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[Bug 1378188] Re: [GNOME3 Staging PPA] strange shadow rendered where client-side decorations are used


This bug was fixed in the package xserver-xorg-video-intel-lts-utopic -

xserver-xorg-video-intel-lts-utopic (2:2.99.914-1~exp1ubuntu4.5~trusty1) trusty; urgency=medium

  * Backport utopic package for lts-utopic stack.

 -- Timo Aaltonen <tjaalton@xxxxxxxxxx>  Mon, 11 May 2015 14:35:11 +0300

** Changed in: xserver-xorg-video-intel-lts-utopic (Ubuntu Trusty)
       Status: Fix Committed => Fix Released

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  [GNOME3 Staging PPA] strange shadow rendered where client-side
  decorations are used

Status in xserver-xorg-video-intel package in Ubuntu:
  Fix Released
Status in xserver-xorg-video-intel-lts-utopic package in Ubuntu:
Status in xserver-xorg-video-intel-lts-utopic source package in Trusty:
  Fix Released
Status in xserver-xorg-video-intel source package in Utopic:
  Fix Released

Bug description:
  The Intel video driver has a bug that can cause to incorrectly draw certain trapezoids. This is visible when using client side decorations in GNOME 3 (see attached screenshots).

  [Test Case]
  Run GNOME 3 with client side decorations on Intel hardware.
  Observed result:
  Shadow under window is missing corners.
  Expected result:
  Shadow looks correct.

  [Regression potential]
  Low. The fix is from upstream and just changes the logic error in the CompositeTrapezoids routine.

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