raspberry hdmi output

source:http://shumeipai.nxez.com/2013/08/31/hdmi-vga-converter-black-screen-troubleshooting-program.html

hdmi_force_hotplug=1

config_hdmi_boost=4

hdmi_group=2

hdmi_mode=9

hdmi_drive=2

hdmi_ignore_edid=0xa5000080

disable_overscan=1

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hdmi_mode=4    640x480   60Hz

hdmi_mode=9    800x600   60Hz

hdmi_mode=16   1024x768  60Hz

hdmi_mode=17   1024x768  70Hz

hdmi_mode=23   1280x768  60Hz