[Bug 81898] [bdw false-bisect] Glxgears show black after start gnome-session in the default setting of X server

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81898

--- Comment #9 from yaoming <ming.yao at intel.com> ---
==Bisect results==
----------------------------
Bisect shows 1618d6cfa63e31ebaedadf575dcbdf5b07451bde is the first bad commit

    commit 1618d6cfa63e31ebaedadf575dcbdf5b07451bde
    Author:     Chris Wilson <chris at chris-wilson.co.uk>
    AuthorDate: Fri May 30 12:14:40 2014 +0100
    Commit:     Chris Wilson <chris at chris-wilson.co.uk>
    CommitDate: Mon Jun 2 08:32:10 2014 +0100

        sna/gen8: Set GT level

        We use the GT level to decide how favourable it is to use the GPU in
        various circumstances, now set it.

        Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

when run "X &" then "glxgears &"=> the glxgears show normal,
when run "X &" then "gnome-session & "then "glxgears &"=> the glxgears show
black.

Here is its parents commit:
    commit bb49222a514b1d6041f3d9530a22f5701377118b
    Author:     Chris Wilson <chris at chris-wilson.co.uk>
    AuthorDate: Mon Jun 2 08:25:52 2014 +0100
    Commit:     Chris Wilson <chris at chris-wilson.co.uk>
    CommitDate: Mon Jun 2 08:32:10 2014 +0100

        sna: Add DBG hints for using inplace CPU mmappings

        Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

when run "X &" then "glxgears &"=> the glxgears show normal,
when run "X &" then "gnome-session & "then "glxgears &"=> the glxgears show
normal.

All my testing results based on the default Xserver setting(SNA on).

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