Questions tagged [brightness]

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Is there any AI program to auto adjust brightness, contrast, gamma values of camera according to environment lighting? like smartphones do

In smartphones, one can see how quickly it identifies faces and adjusts brightness, colour saturation and all other settings. Similarly, I am looking for some applications for Linux. Till now, I found ...
Amit's user avatar
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How to increase/decrese brightness in smaller values?

Is there a way I can decrease or increase my monitor brightness level in smaller percentage values (like 1% or 2%) rather than 5% on Linux Mint? Also, I would the fix to work with my function keys as ...
Dex's user avatar
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1 answer
63 views

Syntax error in sudoers file

I wanted to allow my ordinary user to run /usr/bin/brightnessctl to turn on/off the keyboard backlight on my laptop, so I did visudo -f /etc/sudoers.d/grove (grove is my username, but all that ...
Henrik supports the community's user avatar
1 vote
0 answers
32 views

Linux on my machine forgets screen brightness setting after login

I have an old Dell Latitude laptop and I have been running Linux on it for a few years without any problems. But about a month ago, anytime I start the computer and log in, or do a screen lock and log ...
ironfish's user avatar
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2 votes
1 answer
281 views

Pop os brightness stuck at maximum

So I've encountered this problem every time I installed linux on my laptop. I've asked it before here, but that didn't go well. Now I'v installed Pop OS (22.04) and I'm fully committed to it, it's not ...
III_phr's user avatar
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41 views

Finding the brightness and R,G,B combination being used in a desktop monitor

I have two desktop computers. The first one is: Lenovo. Description: Ubuntu 16.04.7 LTS, Release: 16.04, codename: xenial. The second one is: Dell Inspiron. Description: Ubuntu 18.04.5 LTS, Release: ...
Nikhil Kumar's user avatar
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245 views

Pop OS 22.04 - Brightness control not working on Acer Nitro 5

Brightness control is not working on my new Acer Nitro 5 (Model: AN515-58-59JP, 12th Gen Intel Core i5 12450H, Nvidia 3050) after installing Pop OS 22.04; Nvidia proprietary drivers are installed (535)...
abhijeet verma's user avatar
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42 views

Gnome DE brightness setting is not remembered after screen lock

I am using Rocky Linux 8.x workstation with Gnome DE for a couple of years now with no problems. About a week ago the following issue comes up: If I lock the screen using eg the Super(Win) key-L, and ...
ironfish's user avatar
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36 views

brightness stuck at minimum

when i lower the brightness to a certain low degree (way over 0) the screen goes dark and is stuck thus; only with the use of a flashlight and the room in the dark i can barely see the screen. this is ...
ntrpris's user avatar
1 vote
1 answer
484 views

Automatically changing screen brightness in Fedora 38

When the brightness is not maximum, it automatically changes either increases or decreases randomly. There is no brightnessctl installed, so that's not the problem. This has been happening since ...
pushpa's user avatar
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Dell XPS 15 9520 Screen Brightness not detected in Fedora

Fedora 38 doesn't detect the laptop screen brightness capability after a fresh install, before it was working fine, Debian and Ubuntu do, what could be the reason, Fedora installation media even comes ...
logicito's user avatar
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58 views

Debian 11: Brightness does not work on ASUS VivoBook

I know there are many other similar topics. However, I've tried all other solutions such as changing kernel parameters in grub file, using xbacklight, etc. However, there is no success yet. I'm ...
Mostafa Fakhraei's user avatar
0 votes
1 answer
618 views

Brightness control not working on IdeaPad 3 17ABA7 (amdgpu)

I have a Lenovo IdeaPad 3 17ABA7 with a fresh Debian Bullseye installation. Unfortunately the screen brightness control doesn't work out of the box. lspci lists the following video device: 04:00.0 VGA ...
scai's user avatar
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141 views

How do I reduce screen brightness and activate keyboard on Chromebook for Puppy Linux?

I am trying to get into Linux. I installed Puppy Linux on a USB drive and have succesfully booted on a Chromebook (specifically: https://www.notebookcheck.net/Acer-Chromebook-11-N7-C731-C8VE.206948.0....
Alisend's user avatar
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73 views

Zoom brightness missconfiguration when sharing my screen

I have a fresh Arch linux installation (it's my first time on Arch I work mostly on Oracle Linux), so far I have my windowing system working (I'm using Xmonad + Lightdm) just fine, I also changed the /...
ca-hercor's user avatar
1 vote
3 answers
924 views

Brightness Settings on my HP laptop do not work on Debian 11 (Bullseye)

Hi good day everyone I have an HP 15-n220ca laptop computer on my Debian 11 Bullseye operating system running LXQt, and I am having trouble to turn down the brightness on my laptop screen. It is all ...
Michael Lanfield Raw Vegan's user avatar
1 vote
0 answers
579 views

Can't Change Screen Brightness on Fedora on iMac

I installed Fedora Linux 35 on my iMac(21.5", Late 2009). It is working fine except that I can't control screen brightness neither through my keyboard(Apple's own keyboard) shortcuts nor the ...
Can Sürmeli's user avatar
2 votes
2 answers
1k views

Changing brightness only works after system resumes from sleep

I have a Lenovo Legion Slim 7 laptop (15ACH6) running Manjaro 21.2.3 on kernel 5.17. The problem I am facing is that on a clean boot, I cannot change the system brightness (using Fn keys or changing ...
Alexandru Dinu's user avatar
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0 answers
271 views

Dell XPS 9360 FN brightness keys not detected Manjaro

I have Manjaro installed in dual boot on a Dell XPS 9360 with FHD screen non touchscreen. The key combo to increase/decrease the screen brightness are Fn+F11 and Fn+F12. This works perfectly on ...
Pablohoney's user avatar
0 votes
3 answers
3k views

How do I "get write permission for device files" in Linux?

