Gentoo Archives: gentoo-user

From: Bill Longman <bill.longman@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] vbox 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot.
Date: Wed, 12 Jan 2011 15:58:00
Message-Id: 4D2DCF30.7010509@gmail.com
In Reply to: Re: [gentoo-user] vbox 64-bit guest will fail to detect a 64-bit CPU and will not be able to boot. by Mark Knecht
1 On 01/12/2011 06:46 AM, Mark Knecht stated:
2 > On Tue, Jan 11, 2011 at 11:04 PM, Valmor de Almeida
3 > <val.gentoo@×××××.com> wrote:
4 >>
5 >> Hello,
6 >>
7 >> I am trying to build a windows 7 guest using virtualbox-ose-3.1.8. When
8 >> starting the virtual machine to install the OS, I get the warning:
9 >>
10 >> "VT-x/AMD-V hardware acceleration has been enabled, but is not
11 >> operational. Your 64-bit guest will fail to detect a 64-bit CPU and will
12 >> not be able to boot.
13 >>
14 >> Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of
15 >> your host computer."
16 >>
17 >> I have enabled the following in the BIOS:
18 >>
19 >> Intel(R) Virtualization Technology
20 >>
21 >> Intel(R) VT-d Feature
22 >>
23 >> I have not created a KVM module in the kernel (using
24 >> gentoo-sources-2.6.34-r12). Is this needed?
25 >>
26 >> Inputs appreciated.
27 >>
28 >> Thanks,
29 >>
30 >> --
31 >> Valmor
32 >
33 > Not sure about the KVM issue.
34 >
35 > I am running an i7-980X Extreme Edition using Gentoo 64-bit, mostly
36 > stable. Kernel is 2.6.36-gentoo-r6, Virtualbox-4.0.0. I run both
37 > 32-bit Win XP and 64-bit Win 7 Professional here with no problems.
38 > Typically I have 3 or 4 VMs running at the same time.
39 >
40 > Others have suggested BIOS. I didn't have to set anything specific there.
41 >
42 > If not BIOS then I'd look at kernel config next.
43
44 I have CONFIG_VIRTUALIZATION turned on (=Y). None of the selections
45 below that are selected in my kernels. They run 64-bit VMs fine, but I
46 don't have VBox > 3.
47
48 Your host kernel should NOT have CONFIG_PARAVIRT_GUEST but your guest
49 kernels should.
50
51 That's the consensus my machines have yielded, both AMD/Intel and 32/64
52 bits, but there are probably other options.