[Bug 111583] New: 30 bit colors causing banding with default settings

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111583

            Bug ID: 111583
           Summary: 30 bit colors causing banding with default settings
           Product: xorg
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: helios.solaris at gmx.ch
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 145295
  --> https://bugs.freedesktop.org/attachment.cgi?id=145295&action=edit
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.

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