On Fri, 2017-02-17 at 22:47 +0530, dhara buch wrote: > Hello, > > I have installed Ubuntu 15.10 in which have installed Xen with > source. > > Booting is done with Xen as well as commands like xl infor, xl list > are also working fine. > > For creating Virtual Machine, I have installed Virtual Machine > Manager, but when I try to run it, it gives error as follows: > > Unable to connect to libvirt. > > internal error: libxenlight state driver is not active > This means you have not installed the libvirt, libxl driver. Or that you have, but trying to load it is failing. There should be something in the libvirt logs. However, since you said you've installed Xen from sources, you probably need to build and install libvirt from sources too. In fact, I don't know how exactly it is in Ubuntu, but in all the distro I've tried, trying to install libvirt-daemon-driver-libxl (or whatever the package is called), would fail, unless Xen hypervisor, toolstack and libraries are also installed with the distro package mamanger. If that is not the case, install would either fail, or would bring in those Xen packages, which would then either overrun or conflict with your source installation. > Verify that: >  - A Xen host kernel was booted >  - The Xen service has been started > > I tried by installing libvirt as > apt-get install libvirt-bin > > but, still the same problem is found. Libvirtd service is also not > getting started. > > Where am I lacking? > As said above. In all the distro I tried, when I build Xen from source, I've always also had to build libvirt from sources. Regards, Dario -- <> (Raistlin Majere) ----------------------------------------------------------------- Dario Faggioli, Ph.D, http://about.me/dario.faggioli Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)