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[Piotr Kloc <pepko94@xxxxxxxxx>]

It's Nvidia's problem.
https://devtalk.nvidia.com/default/topic/729908/linux/-gt-334-21-redrawing-problems-in-gnome-3-10-3-12-gtx-580/4/
Hopefully it will be fixed by end of January.

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https://bugs.launchpad.net/bugs/1354023

Title:
  Screen contents are not being redrawn unless moving window off screen.

Status in Unity:
  New
Status in compiz package in Ubuntu:
  New
Status in unity package in Ubuntu:
  New

Bug description:
  Nvidia 340.24 Ubuntu 14.04.1 GTX 550Ti

  Let's say that I'm scrolling through web page in firefox. It's not redrawing so I have to drag window for it to redraw.
  Another example: I'm in Ubuntu Tweak, just toggled some stuff but it's not showing button change. I have to drag window off screen to properly redraw.
  Another example: Nautilus, I'm scrolling but it's not showing that it's scrolling. Again need to move window off screen and back to see changes.
  Another one: I'm writing right now and when I press Enter nothing happens, I have to press it again but cursor goes two rows down. Oh and now word "rows" is still in previous line with cursor so I have one ghost cursor and one in front.

  I think it's understandable now.

  I have this bug since 14.04 alpha, I though it's some dev crap and
  just made switch to Arch. Since 14.04.1 you have nice Vsync so I'm
  back.

  My guess: Someone at Cannonical tried to implement "reuse screen
  contents" from Kwin but failed.

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