Strange CTRL D at startup Debian VM

Hello,

Im pretty new to KVM and i would ask if someone got the same error or can help me troubleshooting it.

I have two unraid boxes with the same MB ( Gigabyte H97N WIFI ), both with 8 GB of ram, the only device that change between them is the CPU (one with a Pentium G3250 and one with a i5 4460)

Both have a virtual machine with Debian but only one of them (the one on the i5) at the VM boot ask everytime to press CTRL D to continue or use root password for a shell (yeah i tried to systemctl default or the other commands with no success).

In the VMs both has teamviewer but the one on the Pentium has only Crashplan and some Cron schedules and the one on the i5 has Dropbox and Cron schedules.

Iommu disabled on Pentium and enabled on i5.

I should say that happened already on the same machine with Xubuntu.

That CTRL D at startup of the VM is very annoying because is in a remote location and if i need to restart the VM or the unraid box i lose all my access to the machine trough teamviewer.

Thanks