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Questions tagged [backlight]

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

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Cannot set the screen brightness via PCI

I was trying to use xbacklight to set my monitor brightness under the i3-wm. But nothing was happening after typing: xbacklight -dec 10 To investigate I tried to set the brightness via the PCI bus ...
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2answers
32 views

How do I install Iris on Ubuntu 18.04?

I downloaded the 64-bit zip file but I've been unable to find the solution. The Iris website That happens when I try the "extract here" option. Regards
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I can't turn off asus keyborad backlight. No `/sys/class/leds/asus::kbd_backlight` dir

blurhy@blurhy-FX503VD:/sys/class/leds$ ls asus-wireless::airplane input15::kana input4::capslock phy0-led input15::capslock input15::numlock input4::numlock input15::compose ...
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2answers
90 views

Security risk with scripts that write to /sys/class

I was looking for a way to make my laptop's special keys work with i3-wm. I ran into this post and used the script there to create my own. This is what I came up with for the screen brightness (on my ...
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15 views

No backlight/brightness control

This issue is really starting to get to me. I try some things, they dont work, I forget about it, come back to it, yada yada. I get the iMac is dated but the NIC goes into monitor mode and the ...
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0answers
32 views

dbus spam relating to intel_backlight.device

Sometimes the following happens. Fans start constantly running and polkitd is 25% CPU. dbus-monitor --system shows the following sort of thing repeating very rapidly: signal time=1537057403.524844 ...
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10 views

Need help turning off the backlighting of My Sony Vaio laptop

I have tried almost everything - this AU question is the last option. I have set-up Ubuntu through a subsystem on Windows 10 to perform this. I just need the right guidance for success. I tried an ...
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1answer
139 views

Cannot change keyboard backlight with dbus-send

I have kde desktop environment, and Fn + F3 / F4 buttons cannot change keyboard brightness. I also assign other keys to increase or decrease keyboard brightness in global shortcuts menu, but its not ...
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99 views

No brightness control and /sys/class/backlight empty in Ubuntu 18.04

No brightness control available in Ubuntu. I tried various kernel boot paramters and none worked. I tried adding /usr/share/X11/xorg.conf.d/20-intel file with intel_backlight - did not work. I have no ...
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1answer
77 views

Little help with logitech g910

New Linux Ubuntu user here. After looking after some drivers for this keyboard, I found this on github. https://github.com/MatMoul/g810-led I have managed to install this, and the rainbow effect ...
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48 views

Brightness changes are shown by the indicator but have no effect on the display (Lubuntu, Intel card)

I have tried many of the proposed solutions that I could find on the web, but any of them worked for me. I detail here my problem and some of the things that I tried: Relevant details: TOSHIBA NB200 ...
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12 views

Alienware M14xR1 Keyboard backlight colour change

I got an Alienware M14xR1 recently but unable to change backlight colour and by default it is permanently blue, is there any method or script which help in change in color.
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1answer
14 views

Backlight issue ASUS T300 Chi after booting

Introduction I am having trouble with my screen backlight after booting, so when I first enter the login screen. I am running Ubuntu 18.04 bionic. It is a fresh install, fully updated. Probably you ...
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0answers
89 views

Keyboard Backlight Not Working - Sony SVT15115CXS (18.04.1 LTS)

I have tried many things to get the keyboard backlight working on my laptop, to no avail. lsmod shows the "sony-laptop" module. When I get modinfo for sony-laptop, I see parameters kbd_backlight &...
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21 views

Screen brightness reset to Max after every restart [duplicate]

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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40 views

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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2answers
901 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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227 views

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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1answer
713 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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155 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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56 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
287 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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1answer
251 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
367 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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40 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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191 views

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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64 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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2answers
640 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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1answer
413 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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335 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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9answers
7k 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
331 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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0answers
51 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
330 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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354 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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87 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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1answer
428 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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0answers
25 views

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
3k 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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96 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
100 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
95 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
103 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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0answers
75 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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176 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
75 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
533 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
152 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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0answers
301 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, ...