Hi I know this post is kind of old but I tried all stuff here and still don't manage to make it work...
What I know so far, I need the Firewire PCIe (StarTech) for my audio purposes and it works just fine on windows and just fine on mac, but when it is installed on mac the reboot thingy happens, When Fixshutdown is enabled it reboots right after shutting down but the firewire card is not detected this time, and when its not enabled the computer shuts down but when I move the mouse or enter something via USB it boots and firewire is not there either I'd need to powerbutton shutdown then it would work again...
Also with some options I get problems when restarting, the firewire not getting recognized or just black screen not posting even the BIOS, I need to force shutdown with powerbutton again… and If I remove the firewire B*tch all goes back to normal… I'm starting to think the best option would be to get rid of the goddamned firewire… but there's gotta be a solution… this other option would mean to lose money.
So my question is what can I do to fix this, to have a proper shutdown and then everything booting back up again being all detected and cool?
PS: My rig is ASROCK Z97 Extreme 3 with an i7 4790K, and i run Intel HD4600 and the GTX1070 for pc and waiting for proper drivers to be released.
One more thing the DSDT stuff I don't understand how it works, if somebody could explain how to make this DSDT thing to work, theoretically I don't need any DSDT file with this motherboard to be compatible so i never worried much about it…
I had the same with Firewire PCI card.
I changed SMBIOS and it was gone. Also check your BIOS setting. I also remember settings with USB settings in BIOS to fix these issues.
In my case none of the Clover edits of DSDT worked. All my systems run without DSDT.