XLookupColor xtest fails for StaticGray at depth 8 with rgbBits > 8

Submitted by Aaron Plattner `@aplattner`

Assigned to Aaron Plattner @aplattner

NVIDIA Quadro cards have 10 bits per channel in the colormaps. This causes the XLookupColor test in the xtest suite to fail:

--- Testing with supported visual class StaticGray XLookupColor return RGB values r 19666 g 19666 b 19666 instead of r 19538 g 19538 b 19538.

This problem can be reproduced with the vesa driver by setting pScrn->rgbBits to 10 in VESAPreInit.

Version: git

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