Critical error during the boot of my VM

[fcarli3]

I got that message running my VM on which I have Ubuntu LTS 20.04

[scottgus1]

That log it mentions might be helpful, zipped, and attached as you posted the screenshot, please.

[fcarli3]

I attached it.

[mpack]

You get a triple fault the instant the guest tries to boot from the hard disk. Possibly implies disk corruption.

I also don't like the fact that you are using 3.3GB of the 3.4GB free RAM on your PC. Your PC only has 8GB to start with, so 3GB to a VM (plus 256MB graphics RAM) is always going to be a stretch - reduce to 2GB, and keep an eye on how many RAM hungry apps you have open on the host.

[fcarli3]

So, do you suggest me to reduce the used RAM to 2GB in order to try ro recover the VM ?

[mpack]

reduce to 2GB, and keep an eye on how many RAM hungry apps you have open on the host.

[fcarli3]

I reduced to 2GB, but I'm still not be able to start the VM

[mpack]

Try upgrading to the latest version of VirtualBox (6.1.16), remember to upgrade the extension pack too, and provide a new zipped log if the issue continues.

However, I'll point out that I didn't say that fixing the RAM issue would fix your problem - that was a separate issue that I picked up. The most likely cause of a triple fault error the instant a PC it tries to boot from hard disk is some kind of corruption of the boot code, or perhaps the OS was never installed correctly on the current host. I assume that you don't have a working backup?

[fcarli3]

I solved the issue reducing the used RAM and upgrading VirtualBox version and extension pack. Thank you!