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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO --- - [IVB/HSW/BDW Regression]black screen and system hang after booting with all display port"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74103#c4">Comment # 4</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO --- - [IVB/HSW/BDW Regression]black screen and system hang after booting with all display port"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=74103">bug 74103</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>Spotted by Ville:

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
b/drivers/gpu/drm/i915/i915_gem_context.c
index 310370d..fb64ab4 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -290,7 +290,7 @@ i915_gem_create_context(struct drm_device *dev,
                                goto err_unpin;
                        }

-                       ctx->vm = &dev_priv->mm.aliasing_ppgtt->base;
+                       dev_priv->mm.aliasing_ppgtt = ppgtt;
                }
        } else if (USES_ALIASING_PPGTT(dev)) {
                /* For platforms which only have aliasing PPGTT, we fake the</pre>
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