Software brightness breaks

Hello,

I'm experiencing a problem that after waking from sleep my software brightness change stops working. Logging out of session fixes the problem. I'm kinda newbie in Linux so I cannot provide a lot of valuable information by myself.

OS: Debian 13 stable

Kernel: 6.12.86+deb13.1-amd64

DE: KDE 6.3.6

Frameworks: 6.13.0

QT: 6.8.2

```bash

# When monitors function correctly
oles@debian ~$ kscreen-doctor -o
Output: 1 eDP-1
       disabled
       connected
       priority 0
       Panel
       Modes: 1:2560x1600@60! 2:2560x1600@48 3:1920x1200@60 4:1920x1080@60 5:1600x1200@60 6:1680x1050@60 7:1280x1024@60 8:1440x900@60 9:1280x800@60 10:1280x720@60 11:1024x768@60 12:800x600@60 13:640x480@60 14:2560x1440@60* 15:1600x900@60 16:1368x768@60
       Geometry: 0,0 1766x994
       Scale: 1.45
       Rotation: 1
       Overscan: 0
       Vrr: incapable
       RgbRange: unknown
       HDR: incapable
       Wide Color Gamut: incapable
       ICC profile: none
       Color profile source: sRGB
       Color power preference: prefer efficiency and performance
       Brightness control: supported, set to 60% and dimming to 100%
Output: 2 HDMI-A-1
       enabled
       connected
       priority 1
       HDMI
       Modes: 17:3440x1440@50! 18:3440x1440@100* 19:3440x1440@60 20:2560x1440@60 21:2560x1080@60 22:2560x1080@60 23:2560x1080@60 24:1920x1200@50 25:1920x1080@60 26:1920x1080@60 27:1920x1080@60 28:1920x1080@50 29:1600x1200@50 30:1680x1050@60 31:1600x900@60 32:1280x1024@75 33:1280x1024
@60 34:1440x900@60 35:1280x800@60 36:1152x864@75 37:1280x720@60 38:1280x720@60 39:1280x720@60 40:1280x720@50 41:1024x768@75 42:1024x768@70 43:1024x768@60 44:832x624@75 45:800x600@75 46:800x600@72 47:800x600@60 48:800x600@56 49:720x576@50 50:720x480@60 51:720x480@60 52:640x480@75 53
:640x480@73 54:640x480@67 55:640x480@60 56:640x480@60 57:720x400@70 58:1600x1200@60 59:1600x1200@100 60:1280x1024@100 61:1024x768@100 62:1920x1200@60 63:1920x1200@100 64:1280x800@100 65:2560x1440@100 66:1920x1080@100 67:1600x900@100 68:1368x768@60 69:1368x768@100 70:1280x720@100
       Geometry: 0,0 2752x1152
       Scale: 1.25
       Rotation: 1
       Overscan: 0
       Vrr: incapable
       RgbRange: unknown
       HDR: incapable
       Wide Color Gamut: incapable
       ICC profile: none
       Color profile source: sRGB
       Color power preference: prefer efficiency and performance
       Brightness control: supported, set to 100% and dimming to 100%

#
#
# And when breaks
#
#
oles@debian ~$ kscreen-doctor -o
Output: 1 eDP-1
       disabled
       connected
       priority 0
       Panel
       Modes: 1:2560x1600@60! 2:2560x1600@48 3:1920x1200@60 4:1920x1080@60 5:1600x1200@60 6:1680x1050@60 7:1280x1024@60 8:1440x900@60 9:1280x800@60 10:1280x720@60 11:1024x768@60 12:800x600@60 13:640x480@60 14:2560x1440@60* 15:1600x900@60 16:1368x768@60
       Geometry: 0,0 1766x994
       Scale: 1.45
       Rotation: 1
       Overscan: 0
       Vrr: incapable
       RgbRange: unknown
       HDR: incapable
       Wide Color Gamut: incapable
       ICC profile: none
       Color profile source: sRGB
       Color power preference: prefer efficiency and performance
       Brightness control: unsupported
Output: 2 HDMI-A-1
       enabled
       connected
       priority 1
       HDMI
       Modes: 17:3440x1440@50! 18:3440x1440@100* 19:3440x1440@60 20:2560x1440@60 21:2560x1080@60 22:2560x1080@60 23:2560x1080@60 24:1920x1200@50 25:1920x1080@60 26:1920x1080@60 27:1920x1080@60 28:1920x1080@50 29:1600x1200@50 30:1680x1050@60 31:1600x900@60 32:1280x1024@75 33:1280x1024
@60 34:1440x900@60 35:1280x800@60 36:1152x864@75 37:1280x720@60 38:1280x720@60 39:1280x720@60 40:1280x720@50 41:1024x768@75 42:1024x768@70 43:1024x768@60 44:832x624@75 45:800x600@75 46:800x600@72 47:800x600@60 48:800x600@56 49:720x576@50 50:720x480@60 51:720x480@60 52:640x480@75 53
:640x480@73 54:640x480@67 55:640x480@60 56:640x480@60 57:720x400@70 58:1600x1200@60 59:1600x1200@100 60:1280x1024@100 61:1024x768@100 62:1920x1200@60 63:1920x1200@100 64:1280x800@100 65:2560x1440@100 66:1920x1080@100 67:1600x900@100 68:1368x768@60 69:1368x768@100 70:1280x720@100
       Geometry: 0,0 2752x1152
       Scale: 1.25
       Rotation: 1
       Overscan: 0
       Vrr: incapable
       RgbRange: unknown
       HDR: incapable
       Wide Color Gamut: incapable
       ICC profile: none
       Color profile source: sRGB
       Color power preference: prefer efficiency and performance
       Brightness control: unsupported

```