Re: LaCie Blue eye (some clarifications.....)
Re: LaCie Blue eye (some clarifications.....)
- Subject: Re: LaCie Blue eye (some clarifications.....)
- From: "tom lianza" <email@hidden>
- Date: Mon, 17 Jun 2002 07:54:00 -0400
David Tobie wrote:
>
Yeah and if you don't have the USB cable hooked up the Blue Eye software
>
cannot initialize the monitor on start-up. The cable must always be
>
connected
Ah, now that is the most interesting comment I've seen in this whole thread!
So, the cable flashes the DDC chip in the monitor on startup... even though
the settings have not been changed since the monitor last ran. I'll have to
check out the DDC specs and see what the standards for that are... I would
wonder why the software needs to initialize the monitor, if the settings are
the same until changed.
/**************************************************************/
The need to communicate with the monitor upon start up is based upon a
number of factors and the exact startup activity is a function of the
specific monitor. As I have mentioned in this group in a number of
responses, the DDC specification does not dictate that a monitor have a
specific set of features, it only specifies that a minimum, it reports back
to the system the features that it supports. A monitor that is DDC2c
compliant may have virtually no remote features, the only requirement is
that the monitor report this lack of features properly when requested.
David's statement "even though the settings have not been changed since the
monitor last ran", illustrates a bit of a misconception about the state of
the art....certainly not David's fault, the technology is in a constant
state of flux and if you are not involved in it at the detailed engineering
level, it's easy to make wrong assumptions.
Some monitors do not allow remote lock out of the control panel, hence a
customer can make a change that can effect calibration outside of the
application. The only way to determine if the settings haven't changed is to
check them when the app powers up and at hard power ups. Some monitors do
not support saving remote settings hence they must be restored on power up.
A customer may move the monitor from one card to another card when
installing a second monitor.There are a host of reasons why the monitor must
be looked at power up and why the USB plug is left in place. Note on the
Apple displays, the USB communications are contained in the display
connector and always present. It is the same exact situation in the Blue
Eye cable.
Tom Lianza
Sequel Imaging Inc.
25 Nashua Rd
Londonderry, NH 03053
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