Questions tagged [brightness]

Questions related to screen brightness.

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Keyboard backlight of my laptop doesn't seem to be seen

My laptop has an RGB keyboard backlight that i cannot modify. Currently, at boot, the keyboard goes through a few colours before stopping on blue. Afterwards, shortcuts do not change it, and if the ...
user1771942's user avatar
2 votes
2 answers
76 views

Can't adjust brightness on my Lenovo IdeaPad with OLED display

I had bought Lenovo IdeaPad Pro 5 14IMH9 this week, but when I installed Ubuntu 22.04.4 LTS, there is no option to adjust brightness. I feel like I tried everything with my friend - updating drivers, ...
Denis's user avatar
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2 votes
2 answers
93 views

Why is my laptop screen dim after resume from screen-lock, sleep, or suspend?

After every resume from screen-lock, sleep, or suspend, my laptop screen is very dim. If I type Fn+F6, then the screen jumps to 100% brightness instantly. (F5 and F6 are my brightness control keys.) $ ...
mpboden's user avatar
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The brighness slider isn't visible in the system menu and I don't know how to display it

Ubuntu version : jammy 22.04.4 LTS. It's been months since I tried to fix the problem I had, the brightness slider wasn't working; it didn't change the brightness even when I lower the value. However, ...
ihab's user avatar
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-1 votes
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I recently installed Ubuntu 20.04 on my Lenovo Legion Pro 7 16IRX8H and cant get the audio, touchpad or brightness adjustement to work

Here is a link to my ALSA info: http://alsa-project.org/db/?f=a8e8f3b7bee298d3d5ff33652668b03a9e849000. Here is my xinput list: xinput list ⎡ Virtual core pointer id=2 [master ...
szaboo's user avatar
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1 answer
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How to set brightness and color temperature in iMac late 2009 after setting nomodeset?

I am running Kubuntu 22.04 on an iMac late 2009 27 inch. It is also known as iMac 11,1. This computer has AMD ATI Mobility Radeon HD 4850 graphics, and it only shows a black screen beyond grub unless ...
Archisman Panigrahi's user avatar
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Some Fn keys not working in Ubuntu 22.04 on Toshiba Tecra

I recently installed Ubuntu 22.04 on my new Toshiba Tecra A50-K and some of the Fn keys do not work. They don't even register when pressed with the Fn command. Specifically the brightness keys Fn+F6, ...
Divyajyoti's user avatar
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69 views

HP Victus Ryzen cannot change screen brightness

On my HP Victus Ryzen laptop with AMD 6500 graphics with Ubuntu 22.04 I can't change screen brightness. When I press the fuctions key a popup appears, but screen brightness is still default. I tried ...
Damasz's user avatar
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xrandr does not change the screen brightnness

I have two screens connected. xrandr --listmonitors Monitors: 2 0: +*DVI-I-1-1 1920/598x1080/336+1600+0 DVI-I-1-1 1: +HDMI-1 1600/621x1200/341+0+0 HDMI-1 xrandr --current | grep connected DP-1 ...
Sam's user avatar
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External Monitor and Screen Brightness Funcitionality Lost At The Same Time

I've been using Ubuntu several years, and since yesterday, I am unable to connect to my external monitor, and it seems at the same time that my laptop's screen brightness functionality was also lost. ...
EJF's user avatar
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22 views

Ubuntu 22.04 Software to neat and clean image like ClearScan etc

I am using Ubuntu 22.04. In android mobile there are many applications like ClearScan in which you just upload an image and it automatically adjust its brightness and contrast. Is there any software ...
Aniruddha Mohod's user avatar
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22 views

Ubuntu live usb is not turning on laptop backlight

A friend of mine has up an old xp-era laptop and wants me to try to give it some level of usefulness. It boots up to the windows login screen just fine, so I put in my Ubuntu usb and grub came up like ...
rnystrom06's user avatar
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How can I apply redshift or sct and not have brightness reset to default in Lubuntu Jammy Jellyfish?

