Tag Archives: 64-bit

ubuntu xubuntu 14.04.02 64-bit @oracle @virtualbox 5.0.8 64-bit on @intel T2390 only allows 32-bit vms ! why ?

ubuntu xubuntu 14.04.02 64bit @oracle @virtualbox 5.0.8 64bit on @intel T2390 only allows me to create 32bit vms ! why ?

$ uname -a 

Linux xubu14 3.16.0-51-generic #69~14.04.1-Ubuntu SMP Wed Oct 7 15:32:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -a 

No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 14.04.3 LTS
Release:    14.04
Codename:    trusty

$ cat /proc/cpuinfo 

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Pentium(R) Dual CPU T2390 @ 1.86GHz
stepping : 13
microcode : 0xa3
cpu MHz : 800.000
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm
bogomips : 3724.23
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual

VMware and Intel 64bit hosts & guests

VMware Workstation, Player, and Server require a 64-bit CPU to run a 64-bit guest operating system.

Intel CPUs must have EM64T and VT support in the chip and in the BIOS. Intel EM64T CPUs do not have segmentation support in long mode. If the Intel EM64T CPU is VT-capable, it comes with hardware virtualization support (Intel’s Virtualization Technology). This hardware virtualization support allows VMware to work around the lack of segmentation, making it possible to run 64-bit guest operating systems on Intel EM64T VT-capable CPUs.

If the Intel site says that your CPU(s) support VT, but your VMware product says that your host does not support VT, you may have encountered an Intel chip erratum (possibly AW67, AV69, AX64, AY64, AZ69 or AAA70, depending on the CPU). The effect of this erratum is that some CPU features are reported incorrectly by the CPU. The only solution to this problem is to obtain an updated BIOS from your system vendor.

See