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Select: VirtualBox NDIS6 Bridged Networking Driver. Click: OK. Select the bridged adapter in VirtualBox. You should now be able to restart VirtualBox, select bridged adapter for your network configuration for your virtual machine, and now names should populate in the Names dropdown; select your primary connection and you should be good to go now.
Next we need to connect COM9 port in Host to COM1 port in Guest OS for that open Oracle VM VirtualBox Manager and open the settings of your required virtual machine. Now, select Serial Ports and setup like shown below and click OK.
Enable VT-x/AMD-V in Virtualbox from Windows host pc. Open oracle virtual box installed folder location from cmd with administrator. cd C:\Program Files\Oracle\VirtualBox then run the command. VBoxManage modifyvm --nested-hw-virt on. is your vm name then enable nested VT-x/AMD-V in your virtual box
C:\Program Files\Oracle\VirtualBox>VBoxManage clonemedium "C:\Users\gavo\VirtualBox VMs\PyImageSearch - Practical Python and OpenCV 4th Edition" "Pyimage" --format VDI VBoxManage.exe: error: Permission problem accessing the file for the medium 'C:\Users\gavo\VirtualBox VMs\PyImageSearch - Practical Python and OpenCV 4th Edition' (VERR_ACCESS ...
"C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" startvm kubuntu --type headless In my example the VM is named kubuntu. You'll have to change it for your instance. Addon: If you need help finding the startup folder on your windows instance press keys Windows + R and enter shell:startup. Reference: 8.19. VBoxManage startvm
The issue was something had gone wrong during VirtualBox Manager installation. So, I uninstalled it and then reinstalled it. The first time I did it showed me some errors, so I repeated it again and this time I got a clean installation without any errors. I confirmed my ubuntu20.04 VM was now showing the correct CPU flags as I expected.
The RAM pre-allocation serves as a workaround, so that the VM does not crash during startup, but I'm not sure if it can serve as a permanent solution. The solution is to use VirtualBox 6.1.24 or newer (current version as of this writing is 6.1.32).
Then to stop the same VM, create a new shortcut with the target being: "C:\Program Files\Oracle\VirtualBox\VBoxManage.exe" controlvm {uuid} poweroff double-clicking these starts and stops the VM without any window staying open.
I was having the similar issue when using VirtualBox on Ubuntu 12.04LTS. Now if anyone is using or has ever used Ubuntu, you might be aware that how things are hard sometimes when using shortcut keys in Ubuntu.
scottgus1 Site Moderator Posts: 20945 Joined: 30. Dec 2009, 19:14 Primary OS: MS Windows 10 VBox Version: VirtualBox+Oracle ExtPack