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30 bit colors causing banding with default settings

Submitted by heliosh @heliosh

Assigned to Intel GFX Bugs mailing list

Link to original bug (#111583)

Description

Created attachment 145295
banding

When using a monitor that is capable of using 10 bit colors per channel, it is causing banding around the 128 value (see attachment, vertical step in the center).

Setting "DefaultDepth 30" in xorg.conf's screen section is reducing banding significantly.

Attachment 145295, "banding":
IMG_1383-1

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