#0  0x00007f558af079e3 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f5588e04862 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f5588e05d5f in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f5588e05f7b in xcb_wait_for_reply () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#4  0x00007f558a90d289 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#5  0x00007f557eb9bf43 in DRI2GetBuffersWithFormat (dpy=0x9b6970, drawable=95, 
    width=width@entry=0xa24888, height=height@entry=0xa2488c, attachments=0x3d018d0, count=1, 
    outCount=outCount@entry=0x7fff1d9c12a4) at dri2.c:483
#6  0x00007f557eb99a1c in dri2GetBuffersWithFormat (driDrawable=<optimized out>, 
    width=0xa24888, height=0xa2488c, attachments=<optimized out>, count=<optimized out>, 
    out_count=0x7fff1d9c12a4, loaderPrivate=0xa24780) at dri2_glx.c:782
#7  0x00007f557e05dafb in intel_query_dri2_buffers (buffer_count=0x7fff1d9c12a4, 
    buffers=<synthetic pointer>, drawable=0xa24860, intel=<optimized out>)
    at intel_context.c:935
#8  intel_update_renderbuffers (context=context@entry=0xa172e0, 
    drawable=drawable@entry=0xa24860) at intel_context.c:355
#9  0x00007f557e05de12 in intel_prepare_render (intel=intel@entry=0xa45630)
    at intel_context.c:408
#10 0x00007f557e07475e in brw_try_draw_prims (max_index=3, min_index=0, ib=0x0, nr_prims=1, 
    prim=0x7fff1d9c13e0, arrays=0xad4c08, ctx=0xa45630) at brw_draw.c:459
#11 brw_draw_prims (ctx=0xa45630, prim=0x7fff1d9c13e0, nr_prims=1, ib=0x0, 
    index_bounds_valid=<optimized out>, min_index=0, max_index=3, tfb_vertcount=0x0)
    at brw_draw.c:583
#12 0x00007f557dbdb7f4 in vbo_draw_arrays (ctx=0xa45630, mode=6, start=0, count=4, 
    numInstances=1, baseInstance=<optimized out>)
    at ../../../../../src/mesa/vbo/vbo_exec_array.c:645
#13 0x00007f557510788a in nux::GraphicsEngine::QRP_GLSL_1Tex(int, int, int, int, nux::ObjectPtr<nux::IOpenGLBaseTexture>, nux::TexCoordXForm&, nux::color::Color const&) ()
   from /usr/lib/libnux-graphics-3.0.so.0
#14 0x00007f55750f1f49 in nux::GraphicsEngine::QRP_1Tex(int, int, int, int, nux::ObjectPtr<nux::IOpenGLBaseTexture>, nux::TexCoordXForm&, nux::color::Color const&) ()
   from /usr/lib/libnux-graphics-3.0.so.0
#15 0x00007f556e5aa731 in nux::WindowCompositor::PresentBufferToScreen(nux::ObjectPtr<nux::IOpenGLBaseTexture>, int, int, bool, bool, float, bool) () from /usr/lib/libnux-3.0.so.0
#16 0x00007f556e5ad7e1 in nux::WindowCompositor::RenderTopViews(bool, std::list<nux::ObjectWeakPtr<nux::BaseWindow>, std::allocator<nux::ObjectWeakPtr<nux::BaseWindow> > >&, bool) ()
   from /usr/lib/libnux-3.0.so.0
#17 0x00007f556e5adabd in nux::WindowCompositor::Draw(bool, bool) ()
   from /usr/lib/libnux-3.0.so.0
#18 0x00007f556e5b5281 in nux::WindowThread::RenderInterfaceFromForeignCmd(nux::Rect*) ()
   from /usr/lib/libnux-3.0.so.0
#19 0x00007f556e9beb3e in unity::UnityScreen::paintDisplay() ()
   from /usr/lib/compiz/libunityshell.so
#20 0x00007f556e9bf09b in unity::UnityWindow::glDraw(GLMatrix const&, GLWindowPaintAttrib const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
#21 0x00007f557ede6bd7 in GLWindow::glDraw(GLMatrix const&, GLWindowPaintAttrib const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
#22 0x00007f5577550ce9 in WallWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libwall.so
#23 0x00007f557ede6f6d in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
#24 0x00007f557559564b in FadeWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libfade.so
#25 0x00007f557ede6f6d in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
#26 0x00007f556e9b565b in unity::UnityWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so
#27 0x00007f557ede6f6d in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so
#28 0x00007f557ede7492 in PrivateGLScreen::paintOutputRegion(GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
#29 0x00007f557ede78ab in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
#30 0x00007f557754b45f in WallScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libwall.so
#31 0x00007f557ede77de in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
#32 0x00007f556e9bf3cc in unity::UnityScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) ()
   from /usr/lib/compiz/libunityshell.so
#33 0x00007f557ede77de in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so
#34 0x00007f557eddd97b in PrivateGLScreen::paintOutputs(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int, CompRegion const&) () from /usr/lib/compiz/libopengl.so
#35 0x00007f558441df25 in CompositeScreen::paint(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int) () from /usr/lib/compiz/libcomposite.so
#36 0x00007f558441fa98 in CompositeScreen::handlePaintTimeout() ()
   from /usr/lib/compiz/libcomposite.so
#37 0x00007f558b77251c in CompTimer::triggerCallback() ()
   from /usr/lib/libcompiz_core.so.ABI-20120603
#38 0x00007f558b7725bf in CompTimeoutSource::callback() ()
   from /usr/lib/libcompiz_core.so.ABI-20120603
#39 0x00007f558b771a8d in CompTimeoutSource::dispatch(sigc::slot_base*) ()
   from /usr/lib/libcompiz_core.so.ABI-20120603
#40 0x00007f5589c64acf in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) ()
   from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#41 0x00007f5589769db5 in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#42 0x00007f558976a0e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#43 0x00007f558976a4e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#44 0x000000000040271b in main ()