With Windows 10 I can turn on 'nightlight' and adjust the screen brightness with 'nightlight' staying in the 'on' position. But with Lubuntu Jammy Jellyfish if I use 'sct' or Redshift my dimmed ...
earthpages's user avatar
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125 views

ASUS TUF Dash F15 keyboard backlight not working

My keyboard backlight on my asus TUF dash F15 notebook does not work, even though I looked in /sys/class/leds/asus::kbd_backlight and brightness file changes on Fn+F2 and Fn+F3. I have tried some ...
HelloWorld7894's user avatar
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Unable to change the screen brightness after installation of Ubuntu 22.04

My system configurations are: Lenevo IdeaPad gaming with AMD Ryzen 5000 series, Nvidia GeForce GTX. I have referred to one of the articles and updated the grub configuration mentioned below. Default ...
Chetan Rajpurohit's user avatar
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308 views

Brightness control not working on Ubuntu in HP Victus Gaming Laptop

I'm new to Linux and recently set up a dual boot with Ubuntu (22.04.3 LTS Desktop) and Windows 11 (Home) on my Victus by HP Gaming Laptop 15-fbOxxx (8GB/512GB), AMD Ryzen 5 5600H with Radeon Graphics, ...
Ash's user avatar
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1 answer
124 views

Cannot change screen brightness / backlight levels in Ubuntu 22.04.3 on laptop with Ryzen 6800H with Radeon graphics + Nvidia RTX 3070 GPU

Today (12th Dec 2023) I reinstalled Ubuntu 22.04.3 on my Asus dual-boot laptop with the specs "Ryzen 6800H with Radeon graphics + Nvidia RTX 3070 GPU". When I try to change the screen ...
Joshua T's user avatar
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Ubuntu 22.04.3 Kernel broke the brightness

I've just updated the system and with the update came the kernel 6.2.0. I restarted my labtop and the next thing I knew is that the brightness broke and won't get any lower from the highest possible ...
Mazeral's user avatar
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1 answer
134 views

Ubuntu 22.04 Screen Brightness Remains Dim If Not Logging On Immediately

Ever since I upgraded to Ubuntu 22.04 I've been having a problem with the screen brightness if I don't log on immediately after booting. Steps to reproduce: Boot Ubuntu 22.04 After boot, don't log in ...
Ken's user avatar
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45 views

Ubuntu gives warning and I cannot change brightness of display

When I turn on my laptop(Hp Victus 15) ubuntu gives warning before entering to system like this 0.2872551 ACPI BIOS Error (bug): Could not resolue symbol E_SB.PCI0.28.ECO 1, AE _NOT_FOUND (20221020/...
Abbos Meliyev's user avatar
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xcalib: how to increase brightness back gradually?

IMO xcalib is weird. Maybe it is because I don't know how color profiles work. But same effect that I achieve by decreasing my backlight brightness I just found out I can achieve with xcalib -alter -...
Martian2020's user avatar
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1 answer
145 views

Display Brightness Not Changing Lenovo Thinkpad T14s

The display brightness adjustment while using Ubuntu on my Thinkpad T14s (AMD CPU + iGPU) does not work. Specifically, the brightness slider in the settings does not change the brightness of the ...
KetZoomer's user avatar
  • 107
2 votes
1 answer
272 views

I can't change brightness on ubuntu 22.04.3 LTS

I recently set up a dual boot with Windows 11 and Ubuntu 22.04.3 LTS. After a few days when i switched from windows to ubuntu i found myself unable to change brightness with fn+F2 like in windows. I ...
Krat0s's user avatar
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1 answer
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characters in terminal not 100% white and backgournd is not 100% black on terminator window on xfce4

I use two machines often using vnn. One is ubuntu 20.04 unity the other is ubuntu 22.04 xfce4. I used terminator window on both systems. But in the xfce4 case, the character is not 100% white and the ...
Chan Kim's user avatar
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94 views

Keyboard backlight: how to have it turn off automatically after x minutes of inactivity on Macbook Air

Ik recently installed Ubuntu 22.04.3 LTS on my Macbook Air (i5-4250U, 4Gb, 121 Gb). System works like a charm, except for one thing. I want the keyboard backlight to automatically dim / turn off after ...
Koen B's user avatar
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15 views

