Re: i5 & i7 auto graphics switching
Re: i5 & i7 auto graphics switching
- Subject: Re: i5 & i7 auto graphics switching
- From: Trygve Inda <email@hidden>
- Date: Mon, 13 Sep 2010 00:52:17 +0000
- Thread-topic: i5 & i7 auto graphics switching
> On Sep 11, 2010, at 10:57 PM, Trygve Inda wrote:
>
>>> On Sep 11, 2010, at 10:52 AM, Trygve Inda wrote:
>>>
>>>> Is there a way to be notified when the graphic card is switched?
>>>
>>> NSApplicationDidChangeScreenParametersNotification
>>
>> When it is running on the slow card, the CGDirectDisplayID will be x, and on
>> the fast card it will be y. Is there anyway to derive x from y or y from x?
>>
>> I am trying to be able to uniquely identify screens even before/after a
>> processor switch.
>
> Perhaps the index in the display list (either of +[NSScreen screens] or
> CGGetActiveDisplayList())? Alternatively, based on position?
>
> Regards,
> Ken
Position is actually a good idea.
Do you have an i7/i5 ?
On my pre-i7/i5 MBP 15, the two graphic cards differ by 2 on the
CGDirectDisplayID. One other developer also reported this on i7/i5 systems.
I know it is not great to rely on this, but does anyone have a case where is
differs by other than 2?
Trygve
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