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[Margarita Manterola <marga@xxxxxxxxxx>]

Several other people at my company have seen this issue, using Unity for
14.04. Also using nvidia.

Compiz segfaults when the lock screen is supposed to get rendered and
then the session is terminated, logging them out.

This started happening with the latest SRU, that ships:
  compiz 1:0.9.11.3+14.04.20150313-0ubuntu1
  unity 7.2.4+14.04.20150316-0ubuntu1

It was not happening before.

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https://bugs.launchpad.net/bugs/1451613

Title:
  Unity/compiz crashes when locking screen

Status in unity package in Ubuntu:
  Confirmed

Bug description:
  Since a recent update (around April 29th), sometimes (approximately once a day) when I lock my computer screen (CTRL+L or using system menu) the computer freeze for a while (2 to 30 seconds) before showing the login screen.
  Then when I try to unlock the screen I need to enter my password twice (with no error message after the first try).
  Once logged in, all applications are closed. Uptime is still running (since no reboot) and services too (with no interruption).

  Looking at the apport.log file (see attached) it seems that when I try
  to lock the screen, compiz crashes.

  I've attached the compiz crash file too (_usr_bin_compiz.1000.crash)
  but without the 100Mo data of base64 core dumb…

  
  I'm using Ubuntu 14.04 AMD64.
  Graphics drivers: nvidia-331.113 (tested)

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