make keyboard backlight controls work in ASUS FX503VM?

Hello Ubuntu community. I've recently purchased the ASUS FX503VM laptop and I've managed to solve most of the "problems" so far in Ubuntu 18.04. The one that is bugging me for a week now is the ...
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92 views

No brightness control 18.04 LTS: /sys/class/backlight is empty

I know this issue had been addressed in the past (like this, this, this, this, this, this and more), but none were actually given a definite answer. To begin, I'm using a NVDIA GTX1080 Max-Q graphic ...
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47 views

Ubuntu 18.04 Backlight

Running dual boot ubuntu 18.04 and Mac Os on 5.4 mac book pro. Problem is that the backlight for the LCD never shuts off. Never had a problem with 17.10.
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28 views

Backlight on Vaio SVE

I've recently installed Ubuntu 16.04 on my Vaio SVE. Almost everything works fine, but the keyboard backlight insists on stay off. I tried many solutions from different forums and nothing works, like: ...
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1answer
105 views

Backlight broken after upgrading to Ubuntu 18.04

Yesterday, I upgraded from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS. Now it seems the backlight is no longer adjustable. There is no change in the screen brightness when using either my Laptop's hotkeys ...
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52 views

Keyboard backlight on Xiaomi Notebook keeps turning off

Ubuntu 18.04 is installed on my Xiaomi Notebook 13". I am having an issue with the keyboard backlight : after a few seconds without using the keyboard, the backlight of the keyboard turns off until ...
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2answers
160 views

Lowering screen max brightness with Ubuntu 18.04

I'm trying to set a limit for maximum screen brightness on my Thinkpad X250 running Ubuntu 18.04. A bit of context : I changed the original screen with a new one (before installing Ubuntu), the ...
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28 views

Sony Vaio SVE15128CNB, Keyboard Backlight isn't functioning when a key is pressed!, in Ubuntu 18.04

Please provide me with a permanent solution.. Since I have tried with almost all the commands! Also let me know how important is rc.local and pm folders!! Because I can't find them in the list of ...
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Ubuntu 18.04 slows down when adjusting backlight using keyboard hot keys

I have a Dell inspiron 14, and when I use the keyboard hotkeys Fn + F12 or Fn + F11 to adjust the screen brightness, the system slows down and the brightness is adjusted slowly. Sometimes it keeps ...
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44 views

How to alter backlight driver in lubuntu

My question is - if I have a command (tee ...brightness<<<#) and/or driver (nouveau & nv_backlight) that is able to alter my laptop's brightness setting, is there a straightforward way to ...
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1answer
307 views

Xubuntu 18.04: make Fn brightness keys work with /sys/class/backlight/nv_backlight/

I have an old laptop, oldtimer linux fellow, and updated it to xubuntu 18.04. After some sleep/resume problems with the proprietary nvidia-340 driver, I decided to try the nouveau. Sleep/resume ok. ...
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1answer
25 views

Command not giving any output

ls /sys/class/backlight/ is not giving any output on my terminal. I have Ubuntu 17.10 dual booted alongside Windows 10 on my Alienware r3 15. I need to solve this issue to try to fix my main issue ...
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140 views

How do I turn off backlight of keyboard?

I've tried xset led 3, xset led off, xbacklight -set 00, sudo find /sys/devices/platform/ -name leds returns nothing, so I couldn't try that. sudo find /sys/devices -name leds returns /sys/devices/...
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178 views

Sony Vaio Backlight

Already posted in Community, but got locked and moved, and got lost, sorry. Here's the issue: I'm using Ubuntu in a Sony Vaio SVF15A17CLB, which has a backlit keyboard, but it's not turned on by the ...
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7answers
4k views

Display brightness cannot be adjusted 18.04

I have recently installed Ubuntu mate 18.04 on my XPS 15 9560. I cannot adjust the display brightness through any means. I have tried the following: Set the acpi_backlight=vendor in boot parameters ...
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1answer
193 views

Unable to change the screen brightness

I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the ...
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44 views

How can I use my brightness control keys?

