Boot to Clover GUI, navigate to Options
Select Binary Patching->Custom Kexts Patching
Uncheck IOGraphicsFamily....
Return to main screen and then boot
Once logon, mount EFI partition. Open Config.plist with Clover Configurator 4.40
Under Kernel and Kext Patches/KextToPatch, you should see the patch I mentioned. Change the values to the above.