On Tue, Oct 4, 2016 at 11:07 AM, Piotr Kliczewski <piotr.kliczewski(a)gmail.com&gt; wrote: Francesco and me looked at it few weeks ago. There is a global udev context in one of the library we use, and this context __del__ is called during shutdown, which never works since python is halfly destructed at this point. I think the issue was in blivet. The solution for this is to replace the automatic initialization on import and destruction on system shutdown by explicit life cycle in the library. This can be also solved in udev by writing proper C extension instead of using ctypes. Nir