[Bug 90138] New: minor font corruption on baytrail since sna: Enable blitting with Y-tiled surfaces

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90138

            Bug ID: 90138
           Summary: minor font corruption on baytrail since sna: Enable
                    blitting with Y-tiled surfaces
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: adf.lists at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

On J1900 baytrail dri2 with Xorg 1.16 (xserver 1.16.4), recent git kernel/mesa.

Since ddx commit 

75d87762471e195dddd73056fc6a06e17db1c8b0 
sna: Enable blitting with Y-tiled surfaces

I get some minor corruption on fluxbox menus sometimes also on toolbar. Fonts
in xterms are not affected.

xorg log + screen attached

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