Yeah I get the same thing on boot up and every time it does it it is because I have something USB plugged in other than my keyboard. So for instance if I have my USB BT dongle in during boot it will KP. Or if I have an external HDD during boot it will KP.
Oddly enough though 90% of the time if I have one of those devices connected during boot but do a verbose boot it will work just fine. I haven't looked to see if I have legacy USB on in BIOS and was going to check that when I get home tonight.
The only time my devices in the monitor don't work is when I used to have to unplug the connector and replug in for video to sync. Since I have fixed that issue with EFI injection and setting the resolution using Graphics mode and using the bottom TB port that issue has gone away.
Mark
Ok, I've had some success using Einsteiniac's advice from here:
http://www.tonymacx86.com/mountain-...1216-10-8-how-enable-hd4000-6.html#post407512
(quoted below for reference)
I did UserDSDT, enabled ethernet with the intel, enabled audio 898 and changed the machine to iMac 12,2. Let that install and rebooted. Once rebooted then inject the efi string and set your resolution with graphics mode. Reboot again but make sure your BIOS is set to 32MB for video memory or I have seen it cause graphic glitches or KP's.
From there I have a particular issue with my board KP'ing if I have a USB device plugged in during boot other than my mouse and keyboard that I have not tracked down yet.
Mark
Some things of note:
I did not install Chimera from Multibeast. I ran Multibeast then I ran Chimera 1.11.0.
I went in and switched the video display to 32MB in the BIOS. Initially when I read the thread on HD 4000 I thought it needed to be set at 64MB, but it's actually 32MB.
I've rebooted about 5 times and no kernel panics yet. I haven't tried yet with my Bluetooth adapter or with any other USB devices plugged in (aside from keyboard and mouse) but I'll update this later after a few more reboots.
Airplay does not work for me. I had read that setting the system profile to iMac would allow that but no luck for me.
System sound seems to be working fine except for when I hit the volume up or down keys on the keyboard. By default there is this 'pop' sound that plays but it doesn't play for me.
The computer was unnamed when it booted up, but the icon showed the little iMac shape in the finder.
I tried rebooting with the "Reopen windows when logging back in" option - at the time I only had Safari open but when I logged back in Safari came up but was non-functional. I had to quit and restart the app to get it back again.
I'm attaching my multibeast settings for anyone interested. You can't see it in the shot but I've picked iMac 12,2 for the system definitions.