Get manufacturer's driver Intel (Driver Unknown)

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http://askubuntu.com – I have a Dell Latitude D505 with a "Intel® 855GME integrated UMA graphics chipset" and Ubuntu reports that the Graphics card and driver are unknown. I ran the commands on this page: How to install Intel 82852/855GM driver? But nothing has changed. I have had problems mainly with Blender (3D modeling program, if you didn't know) crashing when going into edit mode or creating complex objects like cylinders or UV spheres. I also have several Humble games that worked before I installed Ubuntu which now fail when creating vertex buffers etc. What do I need to do to get my graphics card working a (HowTos)