Can't run games on host machine while Hyper-V is running


  1. Posts : 3
    W10
       #1

    Can't run games on host machine while Hyper-V is running


    Hi

    So, I just made a W10 VM with Hyper-V and it's running fine (I only assigned it 1 core and 1.5GB of memory). The VM is running a background process that consumes nothing, it's basically idling.

    Now I go back to the host machine and I can't start any game. None. They all crash/freeze with a black screen as soon as I open the exe. Ofc they all ran fine before. I closed the "screen" window of the VM, I only have the Hyper-V Manager with the VM in the background. WTF? I don't get it. I assume Hyper-V is taking up the GPU or something? Only games don't work, other programs are fine. Yet GPU usage in the task manager is 0%. CPU usage 5-10% and memory 52% (I have 8GB, all the games I'm trying to run are old enough, 4GB left should be plenty). Any ideas?
      My Computer


  2. Posts : 1,020
    Windows 10 Pro 20H2 19042.572
       #2

    How about filling out your "System Specs". It would help everyone in helping find a solution to your issue.
      My Computers


  3. Posts : 25,011
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #3

    Marvo said:
    I don't get it. I assume Hyper-V is taking up the GPU or something? Only games don't work...
    I'm not a gamer, but I do use Hyper-V a lot.

    What you may not be aware of is that with Hyper-V enabled, even without any VM running, your host windows is running virtualised too.

    Kari said:
    Type 1 Hypervisors like Hyper-V must be started before operating system is loaded. Even the host OS runs then on top of the Hypervisor...
    Personalization possible pre-activation in VMware, not Hyper-V. Why? - post #2

    ... Because of this, Hyper-V reserves part of the GPU for virtualization even if it's not used and this reduces your gaming performance.
    The Real-World Impact of Hyper-V on Gaming - CPUs, Motherboards, and Memory - Linus Tech Tips

    ...or in your case, seemingly kills it.

    You may find this tutorial by @Kari useful and informative, Method two allows you to have a choice at boot of running with the Hyper-V hypervisor enabled or not. You can then run without Hyper-V when you want to run games.

    Run Hyper-V, VirtualBox and VMware on same Computer
      My Computers


 

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