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Laptop with reverse VGA
From: Jussi Peltola <pelzi () pelzi net>
Date: Mon, 20 Feb 2012 23:23:30 +0200

It practically requires more hardware than a separate IP KVM. Finding
RS-232 in a laptop is already nearly impossible, so I doubt this will
happen.

The keyboard/mouse part *might* be possible in some cases where these
devices have a usb interface somewhere in the middle. Still, you'd need
cables that break USB standards or a separate connector.

The display would require a scaler/processor/ADC/TMDS receiver, which are
found in every standalone LCD. This stuff consumes multiple watts (it
becomes hot enough to cook itself in a few years after all) so it will
not appear in a laptop any time soon.

An IP KVM or a USB KVM is the way to go. Then you are not bound to one
very weird laptop and have to hunt for a new one every few years to
upgrade. And you can copy-paste stuff, and lots of other benefits.

On Mon, Feb 20, 2012 at 09:14:48PM +0000, Mario Eirea wrote:
Ive wished this for years. Seems like it could be easy to achieve in theory. 

-Mario Eirea

On Feb 20, 2012, at 11:55 AM, "Matthew Petach" <mpetach () netflight com> wrote:

On Mon, Feb 20, 2012 at 7:34 AM, Jon Lewis <jlewis () lewis org> wrote:
Speaking of that sort of thing, I'd really LOVE if there were a device about
the size of a netbook that could be hooked up to otherwise headless machines
in colos that would give you keyboard, video & mouse.  i.e. a folding
netbook shaped VGA monitor with USB keyboard and touchpad.  I know there are
folding rackmount versions of this (i.e. from Dell), but I want something
far more portable.  Twice in the past month, I'd had to drive 100+ miles to
a remote colo and took a full size flat panel monitor and keyboard with me.
 Has anyone actually built this yet?

Seeing as how most laptops have a VGA connector
and a keyboard/mouse connector on them, albeit
wired in the wrong direction (VGA connector feeds
video out from the video card, keyboard port takes
in input from external keyboard), the wiring and hard
parts are already mostly done; I'd *love* to have a
vendor release a laptop line that has a toggle switch
on it that a) only engages when the laptop is off, and
b) flips the logic--keyboard port gets connected to the
output of the laptop keyboard, and sends data out
rather than receives data, while the VGA port is
disconnected from the video card, and is instead
connected to the LCD panel of the laptop.  If an
enterprise vendor added support for a toggle like
that, I'm sure there would be dozens of companies
that would order them in a heartbeat, to be able to
do away with the constant need for crash carts
rolling around the datacenter aisles.  Heck, even
I'd order one--I could finally get rid of the old monitors
I keep around the house for debugging random
server problems in the rack upstairs.  :/

Matt




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