Questions tagged [backlight]

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

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How can I control the keyboardbacklight?

I bought a Gigabyte G5 MD laptop which came pre-installed with Windows OS. So, I installed Ubuntu 20.04.02 LTS as dual OS. Now, The keyboard backlight only keeps the blue light on and I can't find a ...
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Can't change brightness on version 22.04

I'm new to Linux, so I use Linux on dualboot. At the first time of installing Ubuntu, the brightness slider was working fine but when I made some updates + installed an Nvidia driver the slider is not ...
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Brightness control Ubuntu Nvidia GPU

I am using a Thinkbook Gen 2 Laptop with Ubuntu 22.04 LTS freshly installed. I bumped into the same problem as many other people: the brightness of the screen doesn't change neither with the keyboard ...
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Not able to adjust brightness in Thinkpad E14 Laptop

My Laptop has the following configuration. Processor: 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz × 8 Graphics: llvmpipe (LLVM 12.0.0, 256 bits) OS Name: Ubuntu 20.04.3 LTS GNOME Version: 3.36.8 I ...
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How permanently disable keyboard backlight on Ubuntu 20.04

I have installed Ubuntu on Gigabyte Aorus pro B560M motherboard. It worked fine at first but then and after resetting the BIOS(to fix a networking issue) now it has an annoying behavior of keyboard ...
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How to turn off keyboard and lid lights for asus rog ubuntu 20.04 in SLEEP mode?

I have a ROG Strix G731G and I already downloaded and use the rogauracore from this repository https://github.com/wroberts/rogauracore.git. I use the sudo rogauracore black mode and the lights are off ...
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How to manage keyboard backlight on MSI Alpha 15 2021

I recently dual booted my laptop with Ubuntu. It is msi alpha 15 with ryzen 7 5800h. The backlight just stays on always whenever i use Ubuntu. It doesn't have steelseries keyboard. It's maybe ...
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nvidia 470 upgrade broke xbacklight

I just ran a bunch of package updates, going from nvidia 460 to 470. After a reboot, just about everything has survived, except my xbacklight shortcut keys no longer work. Background: The system ...
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Enable brightness/volume popup for keyboard backlight, numlock, caps, et al

In the following figure you can see a popup which is displayed whenever I (de)activate the microphone. A similar popup is displayed when changing the screen brightness of my laptop or when changing ...
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keyboard back-light not working in Realme book but works in windows dual boot

I have dual boot windows 11 and ubuntu 20.04. My keyboard backlight is working in Windows 11 but not in ubuntu. I tried enabling it in settings but I can't find any option to do so.
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cooler master devastator II keyboard how to activate the backlighting in ubuntu 21.10?

I have a Lenovo t420 computer and I use an external keyboard cooler master devastator II with it. Previously I had the version of ubuntu 18.04 and to activate the backlighting I used xset led 3 in ...
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Can you disable backlight Ubuntu 20.04

My laptop, Dell XPS 9570, is running Ubuntu 20.04 and the battery life is terrible. The readings from powertop show I have a discharge rate of over 40W with Device Backlight using 12W even when turned ...
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How to install brightness drivers in 12.10 in core i5 1st gen 650?

I am a newbie.Please guide step by step. I installed UBUNTU 21.10. But cannot control brightness. I installed brightness controller but scrolling the slider does not work. There is no sys/control/...
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How gnome perform privileged tasks without root such as brightness control?

I want to know how gnome performs some privileged tasks without asking root password? As an example brightness value resides in /sys/class/backlight/*adapter*/brightness and write access is only for ...
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Screen brightness not changing in Thinkpad T14 Gen 2 AMD

I purchased Thinkpad T14 Gen2 (AMD Ryzen Pro 5850), I have installed Ubuntu 20.04 with kernel 5.11.0 (as provided by ubuntu). My screen is constantly at full brightness and the neither F5/F6 nor other ...
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Unable to set backlight brightness on Dell laptop

Ubuntu seems unable to control the backlight brightness on my Dell Precision 7550. I'm using Ubuntu 20.04, and selecting nvidia with prime-select. The keyboard brightness keys will make a brightness ...
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Dim screen Backlight

My laptop’s backlight is stuck, no matter what I do, the brightness controls work but nothing's clear enough as the backlight is still dim. I Have tried updating the mesa drivers ( I use a hp ...
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Ubuntu 20.04 backlight problem, only boots from recovery mode

