xf86MapVidMem: Could not mmap /dev/vga (Invalid argument). What is this?

[Максим Голунов]

 Please, help. I know that configurated X11. My videoCard is GeForce 8600.
 But I can`t starting X. File-log attach to this letter. I`m undestending than
 problem in phrase
 
 xf86MapVidMem: Could not mmap /dev/vga (Invalid argument) 
 
 but I don`t know this is mean.
 What I need do?  I have enough deep knowledge in FreeBSD.
 
 Thank you very much.

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