Douglas S. Nagel wrote:
Jason, I don't think the screen issues are related to any typical video compression or interlacing issues.
Don't think "interlacing" as it relates to video display. Think "interlacing" as it relates to using 2 things to do 1 thing. In other words: the 2 GPUs sharing the load. It's merely an idea though, and there may be nothing to it. If Apple gave us a software switch to magically disable one of the GPUs, we could try this whole thing again and see if the artifacts/lines still exist. Unfortunately, there's no magic software switch that I know.
What's curious about the current problem is that the screen artifacts are usually contained within the preview or program monitors, which suggests to me a software issue. I think we can corroborate this by some reports I've seen of users getting their graphics card replaced by Apple and still having the issues.
I have no doubt it's a software issue. The question remains: whose software? Apple's or Adobe's? Personally, I think folks going through the grind of getting their GPUs replaced are wasting their time.
Regarding the OpenCL discussion: Users of the beta of OS 10.9.4 are reporting no remedy for these issues. Do we know for certain that the beta of OS 10.9.4 contains the latest version of OpenCL? I think it's supposed to be version 2.0
I'm not on the Apple Dev program, so I have no access to 10.9.4. I haven't a clue if they updated OpenCL to 2.0 in 10.9.4, but my gut tells me they wouldn't do that. They might for 10.10. For those with 10.9.4 beta, it would be really easy to find out. From a terminal window:
grep CL_VERSION /System/Library/Frameworks/OpenCL.framework/Versions/Current/Headers/cl.h
and check the output. If one of the lines says:
#define CL_VERSION_2_0 1
then it's OpenCL 2.0.
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