Low Birightness after restart KDE (desktop)

Since some days, my screen has been very dark after restarting my desktop PC.
I have to change the brightness manually on the screen.

I think KDE or the System changes brightness at startup.

Where can I set up the brightness on KDE?

Here some system informations:

  Device-1: AMD Lexa PRO [Radeon 540/540X/550/550X / RX 540X/550/550X]
    vendor: Sapphire driver: amdgpu v: kernel arch: GCN-4 code: Arctic Islands
    process: GF 14nm built: 2016-20 pcie: gen: 3 speed: 8 GT/s lanes: 8 ports:
    active: DP-1 empty: DVI-D-1,HDMI-A-1 bus-ID: 08:00.0 chip-ID: 1002:699f
    class-ID: 0300 temp: 52.0 C
  Display: x11 server: X.Org v: 21.1.11 compositor: kwin_x11 driver: X:
    loaded: amdgpu unloaded: modesetting alternate: fbdev,vesa dri: radeonsi
    gpu: amdgpu display-ID: :0 screens: 1
  Screen-1: 0 s-res: 2560x1440 s-dpi: 96 s-size: 677x381mm (26.65x15.00")
    s-diag: 777mm (30.58")
  Monitor-1: DP-1 mapped: DisplayPort-0 model: BenQ SW2700 serial: <filter>
    built: 2016 res: 2560x1440 hz: 60 dpi: 109 gamma: 1.2
    size: 596x335mm (23.46x13.19") diag: 684mm (26.9") ratio: 16:9 modes:
    max: 2560x1440 min: 720x400
  API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
    device: 1 drv: swrast surfaceless: drv: radeonsi x11: drv: radeonsi
    inactive: gbm,wayland
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: amd mesa v: 23.3.5-manjaro1.1
    glx-v: 1.4 direct-render: yes renderer: AMD Radeon RX 550 / 550 Series
    (radeonsi polaris12 LLVM 16.0.6 DRM 3.54 6.6.16-2-MANJARO)
    device-ID: 1002:699f memory: 3.91 GiB unified: no
  API: Vulkan v: 1.3.276 layers: 5 device: 0 type: discrete-gpu name: AMD
    Radeon RX 550 / 550 Series (RADV POLARIS12) driver: mesa radv
    v: 23.3.5-manjaro1.1 device-ID: 1002:699f surfaces: xcb,xlib

I use LTS Kenel 6.6.16.

Hi @mepi0011,

As far as I have it, screen brightness is controlled by the D.E. In Plasma it’s part of the Power Management. (Yes, even on my Desktop.)


So hope this helps!

1 Like

This topic was automatically closed 36 hours after the last reply. New replies are no longer allowed.