I have just install brightnessctl to control my screen brightness, but can only run it as root. Doing otherwise prints the suggestion I "get write permission for device files". What is the ...
tsvallender's user avatar
1 vote
1 answer
788 views

KDE Plasma changes brightness on wrong GPU

I am able to change brightness manually by issuing the command: echo 512 | sudo tee - /sys/class/backlight/intel_backlight/brightness This changes the brightness output of my Intel integrated GPU on ...
Dj Sushi's user avatar
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0 votes
2 answers
279 views

Autokey - Adjusting Screen Brightness with Hotkeys (and sustaining that brightness in Awesome Window Manager)

In awesome window manager, my screen brightness gets reset to 100% each time I'm away from my computer for a few minutes. How can I get it to sustain the brightness I set prior to these screen-saver/...
Lonnie Best's user avatar
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1 vote
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1k views

Debian: Brightness control does not work

I have just installed Debian on my Acer Aspire laptop; it has a Ryzen 5 CPU and a Radeon Vega AMD card. All is going pretty much fine, only problem is I can't change the screen brightness! I have ...
Noumeno's user avatar
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2 answers
640 views

Awesome Doesn't Know My Brightness Ajustment Buttons

After installing Awesome (with no other GUI environments), the function keys on my laptop (for brightness especially), don't work like they do when I install KDE or GNOME. So far, the only method I've ...
Lonnie Best's user avatar
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1 vote
0 answers
193 views

Applet to Control Brightness on Each Monitor

Using Awesome, I'm looking for a system tray applet that can control the brightness of each monitor. Using apt search I found a package called budgie-brightness-controller-applet, which was intended ...
Lonnie Best's user avatar
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0 votes
2 answers
148 views

How to subscribe to screen dim event on linux

I have a script which corrects my screen brightness based on an ambient light sensor. I want it to stop changing my screen brightness when my screen dims as a result of user inactivity. How can I ...
nicolai's user avatar
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2 votes
1 answer
696 views

Script to increase/decrease brightness

My keyboard doesn't have the Fn key also on Openbox I am not sure if that works. I can use: # Default 1 ignores monitor setting, allows increasing a lot. <br> xrandr --output DP-2 --brightness 0....
Scorpion's user avatar
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2 votes
0 answers
58 views

Problems with brightness media buttons

While setting up hotkeys in my window manager I find out that if I would press the brightnessup\brightnessdown button(which changes brightness as it should) and after that go to terminal, pressing '...
TheShellOfAMan's user avatar
1 vote
1 answer
2k views

Remap backlight/brightness to other keys on XFCE

I have a laptop with Manjaro XFCE and I damaged my F2 and F3 keys, which operate the brightness of the display (up and down respectively) while holding the Fn key. The xfce-power-manager works fine, ...
PolGZ's user avatar
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1 vote
0 answers
110 views

External monitors and backlight control of internal monitor don't work with ThinkPad E14 Gen 3 (AMD Ryzen 5500U)

I have installed a Debian Sid with kernel version 5.10.0-7-amd64 on my new ThinkPad device. When I connect external monitors via the Lenovo USB-C dock or even the internal HDMI socket, they are not ...
Jonathan Weth's user avatar
0 votes
2 answers
466 views

Linux Mint on Lenovo E14 brightness cannot be adjusted

I'm new to this world. So the F5/F6 function keys basically don't work. I tried a few online solutions regarding changing grub, no luck. I found out that there is no file in /sys/class/backlight/, no ...
Jing's user avatar
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1 vote
0 answers
3k views

Brightness and volume key bindings not working in dwm

I'm trying to get my volume and brrightness keys to work using dwm. I put this into dwm/config.h: static const char *upvol[] = {"/usr/bin/pactl", "set-sink-volume", "0", &...
J H's user avatar
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1 vote
0 answers
3k views

Can't adjust laptop screen brightness on Ubuntu 20.10 equivalent

I'm dual-booting a laptop (Dell Precision 7550) between Windows 10 and pop!_os 20.10, equivalent to Ubuntu 20.10. I have an issue regarding screen brightness. The laptop is stuck at a certain mellow ...
frustrated_bioinformatician's user avatar
3 votes
1 answer
2k views

Brightness Issue, Lenovo, Fedora 33

I'm having the brightness issue, where screen brightness doesn't change, on a Lenovo Legion Y740 with Fedora 33 that I haven't been able to solve yet. Here's the output of lspci | grep VGA: 00:02.0 ...
drezap's user avatar
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0 votes
1 answer
251 views

Brightness only changes after reboot on 2020 Dell XPS 13 running KDE Neon 5.20

I am running KDE Neon 5.20 on a 2020 Dell XPS 13. In /etc/default/grub I have acpi_backlight=vendor for GRUB_CMDLINE_LINUX_DEFAULT, because for any other setting I get nothing in /sys/class/backlight. ...
Ruff480's user avatar
4 votes
2 answers
2k views

How to write a script that edits brightness file in /sys/class/backlight/ideapad/?

