I cannot enable avx2 on Ubuntu 22.04 guest VM in VirtualBox7. I followed different ways but the issue persists (i.e., I get nothing when I do grep avx /proc/cpuinfo in my guest VM).
What I have tried:
First I tried VBoxManage setextradata "guest_name" VBoxInternal/CPUM/IsaExts/AVX2 1 and VBoxManage setextradata "guest_name" VBoxInternal/CPUM/IsaExts/AVX2 1, but didn’t get avx2 according to /proc/cpuinfo of my guest.
Then, based on the answer to this I tried the following:
- Opened a Command Prompt in Windows Host as Administrator and did
bcdedit /set hypervisorlaunchtype off - then, I do
DISM /Online /Disable-Feature:Microsoft-Hyper-V. But I get this error:
Error: 0x800f080c
Feature name Microsoft-Hyper-V is unknown.
A Windows feature name was not recognized.
Use the /Get-Features option to find the name of the feature in the image and try the command again.
So, I checked the list of features through Control Panel->Program And Features to see whether I have any features seemingly relevant to hyper-v, but there is none.
I also unchecked the feature Virtual Machine Platform through Control panel to see whether it makes any difference, after I try VBoxManage setextradata "guest_name" VBoxInternal/CPUM/IsaExts/AVX2 1 again, but I still don’t have avx2 on my guest VM.
