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[Daniel van Vugt <daniel.van.vugt@xxxxxxxxxxxxx>]

Verified this bug appears fixed with the latest trunk Xmir code. However
the fix is an illusion. It's actually bug 1502738. And if you enable the
fix that's ready for that bug then this bug reoccurs.

** Changed in: mesa (Ubuntu)
       Status: Confirmed => Invalid

** Changed in: xorg-server (Ubuntu)
       Status: Incomplete => Triaged

** Changed in: xorg-server (Ubuntu)
   Importance: High => Medium

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https://bugs.launchpad.net/bugs/1211186

Title:
  [regression] GL(X) apps don't have vsync when running under XMir

Status in Mir:
  Invalid
Status in mesa package in Ubuntu:
  Invalid
Status in xorg-server package in Ubuntu:
  Triaged

Bug description:
  When using XMir, GL apps are not synchronized to vblank correctly. For
  example using glxgears...

  XMir:
  Running synchronized to the vertical refresh.  The framerate should be
  approximately the same as the monitor refresh rate.
  5632 frames in 5.0 seconds = 1126.334 FPS
  5136 frames in 5.0 seconds = 1027.137 FPS
  4686 frames in 5.0 seconds = 937.086 FPS
  4519 frames in 5.0 seconds = 903.775 FPS
  4469 frames in 5.0 seconds = 893.723 FPS
  10179 frames in 5.0 seconds = 2035.627 FPS

  Regular X:
  Running synchronized to the vertical refresh.  The framerate should be
  approximately the same as the monitor refresh rate.
  306 frames in 5.0 seconds = 61.115 FPS
  301 frames in 5.0 seconds = 60.080 FPS
  302 frames in 5.0 seconds = 60.275 FPS
  301 frames in 5.0 seconds = 60.081 FPS
  301 frames in 5.0 seconds = 60.078 FPS
  301 frames in 5.0 seconds = 60.081 FPS

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