犯2了，開機報出一堆提示，以爲出大事了，如下
attention: unsupported video configuration detected
action is required
this computer has an add_in graphics card, but the monitor cable is pluyyed
into the integrated video connrcctor.
to attach the monitor cable to the abb_in graphics card :
1 shut down the computer
2 plug themonitor cable into the add-in graphics card
connector,
this mag require a video adapter or video adapter cable,(provided with the system)
3 tutn on the computer.
this message should not appear after completing these steps.
for more information or help,please refer to the system documentation
原來是顯示器電纜差錯口了。是這樣的，我Dell主機上有個集成顯卡口和獨立顯卡口，如果將將接頭插在集成顯卡口上就會報如上錯誤。