Brightness fluctuations depending on screen content

The brightness changes depending on what screen I am on. Generally, it's a useful thing, but when I'm browsing some code on VSCode, it flickers so fast, it gets too irritating. It's happening with ...
Vishal Kumar's user avatar
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Ethernet disconnected trying to fix brightness slider on Ubuntu 20.04

Running an ROG G15 laptop. I recently installed Ubuntu 20.04 in a dual boot setup with Windows 10 as the other OS. One thing I noticed was that my brightness slider wasn't working, so I looked it up ...
CakeDefense's user avatar
1 vote
2 answers
459 views

Brightness control no longer working after update to Ubuntu 23.10 in computer Dell OptiPlex 7780 AIO

I have updated to Ubuntu 23.10 from 23.04 (Kernel from 6.2 to 6.5) and brightness control in the computer Dell OptiPlex 7780 AIO is no longer working properly. The kernel module dell_uart_backlight (...
Txordi's user avatar
  • 11
0 votes
0 answers
80 views

Brightness controller disappeared after 23.04 ubuntu upgrade

My brightness slider/controller disappeared after 23.04 ubuntu upgrade (top right hand corner + in power settings), used to work before in 22.10. (similar problem to this i suppose: 22.04 jammy shows ...
Arnaud's user avatar
  • 33
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1 answer
61 views

Can't change the brightness on my new laptop

I have bought a new PC and I installed Ubuntu 20.04 on it. The brightness control on my keyboard works, but the screen brightness does not change. Here are my computer's specs: I have tried ...
R_J's user avatar
  • 1
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0 answers
31 views

Brightness doesn't change

At first my laptop didn't fully shutdown so I edited grub file GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset" and that worked pretty well. But, I found out that brightness no more ...
Mohamed Riad's user avatar
0 votes
1 answer
47 views

What is the sd-bright task, and why will it not freeze?

When I close the lid of my Acer Nitro laptop, I see this in my journal: systemd-logind[628]: Lid closed. systemd-logind[628]: Suspending... ... systemd-sleep[2396]: Entering sleep state 'suspend'... ...
Bram's user avatar
  • 2,449
-1 votes
1 answer
133 views

Cannot find the brightness controller

The default brightness controller is supposed to be visible here: But it is not visible. Following is my system configuration: I have also a NVIDIA RTX 2060 Super GPU. Following is its configuration:...
hafiz031's user avatar
  • 369
0 votes
0 answers
8 views

Laptop screen Dims after getting unplugged, can not change it unless with a reboot Kubuntu 22.04

Anytime I unplug my laptop it gets dimmed, however even if I press the brightness keys or change the brightness slider OR PLUG IN my laptop, it will not change, the only way to get it back to normal ...
Alex Castle's user avatar
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0 answers
46 views

UBUNTU 22 + NVIDIA second monitor brightness issue

I have a second monitor connected to the laptop and EVERY TIME I start the computer I am forced to set the screen brightness as the setting is always set back to the default Brightness 0, Constrat 0, ...
Leonardo Ferreira's user avatar
1 vote
1 answer
437 views

How can i fix Brightness adjustment on iMac 11.2 under Ubuntu 22.04.3 LTS ? The brightness still at his max

I'm new to Linux, and I don't know much about commands, I have an iMac 11.2 Intel® Core™ i5 CPU 680 @ 3.60GHz × 4, RAM 12 gb on which I installed Ubuntu 22.04.3 After solving the ventilation problem ...
Lambrah93's user avatar
0 votes
1 answer
312 views

Ubuntu 22.04.3 LTS : Brightness slider not showing

Brightness slider is not showing beneath the sound slider in the topbar I first installed ubuntu 20, brightness or anything relateted to brightness was not working, (I tried installing brightness ...
V R's user avatar
  • 1
0 votes
0 answers
268 views

Lenovo Legion Slim 5 reboots when change brightness from keyboard

I have Lenovo Legion Slim 5 laptop with Ryzen 7 and RTX 4060 (2023) and Ubuntu 22.04.2 Problem: when I change display brightness with a keyboard hotkeys, laptop spontaneously reboots. Brightness is ...
Kroki2's user avatar
  • 1
0 votes
1 answer
241 views

intel_backlight directory does not exist in ubuntu 22.04

Previously I'd been changing my laptop screen brightness by directly changing the value of /sys/class/backlight/intel_backlight/brightness; But recently I noticed that intel_backlight directory is ...
Tom's user avatar
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1 vote
0 answers
55 views

