Interesting - I only just came across this thread, but one of my users reported
exactly the same thing a few weeks back. As the user just left the comment via
Twitter and I never received anything else, until I saw this thread it had gone
on my curious-must-look-at-that-in-the-future list. The strange thing is, my
app does no intensive drawing at all - it's a writing app, and although it has
some custom views, there are no animation effects or anything else that
requires special graphics processing. So I tried Jens' suggestion and added
"DYLD_PRINT_LIBRARIES" as an environment variable, and sure enough my app is
linking against the OpenGL framework too. Is this, as Noah says, the reason for
my program causing the switch to the NVidia graphics chip? I'm not explicitly
linking against the OpenGL framework, though - does this mean that another
framework I am linking against is invoking it? (I link against the QuickLook,
AddressBook, Carbon, QTKit,
QuickTime, Quartz, QuartzCore, WebKit and SystemConfiguration frameworks.)
Is this something I should be concerned about? As I'm not explicitly calling
anything that should do this, I'm assuming it's just a quirk of the system
caused by one of the frameworks I'm linking against, in which case I assume
there's not much I could do anyway.
Thanks and all the best,
Keith
--- ORIGINAL MESSAGE ---
Hi, I've had a query from a user of my software, and he says that when he runs
it, his MacBook Pro switches to use the NVidia graphics chip.
I haven't done anything in my program to specifically force that (and I'm not
sure whether it is possible to in normal Cocoa code). Is there something that I
specific I may have in my application that would force it to use that graphics
card?
Is there some way this user could run my program and force it to use the other
graphics processor?
Thanks
Gideon
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