libxxf86vm-dev 1:1.1.4-1 (amd64 binary) in ubuntu yakkety

 libXxf86vm provides an interface to the XFree86-VidModeExtension
 extension, which allows client applications to get and set video mode
 timings in extensive detail. It is used by the xvidtune program in
 particular.
 .
 This package contains the development headers for the library found in
 libxxf86vm1. Non-developers likely have little use for this package.
 .
 More information about X.Org can be found at:
 <URL:http://www.X.org>
 .
 This module can be found at
 git://anongit.freedesktop.org/git/xorg/lib/libXxf86vm