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ddcutil

 
Control the settings of connected displays via DDC/CI. This command requires the kernel module i2c-dev to be loaded. See also: modprobe. More information: https://www.ddcutil.com.
 
  • List all compatible displays:
     
    ddcutil detect
     
  • Change the brightness (option 0x10) of display 1 to 50%:
     
    ddcutil --display {{1}} setvcp {{10}} {{50}}
     
  • Increase the contrast (option 0x12) of display 1 by 5%:
     
    ddcutil -d {{1}} setvcp {{12}} {{+}} {{5}}
     
  • Read the settings of display 1:
     
    ddcutil -d {{1}} getvcp {{ALL}}

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