[Bug 81898] New: [X-bdwmedia Bisected] Xf86 causes glxgears issue

[bugzilla-daemon at freedesktop.org]

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

          Priority: medium
            Bug ID: 81898
          Assignee: chris at chris-wilson.co.uk
           Summary: [X-bdwmedia Bisected] Xf86 causes glxgears issue
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: ming.yao at intel.com
          Hardware: All
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

The glxgears show black when X on and gnome-session started.
It is problem of Xf86.
The first bad commit is:

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

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