VT-X always off on Mac Pro, even after sleeping

I have build 1908 installed on a Mac Pro with the latest firmware, the first build that I've tried to actually use, and it complains every time I start the VM that VT-X is off and I need to sleep my Mac.

So, I put the Mac to sleep, wake it up, and try again, and I get the same error.

Could it be that the ATTO UL5D SCSI PCIe card is preventing my Mac from going into a deep enough sleep to workaround this firmware issue?

Thanks,
-Mike

 

Same thing with build 1910.

 

I haven´t any PCIe in my macpro and my problem is the same.
VT-x is always off in all builds, include 1910.
I probed all.
I don´t know to do.

Please, help!.

 

Make sure you are REALLY putting the Mac to sleep. Go to Apple Menu > Sleep. Let the Mac go to sleep for 10 seconds. Make sure you hear the hard drive spin down and there is nothing on the screen. THEN wake your Mac up.

I found that I wasn't waiting long enough. The screen would go blank and I thought that was sleeping. It turns out that I wasn't waiting long enough for the processors to "sleep." Hope this helps.

 

I tried again and waited a full 30 seconds after the drives spun down and the monitors went blank - still the same problem.

-Mike