Questions tagged [brightness]

Questions related to screen brightness.

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"xrandr --output XWAYLAND0 --brightness 0.50" doesn't work on ubuntu 22.04 LTS terminal

Before I was using ubuntu 20.04 LTS and the same command works fine. Now I change my laptop to MI Notebook Pro and install ubuntu 22.04 LTS which is a latest version of ubuntu and now xrandr --output ...
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210 views

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 on a desktop PC

I have an Aerofara Aero Pro 2, a desktop mini-PC with Intel N5105 CPU. After upgrading from Ubuntu 21.10 to Ubuntu 22.04 LTS I noticed that in the top right menu there's a "Brightness" ...
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Suspend, brightness and power button not working on Ubuntu 22.04

Currently, I'm using Ubuntu 22.04. I am not able to shut down my laptop using the power button as it's not showing any dialog box. I can only force the shutdown of the PC. And after suspending the PC ...
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Unable to adjust brightness on Ubuntu 20.04

I am on Lubuntu 20.04, and the brightness controls in the settings and in brightness-controller are not working. From Ubuntu 20.04 brightness adjust not working, I tried using brightness controller ...
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Why is my laptop main screen backlight not working?

I'm using a live USB drive and I'm trying to install Ubuntu 22.04 on my Dell Precision 7710 with Nvidia Quadro M3000M GPU and I'm facing a weird problem. My current graphics setup consists of two ...
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22.04 jammy shows no brightness sliders under Settings > Power

Is this an intentional change in 22.04 LTS? Or is something just not recognizing the hardware correctly? Previously, I had both a Screen Brightness and Keyboard Brightness slider visible under ...
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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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Brightness control of secondary display (Ubuntu 22.04)

I used the following command xrandr -q | grep " connected" output was XWAYLAND0 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 530mm x 290mm XWAYLAND1 connected ...
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flickering screen on laptop when on battery

I have a flickering screen when I remove the power on my laptop. I never had this issue, just having this all of the sudden (on ubuntu 21.04 and upgrade to 21.10 didn't change). the issue disappears ...
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Keyboard brightness and fingerpring sensor not working on Samsung Galaxy Book Pro 360

I'm very new to Linux and decided to install ubuntu when buying my new laptop a few days ago. Everything else has worked flawlessly, but I can't adjust the keyboard brightness or get the fingerprint ...
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Brightness slider not working in 20.04 with Radeon card

I tried to fix with this but nothing works. BTW my Radeon card is R4 Graphics
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Screen brightness not being controlled and HDMI is not detected in Ubuntu 18.04

Mine is a Dell Inspiron 5515 laptop with AMD Ryzen 5 processor. I am not being able to adjust my screen brightness and HDMI is not being detected on Ubuntu 18.04 LTS. I tried almost everything ...
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Brightness control on Gnome 20.04.3 LTS

Is there any Linux OS that has working brightness controls i.e. using a keyboard or a "slider" in settings? I'm using an iMac/Intel and booting from an external drive which presumably adds ...
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Screen brightness F keys not working for Ideapad 3 laptop

I'm just curious if Ubuntu developers are working on a fix for the missing screen brightness -/+ F keys for future Ubuntu updates. I have a Lenovo Ideapad 3 laptop and have read that the screen ...
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Screen looks very dim, but when changing to a higher resolution, the remaining part is in normal brightness

I am using Ubuntu 20.04 and this is an image of what I am describing
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How to list all available brightness settings with ddcutil

I know I can see the current and max values with ddcutil getvcp 0x10 VCP code 0x10 (Brightness ): current value = 75, max value = 100 But is there a way to see all the ...
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No option for brightness change in ASUS VivoBook

There is no option for brightness change in my laptop, my laptop is ASUS VivoBook. In settings there is keyboard brightness but no option for background brightness. I also changed ...
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Screen brightness goes to 10-15% when charger plugs

I have Ubuntu 21.10 installed on Lenovo Ideapad Gaming 3 with Ryzen 4600H and GTX1650. The screen brightness have several problems with user interface. First one is after the reboot or turning on the ...
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Brightness resetting to 100% on every startup

This question has been asked many times by many users, but there is no definate answer and it still remains an open bug even after all this time. This appears to be a problem with Ubuntu on some ...
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How do I reset ratbagctl settings?

I used ratbagctl because I want to change some settings of my Logitech G102 Mouse, but I want to restore the settings of the LED. What should I do? I have given information about my mouse below. $ ...
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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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brightness adjustment not working in dell inspiron 15 300 laptop with os ubuntu 20.04 lts

brightness adjustment not working in dell inspiron 15 300 laptop i tried in /etc/X11/xorg.conf file Section "Device" Identifier "Device0" Driver "intel" Option ...
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Why would an application window go dark?

