Failed to start the virtual machine

[GuitarFan]

Failed to start the virtual machine

Why?

[scott28tt]

This might help: https://communities.vmware.com/t5/VMware-Workstation-Pro/ULM-Failed-to-create-virtual-processor-0-af...

[yemhoang]

To disable mitigations, change the side channel mitigations setting in the advanced panel of the virtual machine settings. Refer to VMware KB article 79832 at https://kb.vmware.com/s/article/79832 for more details.

[GuitarFan]

Didn't help

[GuitarFan]

Didn't help 

[GuitarFan]

What's wrong?

[wila]

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@GuitarFan wrote:

What's wrong?

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This is what's wrong:

2023-08-21T09:48:20.360Z Wa(03) vmx ULM: Failed to create virtual processor 0, res 0xc0350050.
2023-08-21T09:48:20.361Z In(05) vmx Module 'ULM' power on failed.

The VM is trying to  use ULM, aka the Hyper-V hypervisor and your processor might not be supported somehow?
Googling on your processor along with Hyper-V mentions that you have to enable SVM in the BIOS.
https://www.goodtechmaster.com/how-to-enable-virtualization-amd-v-on-ryzen-processors/

I would guess that you already had to enable it when you still ran via the VMware hypervisor.. but it would be good to cross check.

If that still doesn't help.. go back to using the VMware hypervisor.. in other words, what Scott said.

edit: and in a little bit more details on how-to go back to the VMware hypervisor, see the answer from bluefirestorm here: https://communities.vmware.com/t5/VMware-Workstation-Pro/Can-not-start-any-VM-Exception-0xc0000005-a...

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Wil