Ticket #3948 (closed defect: wontfix)

Opened 14 years ago

Last modified 13 years ago

No 64-bit guests with T5550 => No VT-x

Reported by: Tigerboy Owned by:
Component: installer Version: VirtualBox 2.2.2
Keywords: Cc:
Guest type: Linux Host type: Windows


Cannot install a Ubuntu 9.04 64 bit guest. VT-x is checked but it's also grayed out so I can't uncheck it. In the list of the machine it says VT-x is enabled I put about a gig of ram for the guest and 62 preconfigured gigs for the drive 128 meg for the video card and 3d enabled. I try to install ubuntu 64 via an iso it gets to the screen to select the language and then I go to select install option and it comes back saying I don't have a 64 bit cpu just a 686 cpu is found.

My system is a gateway P-6860fx with a pentium dual core T5550 and 4 gigs of ram with a 250 gig sata drive. I have the latest bios for it. Vista 64 bit works just fine. I bought this one because you can easily upgrade the CPU and add a second harddrive which is unusual for a laptop. It also has the fastest 8800 nvidia card.


Logs.rar Download (34.9 KB) - added by Tigerboy 14 years ago.
for logs numbered in order of occurance.

Change History

comment:1 Changed 14 years ago by sandervl73

Without a VBox.log of such a session there is nothing we can do. My guess is that your BIOS is broken or somebody else is using VT-x on your system.

comment:2 Changed 14 years ago by frank

  • Status changed from new to closed
  • Resolution set to wontfix
  • Summary changed from Vista 64bit P-6860fx with a intel duo 64 bit T5550 cpu in vbox VTx is greyed but it says it is enabled in the list I try to install Ubuntu 64 says my cpu is not 64bit and only finds a 686 cpu to No 64-bit guests with T5550 => No VT-x

 This website does not mention any VT-x support of your CPU, only Dual Core and EM64T are mentioned. Seems you have the rare case of a CPU supporting 64-bit but not having VT-x available. Sorry, even on a 64-bit host VirtualBox will not be able to execute 64-bit guests on your CPU.

comment:3 Changed 14 years ago by Tigerboy

  • Status changed from closed to reopened
  • Resolution wontfix deleted

Ok I have subsequently install ubuntu x86 successfully is there anyway for me to retrieve any useful log after having done this? Can I just start up a new machine and then go about installing? I am the only user on my laptop and it seems to be a clean system regarding viruses etc. VTx appears to be enabled as it says so in virtualbox's list but I cannot uncheck VTX nor can I add the paging option just below it. Please tell me if i create a new machine for purposes of generating a log how can I find it's log file for submission to you.


Changed 14 years ago by Tigerboy

for logs numbered in order of occurance.

comment:4 Changed 14 years ago by Tigerboy

There you are all four log files generated thus far. Enclosed in logs.rar.

comment:5 Changed 14 years ago by Tigerboy

here is a list of intel cpus of the core 2 duo processor (two cores) you will notice that T5550 does not have "intel Virtualization Technology(Intel VT) but it has all other checks dual core speedstep 64bit etc. This list might be helpful. I can upgrade the cpu on this notebook easily to one with the Virtualization. I believe depending on the design of the notebook others may be able to upgrade also. Strangely when I researched this Intel printed materials stated that it supported virtualization. SO the fault is with the particular cpu if you go up even just to a T5560 VT is a feature.

comment:6 Changed 14 years ago by Tigerboy

correction the T5600 and above.

comment:8 Changed 14 years ago by Tigerboy

I know this is a bug report but people do use them to figure solutions. I just wanted to add a final note. as for my computer the gateway p-6860fx it seems the best overall cost/benefit upgrade is not the Txxx but upgrade the CPU to the X7800 .. this cpu the P6860fx bios can run at full tilt and it's faster and better overall than the T8300 the only possible thing is I don't think it has SSE4 instructions but it has all the other bells and whistles including full support for very fast visualization. Make sure you fetch a new tube of artic silver before you go for it. This would probably neutralize the warranty.

comment:9 Changed 14 years ago by frank

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

I would suggest you to go to the  forums to debate such things.

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