[Bug 85888] [Bisected] stuck pageflip

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85888

--- Comment #20 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
Created attachment 110912
  --> https://bugs.freedesktop.org/attachment.cgi?id=110912&action=edit
[PATCH] drm/i915: Don't call intel_prepare_page_flip() multiple times on gen2-4

I ran into similar problems on my 830 when frobbing around with the vblank
code. I belieeve this patch should help. Please test.

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