28 Oct
2008
28 Oct
'08
12:11 p.m.
I'm hoping someone can shed light on this. For the past week, I've been
battling to get my Sun Ultra-60 video switchable through a Belkin 8-port
KVM switch. The monitor is a Samsung 214T 20" LCD.
- Connect monitor directly to workstation with a 13W3 Sync-On-Green
adapter (no passthrough of sync signals): Works fine.
- Connect monitor directly to workstation with a 13W3 adapter that brings
out H+V sync: Works fine.
Does this adapater do anything to the green signal? Is it possile that
the monitor is still using sync-on-green and ignroing the H and V Syncs
from the adapter (if, indeed, they're even active)?
- Connect either of the above to a port on the KVM switch: Switch does
not recognize that anything is connected and refuses to pull in the relay
(I can hear an audible click from any channel with recognized video). The
status LED on the KVM keeps flashing to say "no one there!". Obviously no
video.
- Purchase Belkin Sun adapter box from eBay and connect it between the U60
and the KVM: KVM recognizes that video is there and pulls in the relay.
Does this just connect ot the video port on the switch, or to the
keyboard and/or mouse ports as well? It wouldn't suprise me if checking
for +5V on, say, the keyboard port was part of the 'I have a computer
connected' detection.
If it does just connect to the video port, it's possible that the swithc
needs active sync signals on the H and/or V lines. Have you stuck a
'scope on the outputs of the adapter to see just which signals are active?
The monitor _seems_ to believe that something is
there, as the blinking
green "nothing attached to me" LED goes solid on. However, nothing ever
appears on the screen. I tried all DIP switch settings on the adapter
(connected to Sun monitor sense lines).
- In desperation, connect monitor directly to HD15 port on the Belkin
adapter: Same thing. Solid green LED, no display.
Do you use the same connector on the monitor in all tests, or are the
first 2 using BNC sockets or similar? It's possible the the monitor
wi;ll not accept sync-on-green over the DE15 connector.
It would be intereting to know what, if anything, is coming out on the H
and V lines of that adapter
-tony