[...] I've been battling to get my Sun Ultra-60
video switchable
through a Belkin 8-port KVM switch. [...]
In case it helps, I have a Belkin 8-port (might even be the same model
as yours) and my impression is that the KVM's idea of whether something
is connected is driven off voltage on the keyboard connector. For
example, if I have the KVM switched to a machine and everything's
working, then I pull the keyboard connector, the relay clicks and the
video goes away, even though I haven't touched the video connections.
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