Re: VSYNC problems on Fedora 21/22 and Intel HD graphics...

On Wed, May 27, 2015 at 03:37:29PM -0400, Alex G.S. wrote:
   First of all I love the new GNOME 3.16 release.  The notifications and
   system tray icons (in the left) are great and productivity boosters. 
   However, I'm having some issues with Intel HD graphics on X11 that make
   things very difficult.  Though these problems are solved by the Wayland
   session it's still too unstable for me to use in production as a
   day-to-day desktop.
   Intel® Core™ i5-4200M CPU @ 2.50GHz × 4
   Intel® Haswell Mobile (HD 4600, i965) 
   Version 3.16.2
   At work I use two external monitors in addition to the laptop screen. 
   VSYNC often breaks when using either SNA or UXA at random intervals.  It
   also breaks also when I fullscreen any application in any monitor.  Even
   when I force VSYNC in both xorg.conf and drirc it doesn't seem to help.
   These are configurations for reference:
   Section "Device"
      Identifier  "Intel Graphics"
      Driver      "intel"
     Option      "AccelMethod" "sna"
     Option      "TearFree" "true"
     Option      "SwapbuffersWait" "true"

Try Option "DRI" "2" in conjunction to the above.

Chris Wilson, Intel Open Source Technology Centre

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