Ticket #4364 (closed defect: wontfix)

Opened 9 years ago

Last modified 9 years ago

unable to start/install guest CentOS 5.2 64Bit on 64Bit CPU Host system (linux 2.6.29 Debian AMD64)

Reported by: nadavkav Owned by:
Priority: major Component: other
Version: VirtualBox 3.0.0 Keywords: 64bit AMD64 Host CentOS
Cc: Guest type: Linux
Host type: Linux


i have a Debian 5.0 AMD64 host system with a 64Bit CPU when i try to run/install/start a new VM and boot from an install DVD of CentOS 5.2 64Bit i get the following error: "your cpu does not support long mode"


CentOS 5.2-2009-07-02-22-22-14.log Download (44.2 KB) - added by nadavkav 9 years ago.
tring to boot from an install CentOS 5.2 64Bit CD

Change History

comment:1 Changed 9 years ago by frank

Please attach your VBox.log file. Most probably your CPU does either not support VT-x or AMD-V or this feature was not properly enabled by your BIOS. Note that we support 64-bit guests only with VT-x/AMD-V enabled hosts (this is mentioned in the user manual).

comment:2 Changed 9 years ago by nadavkav

i have "Intel(R) Core(TM)2 Duo CPU P7350 @ 2.00GHz"

laptop:~# hwinfo --cpu 01: None 00.0: 10103 CPU

[Created at cpu.304] Unique ID: rdCR.j8NaKXDZtZ6 Hardware Class: cpu Arch: X86-64 Vendor: "GenuineIntel" Model: 6.23.6 "Intel(R) Core(TM)2 Duo CPU P7350 @ 2.00GHz" Features: 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,pni,dtes64,monitor,ds_cpl,est,tm2,ssse3,cx16,xtpr,pdcm,sse4_1,lahf_lm Clock: 800 MHz BogoMips: 3988.28 Cache: 3072 kb Units/Processor: 2 Config Status: cfg=new, avail=yes, need=no, active=unknown

and i am attaching the VBox.log file too

Changed 9 years ago by nadavkav

tring to boot from an install CentOS 5.2 64Bit CD

comment:3 Changed 9 years ago by frank

  • Status changed from new to closed
  • Resolution set to wontfix

Unfortunately your processor does not support VT-x, see  Intel's processor finder. So you will not be able to run 64-bit guest OSses with VirtualBox. Sorry.

comment:4 Changed 9 years ago by nadavkav

thank you for the info.

will you ever support this kind of feature ?

i wonder how easy (if at all) is to change CPU in my HP DV7 laptop ?

comment:5 Changed 9 years ago by frank

I fear not. The reason is that the number of CPUs without VT-x or AMD-V is constantly decreasing, most new PCs have support for virtualization built-in. Adding a non VT-x/AMD-V mode for 64-bit guests would be a big effort we don't want to pay.

comment:6 Changed 9 years ago by nadavkav

thank you :-)

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