Unix and Linux Stack Exchange
Unix and Linux Stack Exchange

Questions tagged [backlight]

Question about controlling the background illumination of liquid crystal displays (LCDs). For issues about backlit keyboards, use "keyboard-backlight" instead.

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XF86MonBrightnessUp/XF86MonBrightnessDown special keys not working

I'm trying to enable some multimedia keys, and the ones for volume do work. F5 and F6, the ones for increasing/decreasing do not work, I do not know why. When I run in the terminal: xbacklight +10 I can see the working effect. When I try my binded…
TRogerx
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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 brightness slider on the display…
Thomas Luzat
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How can I change the backlight of an external monitor?

I have a laptop with an external monitor connected via HDMI (output name is HDMI1). The command xbacklight works only with my primary screen (which is the laptop screen). It doesn't work even if I try running it with argument -display HDMI1 (which…
Jezor
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"No outputs have backlight property" but xorg.conf is configured and xbacklight is installed

I'm using a Lenovo laptop with Intel video drivers, and I'm trying to control the brightness. I installed the xbacklight and xserver-xorg-video-intel packages, added these lines to /etc/X11/xorg.conf: Section "Device" Identifier "Card0" …
Michael A
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Set bindings in i3 to control keyboard backlight

For my i3 window-manager settings, I am looking for a command line tool, similar to xbacklight, but to control the brightness of the leds which are in the keyboard. Basically, I can set up the leds through a command line, but it requires to be…
perror
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xbacklight not working

I have my ASUS X556U with DualBoot between W10 and Debian Jessie, but I need to regulate the brightness. I've been serching in Google and I found xbacklight, but I have a problem while executing it: barreeeiroo@Debian-Diego ~> xbacklight -dec 10 No…
Diego Barreiro
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how to set acpi_osi parameter in the grub

This is a question about a problem I could fix but I do not know why the fix works. I wanted to be able to adjust the backlight from keyboard and the only thing which fixed that was changing a line in the grub…
Reyx_0
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How do I get my laptop screen backlight brightness controls to work?

What do I need to do to get my laptop screen backlight brightness controls to work? I currently have Ubuntu 13.04 and a Dell Studio 1558. After reading these two…
Aaron Hall
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Adjust backlight via DDC?

I'm looking for a simple way of adjusting an external monitor's backlight using DDC. Something like good-ddc-tool --monitor 0 --backlight 100 that just works without complicating things when a single monitor is connected (the common case). I've…
Andreas
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Brightness falls at 0 when plugging second monitor

This only happens when using Gnome. I have an Acer Aspire V3-772GTX54206G1TMakk laptop with an NVIDIA GeForce GTX 760M graphics card running Debian 8 (jessie) 64-bit, and I'm using Gnome 3.14.1. The problem is every time I plug in a second monitor…
Thibault Lemaire
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How do I turn off the backlight but leave the LCD on?

How do I set zero brightness on laptops that have a nonzero minimum brightness on the brightness control? The solution should work regardless of X. I.e. it should also work in the virtual terminals.
James Haigh
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Backlight control manjaro linux

I'm new to Arch/Manjaro. I've installed it onto my Sony Vaio Vpceh1m1e. I cannot change the backlight value. I've solved this before on ubuntu, add this line to the xorg.conf: Option "RegistryDwords" "EnableBrightnessControl=1" Somehow it doesn't…
erbal
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Turn off LCD backlight so that mouse and keyboard do not wake the screen

I'm trying to accomplish what I had in my old ASUS U36SG laptop: an Fn key turned the screen off. Hitting any key or touching the mouse/touchpad wouldn't wake the screen, only the same Fn combination would work. In my current laptop, Fn+F2 does…
Jeffrey Lebowski
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Control backlight as a user (without xbacklight)

I'm working on Gentoo and Intel modesetting driver for my video card. That's why xbacklight isn't working. I can write inside /sys/class/backlight... whith a root acount but that's not what I want to. I saw somebody using dbus-send and HAL, but…
Mathieu Van Nevel
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Sysfs LCD backlight as thermal device

I have Compaq CQ60-120ec notebook. I discovered that there is a directory /sys/class/thermal/cooling_device2. The type said LCD. I tried to control the cooling device, and it dimmed my backlight on the laptop. But I have question I cannot find…
Enginecrafter77
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