On 01/12/2011 06:46 AM, Mark Knecht stated: > On Tue, Jan 11, 2011 at 11:04 PM, Valmor de Almeida > <val.gen...@gmail.com> wrote: >> >> Hello, >> >> I am trying to build a windows 7 guest using virtualbox-ose-3.1.8. When >> starting the virtual machine to install the OS, I get the warning: >> >> "VT-x/AMD-V hardware acceleration has been enabled, but is not >> operational. Your 64-bit guest will fail to detect a 64-bit CPU and will >> not be able to boot. >> >> Please ensure that you have enabled VT-x/AMD-V properly in the BIOS of >> your host computer." >> >> I have enabled the following in the BIOS: >> >> Intel(R) Virtualization Technology >> >> Intel(R) VT-d Feature >> >> I have not created a KVM module in the kernel (using >> gentoo-sources-2.6.34-r12). Is this needed? >> >> Inputs appreciated. >> >> Thanks, >> >> -- >> Valmor > > Not sure about the KVM issue. > > I am running an i7-980X Extreme Edition using Gentoo 64-bit, mostly > stable. Kernel is 2.6.36-gentoo-r6, Virtualbox-4.0.0. I run both > 32-bit Win XP and 64-bit Win 7 Professional here with no problems. > Typically I have 3 or 4 VMs running at the same time. > > Others have suggested BIOS. I didn't have to set anything specific there. > > If not BIOS then I'd look at kernel config next.
I have CONFIG_VIRTUALIZATION turned on (=Y). None of the selections below that are selected in my kernels. They run 64-bit VMs fine, but I don't have VBox > 3. Your host kernel should NOT have CONFIG_PARAVIRT_GUEST but your guest kernels should. That's the consensus my machines have yielded, both AMD/Intel and 32/64 bits, but there are probably other options.
