Error when changing color temperature

[hornsen]

Describe the bug I am using Ubuntu 22.04 in conjunction with my Docking Station ICY BOX USB-C Docking Station (11-in-1) for 2 Monitors (2x DisplayPort), 4K 60Hz, 6-fach USB 3.0 HUB, Gigabit Ethernet, Audio, Schwarz, IB-DK2242AC, and the LG 35WN65C LCD-Monitor.

When I open "Brightness-Controller" and set "Color Temperature" to anything except "default", then nothing happens. However, in console I get an error. The error only appears when I try to change color temperature. See log below.

version Brightness Controller v2.3.4

To Reproduce Steps to reproduce the behavior: "Brightness-Controller" and then set any Color Temperature

Expected behavior The color temperature to be changed.

Desktop (please complete the following information):

• OS: Ubuntu 22.04

Additional context

brightness-controller 
xrandr: Need crtc to set gamma on.
Traceback (most recent call last):
  File "/usr/share/brightness-controller/init.py", line 304, in change_value_pg
    Executor.execute_command(cmd_value)
  File "/usr/share/brightness-controller/util/executor.py", line 23, in execute_command
    subprocess.check_output(string_cmd, shell=True)
  File "/usr/lib/python3.10/subprocess.py", line 420, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.10/subprocess.py", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'xrandr        --output eDP         --brightness 1.0000000000000007        --gamma 1.0000000000000007:0.7800000000000005:1.0000000000000007' returned non-zero exit status 1.
xrandr: Need crtc to set gamma on.
Traceback (most recent call last):
  File "/usr/share/brightness-controller/init.py", line 317, in change_value_pb
    Executor.execute_command(cmd_value)
  File "/usr/share/brightness-controller/util/executor.py", line 23, in execute_command
    subprocess.check_output(string_cmd, shell=True)
  File "/usr/lib/python3.10/subprocess.py", line 420, in check_output
    return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
  File "/usr/lib/python3.10/subprocess.py", line 524, in run
    raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'xrandr        --output eDP         --brightness 1.0000000000000007        --gamma 1.0000000000000007:0.7800000000000005:0.5700000000000003' returned non-zero exit status 1.
QTextBrowser: No document for https://github.com/lordamit/Brightness

xrandr -q
Screen 0: minimum 320 x 200, current 3440 x 1440, maximum 16384 x 16384
eDP connected (normal left inverted right x axis y axis)
   1920x1080     60.00 +
   1680x1050     60.00  
   1280x1024     60.00  
   1440x900      60.00  
   1280x800      60.00  
   1280x720      60.00  
   1024x768      60.00  
   800x600       60.00  
   640x480       60.00  
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DVI-I-4-4 disconnected (normal left inverted right x axis y axis)
DVI-I-3-3 disconnected (normal left inverted right x axis y axis)
DVI-I-2-2 disconnected (normal left inverted right x axis y axis)
DVI-I-1-1 connected primary 3440x1440+0+0 (normal left inverted right x axis y axis) 820mm x 346mm
   3440x1440     99.98*+  84.96    59.97    49.99  
   1920x1080     60.00    60.00    59.94  
   1280x720      60.00    59.94  
   1024x768      60.00  
   800x600       60.32  
   720x480       60.00    59.94  
   640x480       60.00    59.94