Intel VT-x not recognised by unraid on i7-4790 CPU

Hi,

I recently upgraded my version of unraid from v6.0-beta14 to 6.1.0.  I was previously using xen to run a couple of virtual machines.  Since upgrading, obviously my xen VM's are no longer available so I went to install KVM.  However, for some reason unraid doesn't seem to detect the capabilities of my CPU which according to this page http://ark.intel.com/products/80806/Intel-Core-i7-4790-Processor-8M-Cache-up-to-4_00-GHz should support this feature. 

cat /proc/cpuinfo

processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 60
model name      : Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
stepping        : 3
microcode       : 0x17
cpu MHz         : 3600.112
cache size      : 8192 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm ida arat pln pts dtherm fsgsbase bmi1 hle avx2 bmi2 erms rtm xsaveopt
bugs            :
bogomips        : 7200.22
clflush size    : 64
cache_alignment : 64
address sizes   : 39 bits physical, 48 bits virtual
power management:

processor       : 1
vendor_id       : GenuineIntel
cpu family      : 6
model           : 60
model name      : Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz
stepping        : 3
microcode       : 0x17
cpu MHz         : 3600.112
cache size      : 8192 KB
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1
apicid          : 1
initial apicid  : 1
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm ida arat pln pts dtherm fsgsbase bmi1 hle avx2 bmi2 erms rtm xsaveopt
bugs            :
bogomips        : 7200.22
clflush size    : 64
cache_alignment : 64
address sizes   : 39 bits physical, 48 bits virtual
power management:

XEN isn't supported at all in any finalized version of unRAID.

Are you sure you have vt-d enabled in BIOS?

That's probably it... I'll have a look..

That's probably it... I'll have a look..

What did you find?  Just curious if this is still an issue.

Edit:  if I don't hear from you soon, I or another will move this to General Support.  We can always move it back if needed.

I'm going to wager that this simply wasn't enabled in his BIOS.  Probably had linux-only guests when he was using Xen, which doesn't require any hardware-based virtualization to work.  KVM requires it for ALL guests.

Agree ... that's about the only reason it wouldn't work.

I recently upgraded from 6.0 to 6.1.9 and am having this same issue, but I'm not home to check the bios at the moment. Previously I had  a Win vm setup under zen not to mention the fact that my hardware clearly supports vt-x. Any other things I could try if it's not the bios issue?

It wasn't bios for me. I still had a setting for starting unraid with zen set. Once I started normally, KVM was enabled in unraid.