Comment 5 for bug 614176

From the upstream report, the bad kernel commit is:

commit b690e96cf9e6a6cde6f0393de47bdd6317ddb5de
Author: Jesse Barnes <email address hidden>
Date: Mon Jul 19 13:53:12 2010 -0700

    drm/i915: add pipe A force quirks to i915 driver

    Ported over from the old UMS list. Unfortunately they're still
    necessary especially on older laptop platforms.

    Fixes https://bugs.freedesktop.org/show_bug.cgi?id=22126.