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[dejan <dejan@xxxxxxxxxxx>]

I have changed the "Selection" render mode to "OpenGL Occlusion Queries" under User preferences -> System tab. 
Default is Auto. Now the viewport selection is fast.

System: 
-Ubuntu 14.04.1 64bit 3.13.0-41-generic,
-Intel HD4600 (i5 4460),
-GTX 750Ti.


https://bugs.freedesktop.org/show_bug.cgi?id=34495

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https://bugs.launchpad.net/bugs/902618

Title:
  Blender crashes when an object is selected

Status in blender package in Ubuntu:
  Confirmed

Bug description:
  Blender crashes nondeterministically, but when it occurs, it's
  immediately following a right-click on an object.  I can right-click
  an unpredictable number of times just fine, but then suddenly poof!
  Blender instantly vanishes and I'm looking at the command line.
  Sometimes the very first right-click after starting Blender will crash
  it.

  All Blender 2.5x and 2.6x show this crash, including a recent 2.6
  compiled from source.    All versions of Blender were obtained as
  binaries in tarballs from the official Blender site, except source
  obtained through their svn (or was it git?) repository.  What about
  the official Ubuntu package for Blender?  Tried it too, and it
  crashes.

  I had been using ubuntu 11.04, with xubuntu-desktop added, when this
  problem started.   When 11.10 came out, I hoped it would fix the crash
  by updating some hypothetical buggy library or something, but no it
  didn't.

  It's a Heisenbug in that all attempts to create a small simple scene
  for testing don't lead to a  crash.  Apparently the bug senses when
  I'm doing serious work.  Scenes that do crash have meshes of only a
  few hundred quads, only 3 or 4 lights, and default textures.  There's
  plenty of CPU power and RAM.

  I suspect something other than Blender itself is the problem. Blender
  ran fine for hours at a time, but started crashing about three weeks
  ago.   Memory, disk check out ok, and all other complex software runs
  fine.   From years of experience with computers, software development
  and Linux, I get the impression it's a problem with some library or
  X11 version mismatch, maybe something with the windows manager or
  desktop system, or a misconfiguration of any of these.

  I will be happy to run any special debuggers or diagnostics to get to
  the bottom of this.

  Description:	Ubuntu 11.10
  Release:	11.10


  Strace and gdb running Blender don't reveal much. Here's a gdb run
  that crashed:

  (gdb) r
  Starting program: /home/darenw/SW/bin/blender
  [Thread debugging using libthread_db enabled]
  connect failed: No such file or directory
  ndof: spacenavd not found
  [New Thread 0x7ffff17ff700 (LWP 4659)]
  [Thread 0x7ffff17ff700 (LWP 4659) exited]
  [New Thread 0x7ffff17ff700 (LWP 4660)]
  [New Thread 0x7fffebfff700 (LWP 4661)]
  [New Thread 0x7fffeb7fe700 (LWP 4662)]
  [Thread 0x7fffeb7fe700 (LWP 4662) exited]
  found bundled python: /home/darenw/Blender/sw/blender-2.61rc-linux-glibc27-x86_64/2.60/python
  read blend: /home/darenw/proj/WiggleWave/anim/crash_dsw2727B.blend

  Program received signal SIGSEGV, Segmentation fault.
  0x00007ffff7f1fed8 in ?? ()
  (gdb)

  
  and strace's dying gasp ends with:

  munmap(0x7f9e4a5ca000, 65536) = 0
  ioctl(8, 0x40086409, 0x7fffc51d23c0) = 0
  munmap(0x7f9e4a6ea000, 128) = 0
  ioctl(8, 0x40086409, 0x7fffc51d23c0) = 0
  --- SIGSEGV (Segmentation fault) @ 0 (0) ---
  +++ killed by SIGSEGV +++
  Segmentation fault

  
  Oh yeah, there are debug symbols for the Ubuntu Blender package - let's try that:

  (gdb) bt
  #0  0x00007ffff7ecbed8 in ?? ()
  #1  0x00000008beff603e in ?? ()
  #2  0x0000000000000100 in ?? ()
  #3  0x00000000ffeaebe9 in ?? ()
  #4  0x0000000000000000 in ?? ()
  (gdb)

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: blender (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
  Uname: Linux 3.0.0-13-generic x86_64
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
  Date: Sat Dec 10 11:29:35 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: blender
  UpgradeStatus: Upgraded to oneiric on 2011-10-28 (43 days ago)

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