[Bug 1754084] Re: Freecad crashes at start

[Mathew Hodson]

*** This bug is a duplicate of bug 1782984 ***
    https://bugs.launchpad.net/bugs/1782984

** This bug has been marked a duplicate of bug 1782984
   Assertion `!xcb_xlib_threads_sequence_lost' failed with multiple applications

-- 
You received this bug notification because you are a member of Ubuntu
Sponsors Team, which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1754084

Title:
  Freecad crashes at start

Status in freecad package in Ubuntu:
  Invalid
Status in freecad package in Debian:
  Incomplete

Bug description:
  [Impact]

   * FreeCAD crashes at startup in Ubuntu 18.04.

   * Backporting the proposed fix will prevent FreeCAD from crashing.

   * The proposed upload will fix the issue by providing an environment
  variable in the freecad.desktop file. This environment variable will
  set LIBGL_DRI3_DISABLE=true.

  [Test Case]

   * On Ubuntu 18.04 with a system where a video card or some form of graphics acceleration is used, install freecad and run normally.
   
   This is printed at the console:

  FreeCAD 0.16, Libs: 0.16R
  © Juergen Riegel, Werner Mayer, Yorik van Havre 2001-2015
    #####                 ####  ###   ####
    #                    #      # #   #   #
    #     ##  #### ####  #     #   #  #   #
    ####  # # #  # #  #  #     #####  #   #
    #     #   #### ####  #    #     # #   #
    #     #   #    #     #    #     # #   #  ##  ##  ##
    #     #   #### ####   ### #     # ####   ##  ##  ##

  failed to create drawable
  [xcb] Unknown sequence number while processing queue
  [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
  [xcb] Aborting, sorry about that.
  freecad: ../../src/xcb_io.c:259: poll_for_event: Zusicherung »!xcb_xlib_threads_sequence_lost« nicht erfüllt.
  Abgebrochen

  [Regression Potential]

   * An environment variable disabling LIBGL_DIR3 is set in the
  freecad.desktop file. The affected functionality is limited to the
  FreeCAD process and any child processes.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/freecad/+bug/1754084/+subscriptions