Program stops working after driver change.

I use Arch Linux and recently switched from nouveau to the Nvidia provided drivers.
After that, the following function, which I called from the main draw function(which is provided to glutDisplayFunc), stopped working… It compiles, but nothing appears on screen.


void draw_axes_2d(int width,int height, int grad = 10)
{
	glBegin(GL_LINE); // Drawing the axes
		glVertex2f(-width/2,0);
		glVertex2f(width/2,0);
		glVertex2f(0,-height/2);
		glVertex2f(0,height/2);
	glEnd();
	glPointSize(2.0);
	glBegin(GL_POINT); // Graduations
		int c=0;
		for(c = 0;c<width/2;c+=grad)
			glVertex2i(c,0);
		for(c = 0;c>-width/2;c-=grad)
			glVertex2i(c,0);
		for(c = 0;c<height/2;c+=grad)
			glVertex2i(0,c);
		for(c = 0;c>-height/2;c-=grad)
			glVertex2i(0,c);
	glEnd();
	glPointSize(1);
}

It is not a problem with coordinate settings, because I can call the following function, and see a circle drawn.


void draw_circle(GLfloat c_x,GLfloat c_y, GLfloat radius, GLfloat degree_gradient=1.0)
{
	float pi = 3.14159;
	float rg = degree_gradient*pi/180;

	glBegin(GL_LINE_LOOP);
		for(float f = 0;f<2*pi;f+=rg)
			glVertex2f(radius*cos(f)+c_x,radius*sin(f)+c_y);

	glEnd();
	glBegin(GL_POINT);
		glVertex2i(c_x,c_y);
	glEnd();
	glFlush();
}


	glBegin(GL_LINE); // Drawing the axes

That should be GL_LINES (and later GL_POINTS).