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[Doug McMahon <1260128@xxxxxxxxxxxxxxxxxx>]

Just to note about the above - 
If nvidia-prime is used to switch to the intel gpu the xorg.conf is removed or moved to xorg.conf.xxxxxx
When switching back a new xorg.conf is created which will not contain the Option "TearFree" "True" line.

Whether whatever creates that xorg.conf should add the line by default is unknown here. 
(though if anyone can point to what/how creates the xorg.conf would like to know

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https://bugs.launchpad.net/bugs/1260128

Title:
  Nvidia-prime produces unbearable visual stutter

Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Triaged
Status in nvidia-prime package in Ubuntu:
  Triaged

Bug description:
  I've installed NVIDIA-Prime v0.5 on Ubuntu 14.04 with all required
  dependencies, on a Clevo 355STQ with a 765m.

  My issue is that whilst the new switching feature works very well, it
  still produces an extremely noticable amount of visual stuttering. In
  graphical and applications and games I can produce very large frames-
  per-second numbers yet the amount of visual tear makes the program
  unusable. Vsync/Sync to Vblank/vblank_mode=1 also does not work as
  intended, with tearing still present.

  Has anyone else had this issue or found a fix?

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