virtualbox.org

Hi.

VT is grayed out and cannot be touched.

Facts:

- My processor supports VT/XD.
- It's enabled in the bios, along with Execute Disable Bit.
- Already tried disabling and enabling it again.
- Hyper-V VMs are running on this system (Hyper-V doesn't allow VMs to be started if it cannot detect VT enabled so it's a Virtualbox problem).
- I could live without VT on Virtualbox if VM performance wasn't so horribly bad (may not be VT related).
- I want to virtualize my usual desktop, that's the reason i can't do it with Hyper-V like the rest of VMs on this system (Hyper-V doesn't support USB, audio, D3D or widescreen resolutions. The workaround is using RDP, with the obvious performance loss).
- Host constantly BSODs when starting up VMs in Virtualbox. Event viewer throws this:
Specs:

Proc: Intel Q9300
Mobo: Intel DP45SG
Ram: 8 GB DDR3 1333 Mhz
Host: Windows Server 2008 Enterprise x64

Thanks

Hi,

- Hyper-V VMs are running on this system ...

do you try running both hypervisors, Hyper-V and Virtualbox the same time? - that wont work

I thought it could be an incompatibility with Hyper-V.

So i would basically need to migrate my Hyper-V vhds back to Virtualbox and remove the hyper-v role for virtualbox to work?

remove the hyper-v role

maybe its sufficient to stop/deactivate the service (if there is any, i dont know Hyper-V)