- Update to version 2.20.8:
  + Some bugs fixed, see below
  + Enabling ValleyView SDV
- Bugs fixed since 2.20.7:
  + Add an extra layer of defence against trying to use a non-GEM device
    with UXA. This should already be taken care of with the new probe,
    but the extra sanity check already existed in the code but was doing
    nothing.
    https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/962892
  + Fix computation of valid CRTCs bitmask for ZaphodHead
    Some systems can only handle certain outputs on certain pipes
    (Screens), and this information was not being propagated through to X
    and randr correctly, breaking valid configurations and not detecting
    invalid configurations correctly.
  + Disable global glyph caching with ZaphodHeads.
    The glyph privates need to be Screen private, but at the moment are
    global leading to conflicts and invalid rendering with multiple heads.
    https://bugs.freedesktop.org/show_bug.cgi?id=54707
  + Prevent direct read back of unmappable buffers
    https://bugs.freedesktop.org/show_bug.cgi?id=54808
  + Tile large uploads whilst replacing the alpha channel
    https://bugs.freedesktop.org/show_bug.cgi?id=54808
  + Correct the source offset when converting a RENDER composite
    operation into a BLT composite operation.
    https://bugs.freedesktop.org/show_bug.cgi?id=54868
  + Correct a minor typo in flattening alphamaps which caused the
    replacement pixmap to often end up with a height of zero.
    https://bugs.gentoo.org/show_bug.cgi?id=434860
  + Don't discard the CPU damage if only part is being replaced.
    This is most evident when combining software renders like Opera with
    accelerated rendering.
    https://bugs.freedesktop.org/show_bug.cgi?id=54937

- Update to version 2.20.7:
  Continuing the flurry of releases, this week saw the release of
  xorg-1.13 bringing with it the first steps towards hotpluggable gpu
  support and the ability to offload DRI rendering onto other GPUs. In
  light of that advance, this release includes the support code by Dave
  Airlie to integrate PRIME into xf86-video-intel and make those new
  features available.
- Aside from landing PRIME, a few other bugs were fixed since 2.20.6:
  + Fix framebuffer leak on server regeneration
  + Fix texture cache flushing on IvyBridge and Kwin with plastique
    https://bugs.freedesktop.org/show_bug.cgi?id=54488
  + Redirect large solid fills on SandyBridge+. By large I mean greater
    than 8192 or 16384 pixels on SandyBridge and IvyBridge respectively.
    https://bugs.freedesktop.org/show_bug.cgi?id=54134
  + Fix up backlight option handling in the manpage and uxa.
    https://bugs.freedesktop.org/show_bug.cgi?id=54397
  + Unbreak ZaphodHeads.
    https://bugs.freedesktop.org/show_bug.cgi?id=52438

- Update to version 2.20.6:
  A serious bug that caused a crash on SandyBridge and IvyBridge when
  mixing CPU and GPU operations on the same buffer, and an annoyance from
  bad scheduling of windowed swapbuffer updates causing low framerates and
  jitter. Plus the usual smattering of assertion fixes and a long standing
  issue with incoherent page access to a streaming buffer.
- Bugs fixed since 2.20.5:
  + Low frame rates in Blobby Valley when "fullscreen"
    https://bugs.freedesktop.org/show_bug.cgi?id=54274
  + Incoherent concurrent access with the CPU and GPU
  + Add Option "Backlight" to override automatic selection of the
    backlight interface.
  + Avoid overwriting the composite operation info when testing if we
    can transfer the operation to the BLT.

- Update to version 2.20.5:
  Another silly bug found, another small bugfix release. The goal was for
  the driver to bind to all Intel devices supported by the kernel.
  Unfortunately we were too successful and started claiming Pouslbo,
  Medfield and Cedarview devices which are still encumbered by propietary
  IP and not supported by this driver.
- Bugs fixed since 2.20.4:
  + Only bind to Intel devices using the i915 kernel module
  + Regression in the bitmap-to-region code, e.g. icewm window buttons
    https://bugs.freedesktop.org/show_bug.cgi?id=53699

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