Ticket #10514 (closed defect: worksforme)
64-bit Ubuntu guest won't start - hardware acceleration "not operational"
|Reported by:||andrex||Owned by:|
Host is 64-bit Ubuntu Maverick, guest is 64-bit Ubuntu Precise. The guest won't start, coming up with the dreaded error dialog:
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.
AMD-V is available in the CPU:
$ grep -c ' svm ' /proc/cpuinfo 3
and I've checked that it's enabled in the BIOS. Motherboard is a Gigabyte GA-MA790XT-UD4P, CPU is AMD Phenom II X3 720.
I'm attaching VBox.log. Note the following excerpts:
00:00:00.846 Mnemonic - Description = guest (host) 00:00:00.846 SVM - AMD VM Extensions = 0 (1)
This seems to show that SVM is available in the host, but not the guest.
Virtualbox seems to claim that the error is because SVM is already in use:
00:00:00.962 HWACCM: No VT-x or AMD-V CPU extension found. Reason VERR_SVM_IN_USE
But AFAICT that's not the case. No KVM is installed, and lsmod confirms that none is loaded. I don't see any virtualization modules loaded apart from vboxdrv, vboxnet, etc.