pcolor in R2016a broken when using Intel graphics?

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SimpleYeti
SimpleYeti on 29 Mar 2016
Edited: Rick Irons on 31 Mar 2016
I've run into a problem using 'pcolor' on R2016a. When I run the following:
[x, y] = meshgrid(linspace(0, 1, 200), linspace(0, 1, 200));
pcolor(x, y, ones(size(x)))
I get:
Obviously this is not correct. When I set 'opengl software' the problem goes away. This does not occur when using R2015a on the same laptop, and I believe it might be tied to the integrated graphics on the laptop in question (Intel HD Graphics 5500 on Windows 10 using the latest driver) as it does not occur on a desktop using Nvidia graphics. Is there anything that I can do to fix this problem without resorting to software OpenGL?
  4 Comments
SimpleYeti
SimpleYeti on 29 Mar 2016
Thank you for the suggestion, but imshow() is of much less utility than pcolor() when the background grid is important information.

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Accepted Answer

Rick Irons
Rick Irons on 29 Mar 2016
Edited: Rick Irons on 31 Mar 2016
This is a known driver issue that Intel has addressed in their recent 4380 driver. One workaround is to use the OpenGL hardware basic mode (“opengl hardwarebasic”). Another option is to disable the align vertex centers property (“h.AlignVertexCenters = 'off'") if it is available for the object demonstrating the issue.

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