Hi, In libvirt-glib, we call virStreamEventAddCallback() and give it a ref, that is supposed to be unref when the stream event is removed. But this doesn't happen! I tracked it down to: static void remoteStreamCallbackFree(void *opaque) { struct remoteStreamCallbackData *cbdata = opaque; if (!cbdata->cb && cbdata->ff) (cbdata->ff)(cbdata->opaque); Why are we checking for cbdata->cb here? That gives us a leak when taking screenshots. So far I solved it with the attached patch for libvirt-glib. I noticed it because that of a resulting process & fd leakage in the libvirtd side. It might be that the fix should be in libvirt, but anyway, the proposed patch doesn't need a libvirt depedency update and also keeps the object reference manangement at the libvirt-glib level, which is nice. -- Marc-André Lureau