[Bug 68716] New: [SNA][HSW] Dragging windows in Gnome3 overview is less smooth than with UXA

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68716

          Priority: medium
            Bug ID: 68716
          Assignee: chris at chris-wilson.co.uk
           Summary: [SNA][HSW] Dragging windows in Gnome3 overview is less
                    smooth than with UXA
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: paul104x at yahoo.de
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Created attachment 84868
  --> https://bugs.freedesktop.org/attachment.cgi?id=84868&action=edit
Xorg.0.log using UXA

As mentionend in the title, dragging windows in the overview of Gnome3 is quite
jerky with SNA. With UXA doing the very same things is as smooth as you would
expect. (see the screencasts).
In both cases, the X config just contained the AccelMethod.

This is on a
$ lspci -vnn | grep VGA
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3/4th
Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06) (prog-if
00 [VGA controller])

using

xf86-video-intel 2.21.15
mesa 9.2
linux from danvet's drm-intel-next-queued branch from around 20th August (the
hash is bogus since I have applied some patches locally)

and standard Gnome 3.8, so using mutter as the WM.

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