Display colorsync profile remains unapplied?

[Roland Torres]

Christopher,

I think you may be in luck, as far as a quick 'n' dirty workaround  
goes. First, run the two displays independently (not in mirrored  
mode), and set each of them individually to have the profile you want  
(say, the Sanyo XP50/55 profile). Then, switch to mirrored mode. You  
will notice that the second monitor retains the last color profile  
selected for it. At least, this works for me (10.4.9), so it will  
likely hold true for you (10.4.8) as well.

Roland

On Mar 27, 2007, at 9:26 PM, Christopher Hunt wrote:

> Thanks Roland - good to know that others can see this too. I  
> actually think this bug may have been around for a while as we're  
> running 10.4.8 on our remote machine. I have also witnessed this on  
> 10.4.9.
>
> Do you know of a method to confirm what profile is being used on  
> the secondary display when mirrored? It'd be good to have this  
> information for when I report the bug to Apple.
>
> Meanwhile I think I'll select the Sanyo XP50/55 profile for both  
> displays so at least they look similar.
>
> Thanks for helping me get to the bottom of this.
>
> Kind regards,
> Christopher
>
> On 28/03/2007, at 12:42 PM, Roland Torres 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.
>>
>> 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.
>>>
>