Graeme Gill schrieb: > 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. When I tried to add some debugging stuff and recompile, I got the following error: pablo@svalbart:~/src/argyll-0.60-jam/spectro$ jam -f ../Jambase ...found 247 target(s)... ...updating 3 target(s)... Link dispcal /usr/lib/libX11.a(CrGlCur.o): In function `open_library': undefined reference to `dlopen' /usr/lib/libX11.a(CrGlCur.o): In function `fetch_symbol': undefined reference to `dlsym' /usr/lib/libX11.a(CrGlCur.o): In function `fetch_symbol': undefined reference to `dlsym' collect2: ld gab 1 als Ende-Status zurück After adding -ldl to the Jamfile, I could compile it. I don't know why linking it before? The only thing I have changed since the last compilation is to install the fglrx_gamma extension.. Strange.. Anyway, now it works. (And I don't know why it didn't before...) ciao Pablo