When you try to install virtual machine with virt-install or the Virtual Machine Manager you get the following Error:
root@syss:~# virt-install --connect qemu:///system --name syss-test --ram 1024 --disk syss-test.img,size=8 --network=network:default --vnc --noautoconsole --os-type linux --accelerate --cdrom /home/syss/Downloads/debian-7.6.0-amd64-netinst.iso
Starting install... ERROR internal error: Process exited while reading console log output: char device redirected to /dev/pts/45 (label charserial0) ioctl(KVM_CREATE_VM) failed: 16 Device or resource busy failed to initialize KVM: Device or resource busy
This is mostly because you have either VirtualBox or VMware running on the same machine. The reason (at least that’s what I think) is that the kernel module of VirtualBox or VMware and KVM can’t take Advantage of Intel VT-x or AMD-V at the same time.
So if you want to run both at the same time you have to deactivate the virtualisation in one of them.
This is a way where you can at least have the machines emulated with QEMU
root@syss:~# virt-install --connect qemu:///system --name syss-test --ram 1024 --disk syss-test.img,size=8 --network=network:default --vnc --noautoconsole --os-type linux --accelerate --cdrom /home/syss/Downloads/debian-7.6.0-amd64-netinst.iso --virt-type=qemu
Just add –virt-type=qemu at the end. This is not as fast as Intel VT-x or AMD-V but it works in parallell.