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[David Harmon <1074956@xxxxxxxxxxxxxxxxxx>]

Timothée Girard:  I have an Alienware system, I've never been able to
nail down exactly what graphics card/chip it uses.

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https://bugs.launchpad.net/bugs/1074956

Title:
  Minecraft SIGSEGVs and hangs on exit, MC head dev says it's on the JRE

Status in “openjdk-7” package in Ubuntu:
  Confirmed

Bug description:
  Nearly every time I exit the Minecraft program on my Ubuntu system, it
  crashes with a SIGSEGV.  After this, the window frame remains (solid
  black) and does not respond to close requests.  A few minutes later,
  it closes and posts a system message to the effect of "the program
  "java" closed unexpectedly. [...] Your system does not have enough
  memory to automatically analyze the problem."

  Here are the exit messages from the console:
  ---
  SoundSystem shutting down...
      Author: Paul Lamb, www.paulscode.com

  #
  # A fatal error has been detected by the Java Runtime Environment:
  #
  #  SIGSEGV (0xb) at pc=0x00007f903c2eec58, pid=28809, tid=140257483912960
  #
  # JRE version: 7.0_09-b30
  # Java VM: OpenJDK 64-Bit Server VM (23.2-b09 mixed mode linux-amd64 compressed oops)
  # Problematic frame:
  # C  [libX11.so.6+0x33c58]  XQueryExtension+0x28
  #
  # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
  #
  # An error report file with more information is saved as:
  # /home/dmh/Games/Minecraft/hs_err_pid28809.log
  #
  # If you would like to submit a bug report, please include
  # instructions on how to reproduce the bug and visit:
  #   https://bugs.launchpad.net/ubuntu/+source/openjdk-7/
  #
  ---
  I will try to attach the named logfile.

  I have tried reporting this to the Minecraft bug tracker, and the head
  developer (Dinnerbone) has said it's a JRE issue:
  https://mojang.atlassian.net/browse/MC-146

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