virtualbox.org

I change computer with Ryzen7 but a VM doesn't work.
I attach the log. Thank you.

Please expand on "doesn't work".

The machine starts but then remains the flashing cursor and the black screen.
It does not go further.

Describe the procedure you used to move the VM between hosts? I noticed for example that the VM is using a 32bit template, which seems unlikely these days, plus the name of the VDI is not the same as the VM name, arguing that the VM and the VDI may have become separated at some point in time.

I transferred the HD disk directly from one computer to another, as it was basic linux I did not find any problems.
Can I change the 32bit to 64bit profile without reinstalling the VM?

You transferred the disk, and then what? Did you already have that VM on the target PC or did you then create a new VM around the disk?

> Can I change the 32bit to 64bit profile without reinstalling the VM?
Certainly, it's a simple VM settings change. But, we don't know that was the problem - or that it's the only problem.

Moving a bare HD invites the type of problems seen here. Now we don't know what was the original settings for the VM. The correct way to move a VM is described here: FAQ: How to move a VM.

I tried to use another operating system instead, linux UbuntuMate and with that and version 5.1.32 works. Having installed it in another partition I verified, without changes, that in Debian8 and VM 5.2.26 it does not work and with Ubuntu and 5.1.32 it works.
You tell me how to change the 32-bit 64-bit profile, please
Bye

In the VM settings, General|Basic tab, change the "Version" field to Ubuntu (64bit). If you don't see that option then the host is not properly configured (Hyper-v enabled or VT-x not enabled in host BIOS).