Posted by Sven Gothel on Mar 17, 2012; 12:00am
URL: https://forum.jogamp.org/Slow-startup-on-Macbook-pro-on-discrete-graphics-card-tp3832796p3833529.html

On 03/16/2012 07:55 PM, DrBlack [via jogamp] wrote:
>
>
> I am working with JOGL (latest stable version) on a 15" Macbook Pro running
> 10.6.8. My problem is that when I start any of my applications that make use
> of JOGL, it takes nearly 20 seconds for the application to start. For a good
> portion of that my display is completely frozen -- the cursor moves, but
> nothing else does. I initially wrote this off as some quirk of JOGL... until
> I watched someone run the same code on a 13" Macbook Pro and it started
> instantly.

This sounds like a bug we should have fixed:
  <https://jogamp.org/bugzilla/show_bug.cgi?id=548>
  <http://jogamp.org/git/?p=jogl.git;a=commit;h=835b36d626f75f9e96001a41c2a6fe9f90466ae1>

This version should have the fix included:
  <http://jogamp.org/deployment/jogamp-test/>

But since you use the latest greatest, looks like you found another possible
cause for this 'freeze', your dual GPU setup.

>
> After digging into this a little more I realized that the big difference
> between the two machines (other than the screen size and resolution) was
> that the 15" has two graphics options, integrated and discrete, while the
> 13" just has the integrated graphics option. When I force my machine to use
> the integrated card, apps start instantly. If I force it in the other
> direction to use discrete, I get the long startup times again. Not only is
> it strange that there is a difference, it is really bizarre that it works in
> the opposite direction than I would have expected.

Not really, switching to the discrete is some extra work driver and OS
has to perform ..

>
> Has anyone seen this before or know a fix (other than forcing the use of the
> integrated graphics option)? Should I file this as a bug?

Pls create a new bug, maybe mention/link to bug 548.

I cannot test it here, since I have no dual GPU setup.

I also don't know how to select one of the 2 GPUs you have available,
ie. are they available to a list of Display's via the OSX API .. or .. ?

The same is actually true on other OS .. no experience w/ such a setup yet.

How do other applications behave ?
Maybe check with some other native 'open source' demo and validate.

Have you also installed Windows - and if so, how does it behave on that machine ?

Guess we would need to help of a developer with such a machine available,
maybe you can help ?

~Sven