xvidtune is a client interface to the X server video mode extension (XFree86-VidModeExtension). All questions regarding this software should be directed at the Xorg mailing list: https://lists.x.org/mailman/listinfo/xorg The master development code repository can be found at: https://gitlab.freedesktop.org/xorg/app/xvidtune Please submit bug reports and requests to merge patches there. For patch submission instructions, see: https://www.x.org/wiki/Development/Documentation/SubmittingPatches