This guide assumes the "usual stuff" about GFX support is already OK (right kexts with right dev IDs, injecter correctly set...)
Check the relevant topics if you're not sure.


Many people with nVidia lost QE/CI after the 10.5.3 update.
The way to bring it back is very simple :

- Open the info.plist of the injecter (/system/library/extensions/xxxx.kext/contents/info.plist)

- Find the line with :
QUOTE
<key>IOProbeScore</key>
<integer>XXXX</integer>

- Replace that number with 0

- Save to desktop, move the file back over the original one, overwrite (you'll need to authenticate)

- Launch the terminal and type those 3 lines to repair permissions :
QUOTE
sudo chown -R root:wheel /system/library/extensions
sudo chmod -R 755 /system/library/extensions
sudo rm /system/library/extensions.mkext

You can now exit and reboot, QE/CI will be back