This is especially true for 64-bit Windows VMs. On any host, you should enable the I/O APIC for virtual machines that you intend to use in 64-bit mode. On 64-bit hosts (which typically come with hardware virtualization support), 64-bit guest operating systems are always supported regardless of settings, so you can simply install a 64-bit operating system in the guest. Since supporting 64 bits on 32-bit hosts incurs additional overhead, VirtualBox only enables this support upon explicit request. If you want to use 64-bit guest support on a 32-bit host operating system, you must also select a 64-bit operating system for the particular VM. You must enable hardware virtualization for the particular VM for which you want 64-bit support software virtualization is not supported for 64-bit VMs. You need a 64-bit processor with hardware virtualization support (see Section 10.3, “Hardware vs. VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met: I am trying to create the VBox to store the files from my win7 install. I also verified this was a 64-bit machine before I nuked win7 as primary OS. It is my understanding that the 'lm' flag denotes a 64-bit processor. I have verified the processor using $cat /proc/cpuinfo. I am unable to create a 64-bit virtual machine in Oracle VirtualBox. I was told the 'lm' preceding the 'constant_tsc' flag denotes 64-bit processor. Model name : Pentium(R) Dual-Core CPU T4400 2.20GHzįlags : 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 est tm2 ssse3 cx16 xtpr pdcm xsave lahf_lm dthermĪddress sizes : 36 bits physical, 48 bits virtualĪnd for the record, I am not familiar with all the fields returned by that command. Here are the results from running $cat /proc/cpuinfo: I belive the machine with the issue meets specs to run VBox. I am using the same Linux distro and VBox version on my other laptop without issue. When i first start the process of creating virtual box, I am unable to select a 64-bit version of anything. I have Pentium(R) Dual-Core CPU T4400 2.20GHz × 2 with 2.8GiB usable RAM. In addition, for 64-bit Windows guests, you should make sure that the VM uses the Intel networking device, since there is no 64-bit driver support for the AMD PCNet card see Section 6.1, “Virtual networking hardware”.I installed from Software Center. You must enable hardware virtualization for the particular VM for which you want 64-bit support software virtualization is not supported for 64-bit VMs.ģ. You need a 64-bit processor with hardware virtualization support (see Section 10.3, “Hardware vs. VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met:ġ.
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