I'm recently trying ubuntu mini.iso with openbox wm and really enjoying it. But I can't control my brightness with special keys on my laptop. Before this I've tried Xubuntu and these keys were working ...
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2answers
222 views

Cannot adjust Brightness 16.04

Complete newbie here. I have installed Ubuntu and love it, but the screen brighness is far too low. I cannot use the computer in the daytime. I have insalled Ubuntu single boot in an intel iMac with ...
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343 views

Brightness not working on ubuntu 17.10, broken upgrade from 17.04?

There are multiple similar questions present, but none addressed my concern. I recently upgraded from 17.04 to 17.10. Full story: I start the system: Dell logo -> a dark maroon screen -> Display is ...
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56 views

Black screen after suspend (iMac 11.2, Ubuntu 16.04)

On my iMac (mid-2010, specs) I have Ubuntu 16.04 with a recent kernel update (4.15.10) but am still not able to recover from suspend. I have been able to figure out how to wake up the computer with ...
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354 views

Lenovo Legion Y720 keyboard backlights not working

Is there someone successfully managed to make working Lenovo Legion Y720 keyboard backlights. Tried some of the instructions that are out there so far nothing. Also upgraded the kernel to 4.15.9-...
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Display brightness inversed on Toshiba Satellite L555

I installed Ubuntu Mate 17.10 on my Toshiba L555 and the control of the brightness now works inversed, very annoying when enabling the dim function in the power manager as the display goes brighter ...
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3answers
2k views

The brightness of laptop screen cannot be adjusted with either the buttons or the slider. Edit

I have Ubuntu 17.10 installed on a MSI GT72VR laptop with a single nVidia GT1060 graphics card, grub2 as a bootand Unity as a desktop. I can't change the brightness in any way. Bright always is 100%. ...
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81 views

Unable to set screen brightness - xubuntu 16.04

Here are my issues : I can't change the screen brightnesss on my laptop. The keyboard combinations made for it (Fn+F5, Fn+F6) do not work. I read that the desktop environment (Xfwm, or Xfce, I don't ...
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0answers
63 views

Missing asus::kbd_backlight directory in my laptop (Lubuntu 17.10)

I have an ASUS GL553VE (ROG) laptop, this morning i installed kernel 4.15.5 because in some posts they told it solved the problem of backlight and keyboard backlight. I have been able to solve the ...
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1answer
90 views

MacBookPro10,1 can't adjust backlight In Ubuntu, have tried everything

This is my last ditch attempt to get backlight controls working in Ubuntu 16.0.4 on my MacBook Pro 10,1 (Retina, Mid-2012) with an NVIDIA GeForce GT 650M. I'm using the NVIDIA driver version 384.111. ...
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0answers
66 views

Turn Keyboard backlight on ASUS Predator

Hi I've just made the switch to Ubuntu on an Asus Predator. And loving it so far. However, I'm a command line n00b and I've been trying to get my keyboard backlight to turn on with no success. Could ...
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68 views

Switching backlight brightness to zero by pressing fn-key

I have Ubuntu 16.04LTS running on my Dell XPS 15 9550. Until yesterday the fn-key for setting the brightness was able to set the brightness level to 0 (shutting backlight off completely) which I ...
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86 views

nothing in the /sys/class/backlight. and, I can't control the brightness of display

Although I tried so much ways including grub setting, it doesn't work. As I searched several solutions, the main difference of my computer compared with others is that there's literally nothing in ...
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1answer
64 views

can't control the brightness of display on ubuntu

I just installed Ubuntu 16.04 in my labtop. But the problem is that the monitor is too dim&dark and I can't make the display brighter as the brightness control slider is not shown. https://www....
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2answers
391 views

Adjusting the display backlight on HP ZBook 17 G4 with Nvidia Graphics

Posting this because I've been googling frantically attempting to save my poor, poor eyes without much success. And I've not found anyone posting specifically about this specific laptop, so new post. ...
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0answers
136 views

Gnome Night Light with OLED

I have a Lenovo Thinkpad X1 yoga, which has an OLED display. This means the brightness isn't set in the usual way, but luckily you can get around that with scripts using xrandr --brightness. ...
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245 views

Adjusting Brightness with Ubuntu 16.04 on Macbook Pro 2015

I am completely new to this linux thing and dI just installed a dual boot of macOS and Ubuntu on my macbook pro 2015. Unfortunately, the brightness buttons are not working, and in the system settings, ...
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37 views

Is there something similar to backlight `/sys/class/backlight/____/brightness` but for desktop computers?

