vga output disconnected

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http://ubuntuforums.org – Hello. Yesterday, my joybee gp2 projector was easily detected in the display setting. But today, no automatic detection happened. I installed the intel linux graphics drivers.when i was using windows, i have switchable graphics from intel to ati. According to my graphics here in ubuntu, i ahve intel ironlake mobile x86. does graphics have anything to do with the VGA1 output not connected in xrandr.I have read documentations and followed steps using the xrandr --output VGA1 --right -of LVDS1 but nothing happened. I want the unit to be plug n play...please help me. (Hardware)