VoodooHDA 有時會同nvidia 等display card 的hdmi audio out 撞左
VoodooHDA 會以為display card 個張先係main audio card
以下方法可以解決問題
[1]先確定graphic card 安裝成功，無有問題
到system report.. Hardware>graphics/Displays check 一下graphic card 的vendeor id and device id
先到 /system/library/extensions 找VoodooHDA.kext
右click show package content 入到去folder 改以下 file ./contents/Info.plist
找
<key>IOMatchCategory</key> <string>VoodooHDADevice</string>
在這code 下加入vendeor id and device id for skipping
<key>VoodooHDAVidSkip</key> <string>0x10de</string> <key>VoodooHDADivSkip</key> <string>0x1244</string>
之後clear caches
sudo -i cd /system/library/Caches rm -r com.apple.kext.caches
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