[Bug 92492] New: [xf86-video-intel][SNA] Input lag on QT based applications

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92492

            Bug ID: 92492
           Summary: [xf86-video-intel][SNA] Input lag on QT based
                    applications
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/intel
          Assignee: chris at chris-wilson.co.uk
          Reporter: katratxo at perdomo.me
        QA Contact: intel-gfx-bugs at lists.freedesktop.org

Created attachment 118913
  --> https://bugs.freedesktop.org/attachment.cgi?id=118913&action=edit
Xorg.0.log

Thinkpad X230
Kernel: 4.2.3-1-ARCH
Distribution: Arch Linux
Package version: xf86-video-intel 1:2.99.917+478+gdf72bc5-2


There is a lag when using keyboard and mouse on QT based applications (e.g.
Skype, VirtualBox) but not in the rest of the system.

The lag is "solved" when using UXA acceleration - 
http://whitecape.org/stuff/30-uxa.conf

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