I am using i3 wm and I've got my brightness file in /sys/class/backlight/ideapad/brightness. ╰─$ ls -la /sys/class/backlight/ideapad/ -rw-r--r-- 1 root root 4096 Dec 18 16:55 brightness When I want ...
Burak Kaymakci's user avatar
-1 votes
1 answer
214 views

Brightness control

I am using Asus ROG laptop with ubuntu installed, I am not able to change my brightness from keyboard(fn+down arrow).However I have option to change from the GUI. Can someone help me please? Thanks in ...
Arun Kumar's user avatar
8 votes
2 answers
8k views

Backlight control not working on Lenovo IdeaPad Gaming 3 with Renoir / AMDGPU

The brightness (LCD backlight) controls on a Lenovo IdeaPad Gaming 3 (15ARH05, LCD display, AMD Renoir CPU Ryzen 5 4600H, discrete NVIDIA GeForce 1650 Ti Mobile) are not working: Fn keys show the ...
Thomas Luzat's user avatar
1 vote
1 answer
128 views

Brightness can only go 1 level lower/higher on Fedora 32

First, I have to say that I'm completely new to linux and Fedora. So, please tell me the steps needed if you need more details. The problem is like this: I'm on max brightness and then lower it by 1 ...
Erick Christian's user avatar
0 votes
1 answer
508 views

Can't detect monitor brightness keys in Wayland, but they are detected in X

I'm trying to slowly shift my way towards Wayland, but I'm having some trouble with my laptop's media keys. On X, all the ones I need are supported no problem, but when I switch over to Sway, I'm not ...
rarelyNecessary's user avatar
1 vote
0 answers
272 views

Redshift prevents manual backlight adjustment (LXQt)

Redshift seems to work fine, dimming my screen with the red tint at night, but when Redshift is running (whether actively enabled or not) I cannot control laptop brightness with the laptop brightness ...
Crabgrass0899's user avatar
3 votes
0 answers
454 views

Brightness automatically getting changed

I am using ‘xrandr —output —brightness 0.7’ in Kali Linux to control brightness and its working cool but sometimes brightness is getting changed automatically and I am stuck here. Same happening in ...
Lakshmipathi's user avatar
0 votes
1 answer
269 views

Dim the screen using software instead of hardware in Ubuntu 20.04

I have a Thinkpad P52 which has the issue of PWM flickering if the brightness is lowered using the hardware keys. I've tried installing Desktop Dimmer both via source and the deb package but it fails. ...
An SO User's user avatar
0 votes
1 answer
1k views

How do I enable back-light controls without making my display flicker?

I am new to Linux and I am using Debian Testing with KDE Plasma installed during the installation process(i.e. tasksel). I had a problem with my brightness controls (the Fn keys or the brightness ...
Tanmay B's user avatar
2 votes
1 answer
2k views

Backlight adjustment controls not working

So, like many other users, I can't set the brightness of my laptop using Fn keys or the brightness controls on settings. I have tried all the solutions that I could fine but nothing happens. Updating ...
potato's user avatar
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1 vote
1 answer
224 views

What does the exclamation mark mean in udev rule?

I'am trying to get the brightness control keys (fn + arrows) to work on Arch Linux x64. So, i get a look into udev rule for my integrated ps/2 laptop keyboard using udevadm info: P: /devices/...
khokm's user avatar
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0 answers
783 views

Brightness keys not recognized

I use use an HP Elitebook 840 G6 with Arch linux, and it seems that the brightness keys are not recognized. I can change the brightness by writing to /sys/class/backlight/..., so the problem really ...
Rastapopoulos's user avatar
0 votes
1 answer
1k views

Can't find brightness controls in Linux Mint

I installed Linux Mint recently and then installed Nvidia drivers on my machine. There doesn't seem to be any brightness controls and the brightness keys arent working also. This happened after I ...
kramer's user avatar
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1 vote
0 answers
575 views

Unable to change brightness on fedora 31

I recently bought a Lenovo y7000. I have installed fedora 31 and configured the nvidia drivers for it also. Everything works fine but my brightness is stuck at maximum. I cannot change it via the ...
leoOrion's user avatar
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0 votes
5 answers
7k views

Why doesn't Linux support OLED screens brightness control?

AFAIK, currently, all laptop OLED screens are Samsung screens, and they all use Pulse-Width Modulation (PWM) to adjust brightness. Windows support this feature, while Linux doesn't... Where should ...
Or Harel's user avatar
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