After several attempts I managed to solve.
I first made the conversion from vmdk - to Qcow2 via console with the following command:
qemu-img convert -O qcow2 startiamge - imagenew
Then I changed the disco type from SCSI to SATA leaving the VirtlO controller.
Hi I have the same problem, I'm trying to boot a working linux machine on Vmware Workspace. I made several attempts also going from Vbox and the present image also starting from a physical copy on Vmware the image always starts without problems. On Proxmox the boot happens correctly but then...