Mate brightness display

[robzane]

how to change brightness display?
thank you

[OldStrummer]

This thread might hep you:

Brightness steps control

Hello Don't know the command which from memory seems to be 5 per step but here on UM22.04.1 on Dell when I press fn key and brightness key and hold it down don't have to keep pressing it. Show in gif below. [br] Also in Control Center / Hardware / Power Manager is quick and can set a value. Not answer as I understand that you are looking for but options. [pm] Or a launcher [cc]

[robzane]

In
Control Center / Hardware / Power Manager
I cant find brightness control
I cant understand

[jymm]

System>Hardware>Power Mangement>On AC power tab>set display brightness to> adjust slider

or dconf editor gui: org>mate>power manager>brightness-ac mine is at 30.2

You can also turn keyboard backlight on and off from here.

[ugnvs]

I solved that problem using UM panel brightness applet:

[robzane]

I have no brightness control in power management preferences
dconf can't change brightness

[robzane]

applet does not work

[ericmarceau]

Are you using a Desktop with a detached monitor plugged-in?

If so, my understanding is that the only control offered is by the monitor itself. UM will not have control over that, as far as I know.

# inxi -a -G

Graphics:
  Device-1: AMD RS780D [Radeon HD 3300] vendor: ASUSTeK driver: radeon
    v: kernel alternate: amdgpu ports: active: VGA-1 empty: DVI-D-1
    bus-ID: 01:05.0 chip-ID: 1002:9614 class-ID: 0300
  Display: server: X.Org v: 1.21.1.4 compositors: 1: Picom v: 9 2: marco
    v: 1.26.0 driver: X: loaded: ati,radeon unloaded: fbdev,modesetting,vesa
    gpu: radeon display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1440x900 s-dpi: 96 s-size: 381x238mm (15.0x9.4")
    s-diag: 449mm (17.7")
  Monitor-1: VGA-0 mapped: VGA-1 model: HP w1707 serial: CNC918Q23B
    built: 2009 res: 1440x900 hz: 60 dpi: 99 gamma: 1.2
    size: 370x230mm (14.6x9.1") diag: 436mm (17.2") ratio: 16:10 modes:
    max: 1440x900 min: 720x400
  OpenGL: renderer: AMD RS780 (DRM 2.50.0 / 6.8.0-45-generic LLVM 15.0.7)
    v: 3.3 Mesa 23.2.1-1ubuntu3.1~22.04.3 compat-v: 3.0 direct render: Yes

[robzane]

I'm using a desktop pc with a monitor

[robzane]

the problem is that i change brightness with monitor buttons but i can't change brightness

[DaveHighland]

Hi @robzane! Can you please post the make and model number of your monitor?

[robzane]

Yes thank You
AOC model 27B2G5

[DaveHighland]

I checked their website (aoc.com) and searched for 27B2G5. The site said it couldn't find that model. The problem may be that I am in Arizona, and the site is only showing me AOC products available in the USA.

May I ask, in what country did you purchase this monitor?

[tkn]

Are you looking for something like this ?

( You can install this by copying and pasting the code below into a terminal and press enter: )

# this will add the ddcui repository, installs ddcui and also
# replaces the corresponding desktopfile with a version that actually works

sudo add-apt-repository ppa:rockowitz/ddcutil &&
    sudo apt update && sudo apt install ddcui &&
cat<<\DDCUI | sudo tee "/usr/share/applications/ddcui.desktop"
[Desktop Entry]
Version=1.1
Name=ddcui
GenericName=Monitor Settings
Comment=Control monitor settings
Keywords=ddcutil;DDC/CI;MCCS
Exec=sh -c "pkexec env DISPLAY=$DISPLAY XAUTHORITY=$XAUTHORITY DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS XDG_RUNTIME_DIR=/run/user/0 ddcui"
Icon=ddcui
Terminal=false
Type=Application
Categories=Settings;HardwareSettings;
X-Desktop-File-Install-Version=0.24
DDCUI

Or do you want to use gamma correction to adjust your brightness ?

[robzane]

I'm in Europe, in Italy

[DaveHighland]

Just to clarify the situation: Are you saying that you can control your monitor's brightness using the physical buttons on your monitor, but that you cannot find any way to control your monitor's brightness using software (the operating system or an app)?

[Philippe]

May be my script can help you, to set brightness

Notification area icon to set screen's brightness

Hello, Small script to add an icon in the notification area, to set the screen's brightness, by right clic. Usefull in specific situation. yad is required: sudo apt install yad #!/bin/bash # Script to add an icon in the notification area, # to set the screen's brightness, by right clic # Require yad : sudo apt install yad get_active_monitors() { xrandr | awk '/\ connected/ && /[[:digit:]]x[[:digit:]].*+/{print $1}' } # Name of the screen DisplayName=$(get_active_monitors) # set by d…

[robzane]

I ask: i think it is better to disable wayland and use birghtness control that works on x11

[tkn]

There is no wayland anywhere!

Ubuntu- MATE only runs on X11, it does not and can not run on Wayland (yet).

You have to use brightness control that works on X11.

And guess what? That is what this thread is giving you:
Already two apps to make your wish come true.

[robzane]

if mate run on x11 why brightness control does not work?