You are right I think I have Kdrive, and I found in the X file(/etc/X11) that the X server is started with exec/opt/kdrive/Xfbdev-screen 480x640 @ 270 "$ @" and with documentation i thought it is possible to change the settings of Xfbde -screen option> Widthxheight [xdepth [xfreq]] [@ rotation]
But:
I don't know if it works?
If so what is the value in xdepth for have grayscale?
Otherwise, how can I change Kdrive to have a standard X11 if It is possible.
PS: Thank you for your answers.