[clug] KVM - usb+DVI

Geoff Swan shinobi.jack at gmail.com
Sun Dec 13 14:58:11 MST 2009

Make sure you check the specs of the DVI KVMs, the DVI standard can carry
analogue video (DVI-A), digital video (DVI-D), or both (DVI-I). It can also
be dual channel in some cases. I am guessing that as the VGA adapter doesn't
work you need one that specifically handles the DVI-D signaling. In terms of
the cost I would say it is mostly the new (and therefor perhaps not volume
enough) premium factor - there are chips designed specificaly for
switching/multiplexing DVI-D (similar to LVDS) signals, but I guess they
haven't come down in price enough yet. Switching high speed digital signals
does needs to be done properly - but once the design is verified there
shouldn't be a great deal of difference in the volume pricing compared with
VGA - unless you look for one that handles multichannel video (probably
doesn't exist - although if you had stupidly high def graphics card could be
useful) or does full DVI-I switching...
On Sat, Dec 12, 2009 at 3:12 PM, steve jenkin <sjenkin at canb.auug.org.au>wrote:

> anyone using a KVM that handles DVI natively?
> VGA + usb KVM's are cheap & plentiful...
> From a quick on-line check, ~$200 for a DVI KVM :-(
> Any reason they're expensive, apart from 'new and premium'?
> I can't get a new machine to work with a VGA adaptor, have to 'consider
> my options'.
> --
> Steve Jenkin, Info Tech, Systems and Design Specialist.
> 0412 786 915 (+61 412 786 915)
> PO Box 48, Kippax ACT 2615, AUSTRALIA
> sjenkin at canb.auug.org.au http://members.tip.net.au/~sjenkin
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