hi, apt-file search xf86vmode.h gave me : xlibs-static-dev: usr/X11R6/include/X11/extensions/xf86vmode.h when i tried dpkg -L xlibs-static-dev, i couldn't find xf86vmode inside. my system : ii xlibs-static-dev 6.8.2.dfsg.1-4 where is xf86vmode.h ? cheers Fathi