Display colorsync profile remains unapplied?

[Shawn Erickson]

On 3/27/07, Roland Torres <newslists at autonomy.caltech.edu> wrote:
> Hi Christopher,
>
> I just went over and ran a test. We are driving 2 screens from a
> single video card, not mirroring them, so we see individual color
> profile panels on each display. When I switched the setup to have
> mirrored displays, I see exactly what you are seeing: the color
> profile changes only the first display in the arrangement. The other
> display remains unchanged. So I think the primary issue here isn't
> your projectors, but this bug in 10.4.9.

A profile is specific to a physical display so it is correct behavior
to have displays retain their profile regardless of mirroring being
used (it shouldn't inherit the profile of the display it is
mirroring).

The real "bug" is that when mirroring is enabled the "Displays" system
preference doesn't provide a way to adjust the profile of the
secondary display in the mirror, you can only adjust the profile for
primary display in the mirror set.

As noted you can disable mirroring and then the "Displays" system
preference will expose the ability to adjust the profile of the
secondary display.

-Shawn