Hi, I am having trouble with Ubuntu 12.04 and Virtualbox - AMD VT-X support for 64bit guest OS in particular. I have existing VMs from a previous install and I cannot use them, I am also unable to create new x64 VMs. Virtualbox says:
I had 64bit guest support on 12.04 before, but since then I have reinstalled the system. I had been using 3.2.0-29-generic until yesterday. No hardware has been changed and no BIOS settings have been altered.
I first tried Virtualbox from repo and I am currently using Virtualbox 4.1.22 closed-source(extensions installed).
As far as I'm aware, "lm" and "vmx" flags are important here - they indicate that the Cpu is capable of virtualisation. They don't tell us, however, whether or not the capabilities are enabled, either in BIOS or by Linux Kernel.
Am I wrong in thinking that these are the cpu capabilities enabled and working on my linux system? vmx is present here, no lm.
If I understand this correctly, a return value of 3 or 5 here indicates that VT-X is enabled and working. My system returns 1.
Are there some packages or utilities I am missing which prevents this from working? I built the linux system myself from a mini.iso and everything else seems to be working fine.
Thanks for any help or advice in advance
ps, wasn't sure where to put this.
Quote:
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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 first tried Virtualbox from repo and I am currently using Virtualbox 4.1.22 closed-source(extensions installed).
Code:
# uname -sri
Linux 3.2.0-30-generic x86_64Code:
# cat /proc/cpuinfo | grep flags
flags : 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
nopl aperfmperf pni dtes64 monitor ds_cpl vmx est
tm2 ssse3 cx16 xtpr pdcm lahf_lm dtherm tpr_shadow vnmi flexpriorityCode:
# lshw -c cpu | grep capabilities
capabilities: fpu fpu_exception wp 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 x86-64
constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf
pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm
lahf_lm dtherm tpr_shadow vnmi flexpriority cpufreqQuote:
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nx lm constant_tsc nx x86-64 constant_tsc |
Code:
# apt-get install msr-tools
# modprobe msr
# rdmsr 0x3AAre there some packages or utilities I am missing which prevents this from working? I built the linux system myself from a mini.iso and everything else seems to be working fine.
Thanks for any help or advice in advance
ps, wasn't sure where to put this.