I've been sick for the past week with norovirus, and only working on and off on the Quadro 4000 HDMI audio when I feel well enough. Thanks for directing me to the kext editing document. My kext was edited with the same tool & procedures with only minor differences from what was in the doc (I used kextbeast and installed from the desktop instead of dragging to S/L/E, I didn't color the kexts, and I used copy-and-past to move the kext to the desktop prior to editing instead of drag-and-drop- the only other thing I did was when the edits were made the original binaries were re-named with a "~" prefixing the name, and on one of the edits, never removed that from inside the kext, which I didn't think would make any difference). I know that it only takes one small mistake to render the edited kext a failure so I will follow the guide to the letter next time I feel well enough to work on it. Still, I am surprised that my technique was incorrect- the first thing I did before I rebooted after editing and installing the kext was to go into S/L/E and make certain the edited kext was installed there and that the edits were correct, and the first time I did after I the kernal panic was to install the kext that had been working before the edits so I could boot into that drive, and then re-edit the edited kext that was still on my desktop to undo the edits that were return it to it's original state and installed it with kextbeast- on reboot, the twice edited kext worked again like it had before I did any edits. I'll let you know what happens after I use the guide you recommended to do the edits.
