[Bug 93388] [i965, regression, bisection] MESA_FORMAT_B8G8R8X8_SRGB changes break kwin

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93388

            Bug ID: 93388
           Summary: [i965, regression, bisection]
                    MESA_FORMAT_B8G8R8X8_SRGB changes break kwin
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: mike at fireburn.co.uk
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Since the 3 patches were added:

i965: Use MESA_FORMAT_B8G8R8X8_SRGB for RGB visuals
i965: Add B8G8R8X8_SRGB to the alpha format override
i965: Add MESA_FORMAT_B8G8R8X8_SRGB to brw_format_for_mesa_format

Kwin no longer starts correctly on my Skylake system with FW5.17 & Plasma 5.5

I can still see the console and the mouse renders and I can see a popup telling
me the wifi has connected. If I disable compositing I can logon, but opening
the compositor settings the control panel segfaults in i965_drv.so

Going back to the previous commit before these patches solves the issue for me

Please let me know if you'd like any more details or logs

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