ddccontrol ioctl error

13:55:33 dbz@dbzix ~ $ ddccontrol -p
ddccontrol version 0.4.2
Copyright 2004-2005 Oleg I. Vdovikin (oleg@cs.msu.su)
Copyright 2004-2006 Nicolas Boichat (nicolas@boichat.ch)
This program comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of this program under the terms of the GNU General Public License.

Probing for available monitors..........
Detected monitors :
 - Device: dev:/dev/i2c-1
   DDC/CI supported: Yes
   Monitor Name: VESA standard monitor
   Input type: Analog
  (Automatically selected)
Reading EDID and initializing DDC/CI at bus dev:/dev/i2c-1...
ioctl(): No such device or address
ioctl returned -1
ioctl(): No such device or address
ioctl returned -1
ioctl(): No such device or address
ioctl returned -1
ioctl(): No such device or address
ioctl returned -1

DDC/CI at dev:/dev/i2c-1 is unusable (-1).
If your graphics card need it, please check all the required kernel modules are loaded (i2c-dev, and your framebuffer driver).