As a new Ubuntu user, I am facing a problem with my backlight. After succesfully dual booting Windows 11 and Ubuntu 20.04.3 LTS on my HP ENVY x360 15-es0570nd (Intel core i7 processor and NVIDIA ...
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Brightness controller not working, ubuntu 21.04 lenovo ideapad l340

I use a lenovo 81LK IdeaPad L340-15IRH. CPU: Intel i5-9300HF GPU: NVIDIA GeForce GTX 1050 3 GB Max-Q The brightness controller just isnt working. I tried a lot of solutions i found online. None of ...
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Can't Adjust Screen Brightness on Lenovo Legion 5 15ACH6H AMDGPU Ryzen 5800H Ubuntu 21.10

Got this device (Lenovo Legion 5 Gen 6) a few days ago, setting up Ubuntu (dual boot alongside Windows) on it has been a real hassle. Wifi didn't work out of the box, found out that Mediatek MT7921e ...
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Hirsute/Impish - Laptop backlight brightness not controllable with nvidia-drivers-470

I updated my nVidia drivers from 460 to 470 in order to use GloriousEggroll's fork of Proton with Steam. Since then, my laptop's brightness has been stuck on full. The GUI brightness control slides ...
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NVidia backlight control (Again) Ubuntu 21.04

Wasn't sure where to post this, so it's in both the forums and also AskUbuntu. Sorry for the cross posting. Hi, I've been using Ubuntu for about a year now and have just bought a new laptop. I ...
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Laptop backlight disabled (extreme dark) after nvidia driver installation

After installation of nvidia-470 driver on my clean ubuntu 18.04 installation i had the problem, that my built-in screen was only showing: /dev/nvme0n1p2: clean, 157519/31227904 files, 4523955/...
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How to control a Backlit keyboard led from ubuntu's terminal? HP Pavilion 15-ec2004AX

I have HP Pavilion Ryzen 5 Hexa Core 5600H 15-ec2004AX I am using ubuntu and I want to control the Keyboard Backlight from terminal. I know that in my laptop I cannot control its color but I would ...
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How can I disable MX Keys Wireless Keyboard backlight

How can I disable Logitech MX Keys Wireless Keyboard backlight on 20.04. I want to turn off LEDs completely with a GUI or command line tool. I was able to turn off LEDs of my Logitech mouse with Piper ...
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Brightness and sound not working after downgrading to 18.04 from 20.04 on dell latitude 3420 intel iris graphics

I have received my laptop(dell latitude 3420) pre-installed with ubuntu 20.04, as there is a personal requirement I have removed 20.04 and installed 18.04. After installing 18.04 I found sound is not ...
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Lost macbook pro LCD backlight brightness controls after installing nvidia driver

I installed Ubuntu 20.04 LTS with the 5.11.0-34-generic kernel on my mid-2009 macbook pro which has nvidia geforce 9400M graphics hardware. Suspend and wake from suspend does not work with the nouveau ...
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brightness control with ddcci and gnome slider

I have connected an external touch to my mini pc. DDCCI module seems to work for me. eg echo 90 > /sys/class/backlight/ddcci5/brightness results in a change of brightness. But unfortunately I ...
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Ubuntu 20.04. How do I turn on the keyboard backlight of my 2010 model Acer Aspire 5745?

I am using Ubuntu 20.04. I have an old Acer Aspire 5745-7247 I purchased back in 2010. I looked at the Ubuntu keyboard shortcut options in the keyboard settings, and keyboard backlight isn't listed ...
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how to really turn off monitor after x minutes?

Ubuntu 21.04 iMac 2013 In the parameters, Energy, there is an option to blank the screen after x minutes. By reading others' comments, it sounds like it is turning off the backlight for them. But ...
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Ubuntu Mate 20.04.2 keyboard backlight timeout - How to inhibit

Ubuntu 20.04 and then Ubuntu Mate 20.04.2 for over a year on an Ideapad Flex 5 14" like a charm. No issues with keyboard backlight until I had the idea to use a keyboard option to use the ...
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How Do I Configure Ubuntu 21.04 so the Display's Backlight Goes Off when the Display is Locked

I am running Ubuntu 21.04 LTS on a MacBookPro (5.3 model). The display's backlight does not go off when the computer is inactive (Apple Logo is always lit). Configuration: I was getting a purple ...
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Laptop Ubuntu 21.04 brightness can't be adjusted

I received my new laptop with Ubuntu 21.04 on it, Nvidia 3070 GPU and Ryzen 9 5000 series CPU (with internal GPU). Running kernel 5.11.0-25-generic. Gnome tries to render most things using the Ryzen ...
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Keyboard back light is not working on Toshiba satellite p55w c5204

