[PyOpenGL-Users] processor specific result

[FvW <vw...@vu...>]

Hello,

I have a python program that draws a map using OpenGL.
On my old card, ASUS V7700pro (GeForce2 GTS), the result was good.
I replaced this card with a ASUS V9520 (GeForce FX5200) because the fan
was worn. This card does not display as expected. 

All area are drawn using GL_POLYGON. I can see the edges of the
triangles as slightly darker lines. If the trangles are very small, that
area looks darker than normal.

Can anyone tell me what the cause can be, and how to fix it?
Python 2.3, pyopengl 2.0.1.08-5.1, nvidia 7174 drivers
Debian 3.1(Sarge).

Thanks,
Fulko

Some code that might be of interest.
The vertices of the different trianges are shared (identical).

glClearColor(0,0,0,0)
glClear (GL_COLOR_BUFFER_BIT |GL_DEPTH_BUFFER_BIT )
glShadeModel(GL_SMOOTH)

    glLineWidth(1.0)
    glColor3d(0.7,0.7,0.7)
    for a in range(area):
       v1,v2,v3=a
       glBegin(GL_POLYGON)
       glVertex2f(v1)
       glVertex2f(v2)
       glVertex2f(v3)
       glEnd()