Brightness bug on iMac14,3 I leave to see Brightness control on Ubuntu 22.04.3

Just one day I started computer and I leave to see brightness control and the screen looks dark, and I can't find way to revolve, I restarted. There is a way to resolve without reinstall all programs?
Benjamin's user avatar
0 votes
0 answers
39 views

Keyboard Brightness control not working on Lenovo IdeaPad 5 15ITL05. How to solve?

Running Ubuntu 22.04 on a Lenovo IdeaPad 5 15ITL05. 11th Gen Intel® Core™ i7-1165G7 @ 2.80GHz × 8 Nvidia MX450 Graphics shows up as NVIDIA Corporation / Mesa Intel® Xe Graphics (TGL GT2) X11/Xorg - ...
Rico Z's user avatar
  • 1
4 votes
0 answers
2k views

Ubuntu 22.04 after update screen brightness control disappeared from the bar and brightness is at 100%

I have Ubuntu 22.04.3 LTS running in my Dynabook laptop Intel i7-1165G7 as my daily development machine. Today, back to work after a few days of vacation, I did sudo apt update and sudo apt upgrade. ...
MrSparc's user avatar
  • 41
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0 answers
149 views

After installing Ubuntu 22.04 my keyboard backlight stopped working

Recently, I installed Ubuntu on my galaxy book 3 360 and the backlight of the keyboard doesn´t work anymore. When I power my laptop all the keyboard lights up, so they are working but after sometime ...
jotape's user avatar
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0 votes
0 answers
23 views

Bind a shotcut to temperature color adjusment (night mode activated)

I would like a hotkey/shotcut/keybinding to turn up or down the color temperature of the screen. Since I always have the night light mode enable but trough the day I just change it manually if I can't ...
veet's user avatar
  • 1
0 votes
1 answer
384 views

Cannot get brightness keys to work on Ubuntu 22.04 / Lenovo IdeaPad 5

I have IdeaPad 5 15IAL7 on Ubuntu 22.04 LTS, kernel 5.19.0-46-generic. It is Intel Core i5 with Intel Iris XE graphics. Special Fn keys all work, except the brightness. Volume is changing with ...
Deniss Kozlovs's user avatar
0 votes
0 answers
22 views

After dim screen it doen't turn on back

I noticed this problem the first time on a new laptop, on which I installed kubuntu 22.04. I unplugged the power cord and after 5 minutes of inactivity the screen went out. Then I found the ...
Arte's user avatar
  • 1
0 votes
0 answers
54 views

Having a set of troubles in Ubuntu 22.04.2 LTS / GNOME 42.5

Im having the following troubles and in need of help. At boot, it will show a black screen before coming to the login screen. then show the login screen twice (uneditable) and return to the black ...
Tharindu Deepaloka Munasinghe's user avatar
0 votes
0 answers
221 views

Brightness function keys not working in 22.04

I recently updated the BIOS (1.30.0) of my Dell Latitude 5480 laptop running with Ubuntu 22.04. Now the screen is darker (I can see the change while booting) and even xrandr --output eDP-1 --...
Duddy67's user avatar
  • 515
0 votes
0 answers
293 views

How do I fix inconsitent brightness with HDR turned on?

I have this weird issue with my monitor. I have the HDR turned on. And while adjusting my screen, if I changed the color/brightness slider in monitor settings or nvidia settings in ubuntu, it gives me ...
priosshrsth's user avatar
1 vote
1 answer
1k views

Brightness control not working with Ubuntu 22.04 on Lenovo X1 Yoga (OLED display)

Using the brightness control Fn+F5 and Fn+F6 is showing a bar that changes the status, but the screen brightness does not change on Ubuntu 22.04 on Lenovo X1 Yoga Gen 2. I can see the brightness ...
Soerendip's user avatar
  • 111

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