Failed to set mode

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        When I run the demo program 'pageflip' of libggi, the following error message 
shows up:

display-fbdev: FBIOPUT_VSCREENINFO: Invalid argument
LibGGI: Failed to set mode: F2.[]
Cannot set mode!

        How to solve this problem?

        ps. I use libgii-0.6 and libggi-2.0b2.1.