Display colorsync profile remains unapplied?

[Roland Torres]

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.

Roland

On Mar 27, 2007, at 7:19 PM, Christopher Hunt wrote:

> Hi Roland,
>
> Thanks for your reply. I am using the one card with two DVI ports  
> on the same card. When I mirror the display I only get one panel.  
> When I un-mirror I get two panels - one for each display. The  
> settings of this panel I get when mirroring generally apply to both  
> displays e.g. if I change the resolution then the setting will be  
> effected on both (as you'd expect). However if I change the color  
> sync selection to Generic RGB then only the main display shows a  
> change in colour.
>
> Are you mirroring the displays or are you using two cards and one  
> DVI port from each or one card and both DVI ports (like me)?
>
> Kind regards,
> Christopher
>
> On 28/03/2007, at 10:40 AM, Roland Torres wrote:
>
>>
>> On Mar 27, 2007, at 5:14 PM, Christopher Hunt wrote:
>>
>>> OK, I've rebooted the machine and have now seen the display  
>>> myself. To me it looks as though display 2 is using the settings  
>>> of the Generic RGB profile where display 1 is using the Sanyo  
>>> XP50/55 profile (which is dimmer). Now it could still be to do  
>>> with the differences discussed between the projectors etc., but I  
>>> just don't "feel" that it is having looked at the screens  
>>> physically - the blue just looks too different - richer on  
>>> display 2 (the brighter one).
>>>
>>> I performed a little experiment here and note that if I mirror  
>>> two displays (doesn't matter what type of displays these are) and  
>>> select Generic RGB, the secondary display does not effect the  
>>> setting. I suspect that the secondary display uses the default  
>>> setting for the monitor based on what it looks like to me.
>>>
>>> Does this concur with anyone else's observations? Should you not  
>>> expect that the colour profile setting is effected to both displays?
>>>
>> Hi Christopher, if you're using the same video card, and a  
>> separate DVI port for each projector, then I would expect each  
>> display to get its own Prefs panel pop up on it, where you can  
>> choose the profile for each independently. Isn't this what you're  
>> seeing? We have a 2-headed setup here, and that's how it's working  
>> for us.
>