I had a quick google and grepped through the v0.5.7 but don't see TCP keepalives being used.
We're running RHEV 3.2 in a couple of sites and find that if we have a SPICE session to a VM open but idle for for around 15 minutes, it disconnects. This is annoying our users.
Is there a way to stop these idle timeouts? Would implementing TCP keepalives be a solution?