ForceRotation
If you need the way to force some rotation of your N900 screen, this is for you.
/* gcc rotate.c -lX11 -lXrandr */ #include <X11/Xlib.h> #include <X11/extensions/Xrandr.h> static void set_rotation (Rotation r_to) { Rotation r; int screen = -1; XRRScreenConfiguration* config; int current_size=0; Display* display; Window rootWindow; display = XOpenDisplay(":0"); if (display == NULL) { return; } screen = DefaultScreen(display); rootWindow = RootWindow(display, screen); XRRRotations(display, screen, &r); config = XRRGetScreenInfo(display, rootWindow); current_size = XRRConfigCurrentConfiguration (config, &r); XRRSetScreenConfig(display, config, rootWindow, current_size, r_to, CurrentTime); } int main (int argc, char *argv[]) { set_rotation(RR_Rotate_90); //set_rotation(RR_Rotate_270); //set_rotation(RR_Rotate_180); //set_rotation(RR_Rotate_0); }