% sudo ddcutil detect
Display 1
   I2C bus:             /dev/i2c-2
   EDID synopsis:
      Mfg id:           BNQ
      Model:            BenQ T2200HD
      Serial number:    blaaaa
      Manufacture year: 2010
      EDID version:     1.3
   VCP version:         2.0

Display 2
   I2C bus:             /dev/i2c-4
   EDID synopsis:
      Mfg id:           DEL
      Model:            DELL U2515H
      Serial number:    bluuuu
      Manufacture year: 2015
      EDID version:     1.3
   VCP version:         2.1