x11proto-xf86vidmode-dev 2.3.1-2 (arm64 binary) in ubuntu trusty

 This package provides development headers describing the wire protocol
 for the XFree86-VidMode extension, which provides access to detailed
 timings of video modes currently in use, and a means to modify them.
 .
 More information about X.Org can be found at:
 <URL:http://www.X.org>
 .
 This package is built from the X.org xf86vidmodeproto proto module.