Guru Meditation Error

Discussions about using Windows guests in VirtualBox.
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MouMou
Posts: 2
Joined: 24. Mar 2021, 19:41

Guru Meditation Error

Post by MouMou »

Dear Sirs,

I would be gratefull if you can help me with this error that I am trying to solve since this morning.

When I start a virtual machine, in my case I am starting the Windows Server 2019 one, it shows me a critical error alert.


Could you please help me?
Thank you in advance

Moussa
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scottgus1
Site Moderator
Posts: 20965
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: PUEL
Guest OSses: Windows, Linux

Re: Guru Meditation Error

Post by scottgus1 »

Hyper-V is enabled and needs to be disabled. See HMR3Init: Attempting fall back to NEM (Hyper-V is active)

Additionally, the 2019 VM template may have a bug. Server 2019 will run in the 2016 template. Use the VM's General settings to change the Basic tab, Version dropdown to 'Windows 2016 64-bit'. Also check that the VM's System settings, Acceleration, Paravirtualization Interface says 'Hyper-V'. This is a comm channel provided by modern virtualization-aware OS's to talk to the hypervisor they're running on and is not the Hyper-V that blocks Virtualbox.

Also, another processor in the VM will probably help typical operation, and you have room:
Host CPU status:
00:00:02.787794 CPUM: Logical host processors: 16 present, 16 max, 16 online, online mask: 000000000000ffff
00:00:02.787794 CPUM: Physical host cores: 8
00:00:02.788089 Full Name: "AMD Ryzen 7 3800X 8-Core Processor "
Guest CPU settings:
00:00:02.076269 NumCPUs <integer> = 0x0000000000000001 (1)
But don't put more than two unless and until you put extra parallel-processing software in the VM that can fill up the extra processors. Server 2019 is Windows 10 on server steroids, and loves 2 processors.
MouMou
Posts: 2
Joined: 24. Mar 2021, 19:41

Re: Guru Meditation Error

Post by MouMou »

It works. Thank you so much, I appreciate. Forum's moderators are heroes. :D
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