All VM's on VirtualBox goes to "Guru Meditation state " when KVM(virt-manager) VM's are 'power on'

[aeronwin]

Hello Team

I am running a host pc ----> Linux GS-4184 4.15.0-64-generic #73-Ubuntu SMP Thu Sep 12 13:16:13 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

I have created three VM's on Virtualbox names as Client1,Client2,Client3 each 4GB RAM and less than 10GB Memory all are Ubuntu VM's which were running properly before installing KVM. I poweroff the VM's from Virtualbox and installed KVM(virt-manager) and created 3 VM's Database,Server,MyServer all were ubuntu VM's 3GB RAM and less than 10GB memory.But as soon as i power on the VM's on KVM my virtualbox VM's goes to "guru meditation state" whenn i click on ignore the get automatically poweroff.At a time am able to run only either Virtualbox VM's or KVM' VM's but i want to run it simultaneously(Because i want to create a VM as a server in KVM which should be in running state so that client VM's on KVM should request it for service ) But i dnt know it is possible or not to run this kvm and VB simultaneously if not then why? If it is possible to use KVM and Virtualbox simultaneously then please give me the solution to resolve this issue.

[Socratis]

Duplicate of #18977.