Pablo d'Angelo wrote:
What does "dispcal -?" do ?
Diagnostic: Usage requested usage: dispcal [options] outfile -v Verbose mode -display displayname Choose X11 display name -d n Choose the display from the following list (default 1) ** No displays found **
You'd need to debug the routine spectro/dispwin.c/get_displays(), to see if XOpenDisplay() failed, XineramaQueryScreens() returned 0 screens, or ScreenCount() returned zero screens, or to identify what else failed, and why.
Graeme Gill.