Editing Display Data Channel (section)

==Disabling DDC==
Some [[KVM switch]]es (keyboard-video-mouse) and video extenders handle DDC traffic incorrectly, making it necessary to disable monitor plug and play features in the operating system, and maybe even physically remove pin 12 (serial data pin) from the analog VGA cables<ref>
  {{cite web
    | url = http://nookkin.com/content/allowing-any-screen-resolution-on-vista.php
    | title = Allowing any screen resolution on Vista
    | author = Lyosha Blinnikov
    | quote = I performed this mod on an old 6" patch cable that was previously used for connecting a 3D accelerator. I call it my "freedom cable", as it can be connected to any monitor to temporarily disable its EDID :D
  }}
</ref> that connect such device to multiple PCs.

Microsoft Windows features a standard "Plug and Play Monitor" driver which uses the display's EDID information to construct a list of supported monitor modes. The Display Resolution control panel applet can be used to disable this driver's Plug and Play features and manually select any resolution or refresh rate supported by the video card.<ref>{{Cite web |url=http://support.microsoft.com/kb/309569 |title=You Cannot Select the Highest Monitor Graphics Modes |access-date=2009-10-12 |archive-date=2011-04-15 |archive-url=https://web.archive.org/web/20110415020409/http://support.microsoft.com/kb/309569 |url-status=dead }}</ref>  Many video card manufacturers and third parties provide control applications which can be used to select a custom display mode that does not conform to the EDID information or the monitor .INF file.