How do I solve this issue. My laptop brightness is working fine.. Thank you
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Save and restore backlight on hot shutdown

I have a system on which we regularly perform a "hot" shutdown - plug out the power without issuing a shutdown command. The problem is that the backlight doesn't get saved and restored ...
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No way of changing the screen brightness in Ubuntu Studio 20.04 LTS on a acer TravelMate

I am working on a Acer Travelmate 5360G with dual boot, Lubuntu 18.04 and Ubuntu Studio 20.04. In 18.04 I could not change brightness with Fn + ArrowLeft and Fn + ArrowRight, but I made a little ...
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3 votes
1 answer
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20.04: Adjust display brightness in smaller steps with brightness buttons

The buttons work (out of the box) and brightness is preserved (with acpi_backlight=vendor in GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and sudo update-grub). Brightness is controlled between 0 ...
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keyboard backlight ubuntu 21.04

I've just upgraded my ubuntu from focal fossa to the recent version 21.04 but now my external keyboard backlight is not working. It was working previously using "xset led on" on terminal and ...
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3 votes
3 answers
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Lenovo legion 7 16ACHg6 (2021) backlight brightness control problem

I have a Lenovo Legion 7 16ACHg6 (2021) which was only released recently. It has AMD 5800H with NVIDIA RTX 3060 GPU. One of the issues I found is that backlight brightness control is not working. I.e. ...
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Please help, no back light anymore. MacBook pro won't boot

Okay, a newbie here with a big problem. I installed Ubuntu 20.04 on my 2009 MacBook Pro. I am completely new to the world of Linux and have yet to discover everything. However, I could not dim the ...
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9 votes
6 answers
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Legion 5 pro brightness control doesn't work on ubuntu 20.04 with nvidia driver 460

My laptop seems to be on max brightness and the brightness control slider/Fn keys have no effect on the screen brightness except showing a pop-up notification of the slider. This problem isn't really ...
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Where is the Lubuntu default backlight icon stored?

I have recently installed Lubuntu and have everything working as I want, except for the backlight icon in the taskbar I have at the top of my screen. I can't work out where it is being sourced from. ...
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Changing brightness settings has no effect on Ubuntu 20.10

Note: This is not a duplicate of Ubuntu 20.04 brightness adjust not working, Cannot change brightness (Ubuntu 16.04 LTS and onward) or Unable to change brightness in settings because the answers do ...
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Trouble using function keys to change screen brightness, sleep and adjusting keyboard backlight on ROG Zephyrus G15 running Ubuntu 20.04 LTS

I installed Ubuntu 20.04 on my ASUS ROG Zephyrus G15. I am not able to use the following keyboard action keys shortcuts(Fn+Function keys): Screen brightness(Up:Fn+F7 / Down:Fn+F8) Keyboard backlight(...
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Change screen brightness increment

I am on a stock Ubuntu 20.04 LTS machine with gnome. Using the brightness controls on my keyboard ('fn' + left/right arrow keys), I can adjust the screen brightness up or down (this brings up a gnome-...
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Configure Ubuntu 20.04 server on RPI4 to turn off external HDMI backlight after inactivity timeout

I've installed Ubuntu 20.04 server on an RPI4, and want to configure it to disable the external HDMI LCD monitor backlight after a certain amount of inactivity. Not simple screen blanking as shown in ...
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7 votes
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Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0

As what title shows, I see this message at the screen of booting system. [ OK ] Created slice system-systemd\x2dbacklight.slice. Starting Load/Save Screen Backlight Brightness of backlight:...
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Brightness control not working (lenovo + intel tiger lake + ubuntu 20.04)

I just got a new Lenovo with an Intel Core i3-1115G5 with integrated graphics. After a fresh install of Ubuntu 20.04 the Fn keys that are supposed to control the brightness do not work. The brightness ...
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how to re-install zlib1g_1.2.11 from root access

First, writing from mobile as Ubuntu 18.04 LTS is failing to boot. I have access to 'root@user:~#' from the recovery menu. I have updated the backlight setting (systemctl mask systemd-backlight@...
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3 answers
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keyboard backlight Acer Nitro5 AN515-55 Ubuntu 20.10 works but 2 question

My Acer nitro5 AN5-15-55 laptop keyboard backlight is working , only red is available, (and I cannot adjust keyboard backlight brightness), but the back light 'sleeps' when I am not typing? I can't ...
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