Background I'm playing around with an experimental application for changing the brightness of computer screens. I started on my laptop computer and have been using /sys/class/backlight/...
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346 views

How to automate keyboard backlight ON at boot

Right now I am running a cooler Master keyboard on Kubuntu 16.04. At present I have to run xset led 3 in Konsole in order to turn the keyboard on, which is a PITA. How can I instruct the system ...
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90 views

Not Working Keyboard Shortcut Fn+Right/Left on Ubuntu 17.10

Help me, acer 4741Z.. Before, I write on Ubuntu 16.04 terminal like this: Name: Brightness up Command: /opt/extras.ubuntu.com/indicator-brightness/indicator-brightness-adjust –up Name: Brightness ...
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20 views

What values can kbd_backlight files take? [duplicate]

I wish to turn off my keyboard backlight, and I have discovered the files kbd_backlight and kbd_backlight_timeout in /sys/devices/platform/sony-laptop. Both say '-1' when opened in gedit. What values ...
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27 views

Cannot dim backlight on my laptop equipped with nvidia graphics card

I googled and tried following ways: 1. Changing GRUB file. 2. Installing latest nvidia driver removing old one. 3. Used "xbacklight" command. 4. Went into the directory file of brightness and changed ...
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1answer
594 views

Backlight not working on Ubuntu 17.10, Lenovo P51, Xorg, NVIDIA Quadro M1200

After struggling to install NVIDIA drivers using the discrete graphics card, I finally recognized that my display backlight is always at full intensity and can not be changed via keyboard controls. ...
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0answers
143 views

laptop backlight not working on Asus (nvidia gpu)

First of all, probably someone somewhere answered my question so I apologies if I missed that solution, but after hours and hours of searching web, forums, here, I just can't figure it out. While ...
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0answers
25 views

System monitor brightness reset to maximun after restart in Ubuntu 14.04

I'm using Ubuntu 14.04. Initially it won't support brightness options by default. After i enable by following Cannot change backlight brightness Ubuntu 14.04. After whenever i restart my system, the ...
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0answers
24 views

Avoid display dim when a certain application is open

Is there any way to avoid the dimming of the screen when i open a certain application?? I mean, for instance, when i use evince for read something i want to disable the dimming option. But only when ...
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2answers
306 views

Built in dell keyboard backlights not working

I have a Dell Inspirion e4310, and it came with windows 7, and the keyboard backlight worked. But I put Ubuntu on it instead, and now the back lights don't work at all. I have tried using the sudo ...
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753 views

Wayland equivalent to “xset led”

I have been using Ubuntu since 16.04, with the CM Storm keyboard. When using this keyboard on Windows, pressing the Scroll Lock key enables/disables the backlight. Previously on Ubuntu, the commands ...
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0answers
33 views

backlight reading from wrong file Ubuntu 16.04

In /sys/class/backlight/ I have to folders, ideapad and intel_backlight. After some unidentifiable event, the brightness controls stopped working. After a lot of reading the internet, I identified the ...
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1answer
454 views

Laptop screen only works when connected to external monitor

Once in a while I see the following problem on my HP Envy 17 notebook (2100ed): When I power up, the backlight switches on, but apart from that the screen is black. (No BIOS menu/grub etc, nothing.) ...
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1answer
194 views

Can too low brightness damage my screen?

I can modify /sys/class/backlight/acpi_video0/brightness to set brightness of the screen. Previously I had Windows installed, and the lowest brightness went down to some certain point, however, on ...