Hi we have a Debian 64 bit system with qemu 0.9.1-10 ( uname -a = 2.6.26-2-amd64) installed . kvm is included and loaded to memory . Still when we create a VM we sometimes get the following error message: libvir: QEMU error : internal error unable to start guest: You do not have enough space in '/dev/shm' for the 499 MB of QEMU virtual RAM. To have more space available provided you have enough RAM and swap, do as root: mount -o remount,size=515m /dev/shm Or disable the accelerator module with -no-kqemu after we do the mount we can create the VM . Does that mean that kvm is not active because it seems that kqemu is an old way to do the duties of kvm e.g supply memory to VMs via /dev/shm thanks Zvi Dubitzky Email:dubi@il.ibm.com IBM Haifa Research Laboratory Phone: +972-4-8296182 Haifa, 31905, ISRAEL