Mate brightness display

how to change brightness display?
thank you

This thread might hep you:

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

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.

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I solved that problem using UM panel brightness applet:

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

applet does not work

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

2 Likes

I'm using a desktop pc with a monitor

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

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

Yes thank You
AOC model 27B2G5

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?

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 ?

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I'm in Europe, in Italy