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When will the opengl performance issues of the HD4000 driver be fixed? I have a graphics application that runs at about 20 fps on sandy bridge core i7 laptop (HD 3000). On a similarly configured ivy bridge laptop, it drops to about 1 fps.
The problem appears to be related to the depth buffer. When the depth buffer is turned off performance is quite acceptable although the accuracy of the generated image is not acceptable without the depth testing. When the depth buffer is turned back on, the performance suffers.
Again, on an HD3000 laptop performance without a dedicated GPU is quite acceptable. Why can't the HD 4000 driver perform at least as well as the HD 3000?
RKA
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What drivers did you use?
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15.28.12.64.2932 (9.17.10.2932)
Also tried the earlier driver (October), but didn't see any difference.
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Where can I get this version? I don't see it on the Intel download site.
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What is the source of this version? I hesitate to install any driver from a public file sharing site.
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[Edited for content] Performance on HD300 computers is still far superior.
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