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[Felix Moreno <info@xxxxxxxxxxx>]

Same problem and same fix as johnnobody, at the end i had to use
internal intel card instead of nvidia 331.

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https://bugs.launchpad.net/bugs/1277245

Title:
  nvidia prime causing mouse and screen to freeze

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  I upgraded to Ubuntu Trusty Tahr . Currently running with updates as of 6th Feb. 64bit. 
  After installing nvidia-prime and nvidia-331, i can see frequent mouse freezes. Once the mouse is frozen, it doesn't allow Alt+Tab functionality. Only way to get out of this is by pressing Ctrl+Alt+F1 . I can bring back by unloading and loading the psmouse module

  modprobe -r psmouse.

  lspci | grep VGA
  00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18)
  01:00.0 VGA compatible controller: NVIDIA Corporation GT218M [GeForce 310M] (rev a2)

  
  uname -a
  Linux Vostro-3300 3.13.0-6-generic #23-Ubuntu SMP Thu Jan 30 09:48:03 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
  cat /etc/lsb-release 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=14.04
  DISTRIB_CODENAME=trusty
  DISTRIB_DESCRIPTION="Ubuntu Trusty Tahr (development branch)"

  This issue does not occur while running the opensource driver.

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