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Hyper-V conflicts with VB
Posted: 24. Nov 2013, 06:48
by ssawgift
I instaslled Hyper-V on Windows 8.1 and I cannot start any guests. The error says:
VT-x is not available (VERR_VMX_NO_VMX).
Is this a known problem?
Re: Hyper-V conflicts with VB
Posted: 24. Nov 2013, 15:05
by mpack
You can't run two VM applications at the same time if both want to use VT-x.
Re: Hyper-V conflicts with VB
Posted: 26. Nov 2013, 05:27
by ssawgift
It's interesting that I can run VMware Player and VB at the same time.
Re: Hyper-V conflicts with VB
Posted: 26. Nov 2013, 11:21
by michaln
ssawgift wrote:It's interesting that I can run VMware Player and VB at the same time.
Yes... because VMware and VirtualBox do not use VT-x
at the same time but rather take turns. On the other hand, Hyper-V permanently takes over VT-x and doesn't let anyone else use it.
Re: Hyper-V conflicts with VB
Posted: 27. Nov 2013, 05:44
by ssawgift
Are there possibly *any* workarounds? I really want to have three of them in harmony.
Re: Hyper-V conflicts with VB
Posted: 27. Nov 2013, 06:02
by BillG
Not really. If Hyper-V is installed, the hypervisor will automatically load at boot time and grab Vt-x. The only way to prevent this is to change the hypervisorlaunchtype setting in the loader to prevent it loading (and then the Hyper-V hypervisor is not running, so you can't use Hyper-V).
Re: Hyper-V conflicts with VB
Posted: 27. Nov 2013, 07:33
by ssawgift
It's disgusting...
But thanks for the information on hypervisorlaunchtype setting.
Re: Hyper-V conflicts with VB
Posted: 27. Nov 2013, 13:08
by michaln
ssawgift wrote:Are there possibly *any* workarounds? I really want to have three of them in harmony.
That's something you have to take up with Microsoft...