In order to get the original AppleHDA back and maybe ditch some of the potential carry-over issues from my Yosemite install I tried doing a clean El Cap install using the installer located on Drive1 (Yosemite) to Drive2 (wiped in prep for El Cap). It seems to install ok, but will not boot past the grey screen after the install with nothing added to EFI. I tried GraphicsEnabler=No, ncpi=0x2000, -v, -x, kext-dev-mode=1, nv_disable=1, but no luck there either.
Then I tried installing Clover to the EFI with my kexts moved to 10.11 folder and SIP disabled in the updated config.plist, I get Apple logo & a super slow loading bar but eventually when the bar is full, nothing happens.
It appears to be hanging at either:
IOCTL not recognized: 234 out of 235
or next line
**** [IOBluetoothFamily][SearchForTransportEventTimeOutHandler] -- Missing Bluetooth Controller Transport!
Before it was adding a line about Kexts needing a rebuild, it doesn't seem to be doing that anymore.
I also tried using the new Post El Cap Clover installers from TonyMac's downloads, and using a config.plist from another user on TM with this board, no luck there either
Happy to try anything at this stage, have the clean El Cap ready to go and can wipe the EFI and start over if need be?