[Bug 111499] [bisected][skl] Graphical corruption in kwin effects

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111499

            Bug ID: 111499
           Summary: [bisected][skl] Graphical corruption in kwin effects
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: Drivers/Gallium/Iris
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: mike at fireburn.co.uk
        QA Contact: intel-3d-bugs at lists.freedesktop.org

I've traced it back to:

commit 0f5be81eddfbdcb39a0de10afac2b2ec74790e70
Author: Jordan Justen <jordan.l.justen at intel.com>
Date:   Mon Jun 24 19:24:37 2019 -0700

    iris: Expose aux buffer as 2nd plane w/modifiers

    Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
    Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

I'm forcing Iris as my main OpenGL driver, i965 isn't compiled and I'm using:

>From 49b8c274947d4b625c2a9e0a1fdcb631a73d4903 Mon Sep 17 00:00:00 2001
From: Kenneth Graunke <kenneth at whitecape.org>
Date: Mon, 14 Jan 2019 00:32:33 -0800
Subject: [PATCH] NOT-FOR-UPSTREAM-YET: loader - prefer iris over i965

This lets me avoid having to set MESA_LOADER_DRIVER_OVERRIDE everywhere

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