In my experience this lag is due to the machine checking
for the EDID from the monitor, especially if the machine supports HDMI out and
thus HDCP. I have found the Gefen
Detective Plus series a godsend in these cases: it records the EDID of a
monitor and then, when not even powered, can be left hooked up to the computer
as a monitor replacement. They are
available in both DVI and HDMI flavors:
> Hey guys, normally I have macs desktops, mini and
pros, hooked up to either a monitor or KVM of some sort. I've got a couple I wanted to just leave the
monitor off to save some room but it appears to cause some visual artifacting
with the screen not refreshing and added lag when remotely connected to the
machine.
>
> This is with this years mac mini and pro (within the
last 9 months). I'm using 10.8.4 and
10.8.5 with the latest ARD client on the machines (and the built in screen
sharing app). Anyone else see this issue
or found a way to prevent it without having to keep a monitor plugged into it
all the time. It's pretty bad, basically
you can't really connect to the visual console and it be useable.