Kubuntu 21.10 Working along, minding my own business when all of a sudden the application I'm in goes dark, like someone dimmed the lights. I can still use the application, and it doesn't affect ...
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3 votes
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brightness of the screen according to area

I have a serious problem with my eyes. I want to adjust the brightness level of the screen according to the area of the screen. For instance, I would like to only brighten two or three lines when I ...
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Brightness changing even when auto brightness is disabled

I have a new (July 2021) Dell XPS Laptop running Ubuntu 20.04.3 LTS I have turned OFF Automatic Brightness and manually set the brightness that I want. But after rebooting often the brightness resets ...
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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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Yoga 12 weird tabletmode behavior

I'm running Ubuntu 20.04.3 LTS with kernel 5.13.0-28-generic. The Lenovo Yoga 12 has a 180 degree foldable display. When folding the screen it changes into what I call tabletmode and the keyboard and ...
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Function brightness key is not working

I have a Lenovo IdeaPad 3 15ITL6. Only function brightness key is not working and all the other's function keys are working perfectly except brightness keys. Please help me out of this situation.
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257 views

Display brightness resets after rebooting

I am working on a XMG Core 15 with Ubuntu 20.04. (kernel 5.11.0.27-generic since the newer ones cause problems with my screens) and a NVIDIA GeForce RTX 2060 (NVIDIA driver 470) and AMD Ryzen 7 4800H. ...
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2 votes
1 answer
227 views

Full brightness on startup after the recent update

After every reboot, my laptop, on startup is on with 100% brightness. I have to manually turn it down using the function keys everytime. Generally, the default start-up brightness used to be around 20%...
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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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Display brightness is not changed by changing brightness file

I recently re-installed Ubuntu 21.10 on my laptop and found that Fn+F5/F6 don't work for adjusting the display brightness. I've had this problem before and usually just run xrandr --output DP-2 --...
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35 views

Change hardware backlight brightness with Radeon card

I am trying to change the backlight brightness of my monitors from the command line on Ubuntu 20.04.3 LTS. My monitors are Dell Ultrasharp (1x U2719D and 2x U2419H connected in series via display port)...
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141 views

Brightness control for HDMI monitor

I cannot get the Ubuntu brightness slider to change the brightness of my (Dell) monitor which is attached by HDMI. I am using 21.10. This is a desktop system with no built in monitor. I can control ...
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Cannot increase or decrease brightness in Ubuntu 20.04 LTS

In my Ubuntu 20.04 LTS, there is some issue with brightness. It becomes unstable and I cannot increases or decrease brightness. In the login page where the users login, it works properly. Can anyone ...
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104 views

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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1 answer
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Cannot boot into newly installed Ubuntu 20.04 from GRUB

I have just installed Ubuntu 20.04 alongside windows 10 inside my MS1 modern 14 B4MW (AMD Ryzen 5 4500u, integrated graphics, 8GB RAM) using a USB. When trying to install Ubuntu, I was getting some ...
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Installing KDE broke Unity Volume/Screen controls

I have been using Unity for a long time but decided it was time to give another envornment a try. I installed KDE Plasma on my machine and kept LightDM as my display manager. Logged in using KDE to ...
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Unable to boot into Ubuntu 18.04 after latest update

I am currently using a lenovo IdeaPad340-17API and on it I have both windows 10 and Ubuntu 18.04 installed. Since yesterday after I updated Ubuntu, now when I try to boot into Ubuntu I get stuck on a ...
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Screen brightness is flickering up and down randomly on Ubuntu 20.04 [duplicate]

My screen brightness keeps going up and down randomly on Ubuntu 20.04. My screen resolution is 2160x1440.
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1 answer
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21.10 : Brightness stopped working (yes one more topic about that... :/ )

I saw many threads about this but sadly none helped.... so here comes back the brightness problem on Ubuntu 21.10. Problem On Ubuntu 21.10 brightness control stopped working, brightness is now always ...
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1 answer
666 views

How to fix brightness keys not working in Ubuntu 20.04 LTS

I recently ran into a problem regarding my brightness control on my Lenovo Ideapad S145. The brightness keys are not working, and the slider in the top right corner is not working either. A couple ...
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screen brightness suddenly dimmed and now won't go above 50%

I was just working on my computer doing nothing particularly interesting and my brightness suddenly dimmed and won't go back up above 50%. I can control the slider and I tried manually adjusting with ...
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External monitor Brightness and Contrast* control GUI

I've just installed Ubuntu a few days ago and I want to be able to control the brightness and contrast of my external monitor (LG 27 inch 4K display) with ease. I've documented and there are a few ...
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60 views

Screen brightness appears to be set to minimum, but my laptop screen is full bright

I have a problem in Ubuntu 21.10 with my laptop screen brightness. After restart my screen is set to maximum, but the settings shows something else. $ cat /sys/class/backlight/amdgpu_bl0/...
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1 vote
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Ubuntu 18.04 Display brightness not working - Unknown Display in settings

I have a new ThinkPad E15 Gen 3 link to Lenovo's website that I purchased less than a month ago. I installed Ubuntu 18.04 on it and the installation went smoothly. However, when I tried to change the ...
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Can't find the brightness slider and open Ubuntu Software (Ubuntu 20.4.3 LTS)

I recently installed ubuntu 20.4.3 in dual boot with Windows 10 on my laptop. Everythings works normaly expect two things: -I can't open the Ubutun Software manager -Can't find the brightness slider (...
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