. Thread 4 (Thread 0x7fe80a1ff700 (LWP 8500)): #0 0x00007fe8153519e3 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fe813bb4084 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fe813bb44e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fe80b958f56 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007fe813bd7115 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fe815055e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007fe81535d39d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 3 (Thread 0x7fe811b80700 (LWP 8497)): #0 0x00007fe8153519e3 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fe813bb4084 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fe813bb41a4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fe813bb41f1 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #4 0x00007fe813bd7115 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fe815055e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007fe81535d39d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 2 (Thread 0x7fe80aa00700 (LWP 8499)): #0 0x00007fe8153519e3 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fe813bb4084 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007fe813bb41a4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007fe80b24335d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so No symbol table info available. #4 0x00007fe813bd7115 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007fe815055e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007fe81535d39d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7fe815ff1780 (LWP 8496)): #0 0x00007fe8152a1405 in raise () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fe8152a4b6b in abort () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #2 0x00007fe81529a0ce in ?? () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #3 0x00007fe81529a172 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #4 0x00007fe80843475b in intel_resolve_map_set () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so No symbol table info available. #5 0x00007fe808445e81 in brw_draw_prims () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so No symbol table info available. #6 0x00007fe803ba743f in vbo_exec_vtx_flush () from /usr/lib/x86_64-linux-gnu/libdricore8.1.0.so.1 No symbol table info available. #7 0x00007fe803b9c30f in ?? () from /usr/lib/x86_64-linux-gnu/libdricore8.1.0.so.1 No symbol table info available. #8 0x00007fe803ba4eb6 in vbo_exec_FlushVertices () from /usr/lib/x86_64-linux-gnu/libdricore8.1.0.so.1 No symbol table info available. #9 0x00007fe803b6b0c6 in _mesa_BindTexture () from /usr/lib/x86_64-linux-gnu/libdricore8.1.0.so.1 No symbol table info available. #10 0x00007fe80919e022 in GLTexture::disable() () from /usr/lib/compiz/libopengl.so No symbol table info available. #11 0x00007fe7f89f34ee in unity::UnityScreen::paintPanelShadow(GLMatrix const&) () from /usr/lib/compiz/libunityshell.so No symbol table info available. #12 0x00007fe7f89ff7d9 in unity::UnityWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so No symbol table info available. #13 0x00007fe8091b7d1a in GLWindow::glDraw(GLMatrix const&, GLFragment::Attrib&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #14 0x00007fe8091b80b2 in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #15 0x00007fe800409aa9 in WallWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libwall.so No symbol table info available. #16 0x00007fe8091b80e8 in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #17 0x00007fe7f973d69b in FadeWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libfade.so No symbol table info available. #18 0x00007fe8091b80e8 in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #19 0x00007fe7f89f534b in unity::UnityWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libunityshell.so No symbol table info available. #20 0x00007fe8091b80e8 in GLWindow::glPaint(GLWindowPaintAttrib const&, GLMatrix const&, CompRegion const&, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #21 0x00007fe8091b8662 in PrivateGLScreen::paintOutputRegion(GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #22 0x00007fe8091b8a57 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #23 0x00007fe80040420f in WallScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libwall.so No symbol table info available. #24 0x00007fe8091b8995 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #25 0x00007fe7f89ff9e4 in unity::UnityScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libunityshell.so No symbol table info available. #26 0x00007fe8091b8995 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libopengl.so No symbol table info available. #27 0x00007fe8091b07ca in PrivateGLScreen::paintOutputs(std::list >&, unsigned int, CompRegion const&) () from /usr/lib/compiz/libopengl.so No symbol table info available. #28 0x00007fe8097e5f25 in CompositeScreen::paint(std::list >&, unsigned int) () from /usr/lib/compiz/libcomposite.so No symbol table info available. #29 0x00007fe8097e7a98 in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so No symbol table info available. #30 0x00007fe815bbc51c in CompTimer::triggerCallback() () from /usr/lib/libcompiz_core.so.ABI-20120603 No symbol table info available. #31 0x00007fe815bbc5bf in CompTimeoutSource::callback() () from /usr/lib/libcompiz_core.so.ABI-20120603 No symbol table info available. #32 0x00007fe815bbba8d in CompTimeoutSource::dispatch(sigc::slot_base*) () from /usr/lib/libcompiz_core.so.ABI-20120603 No symbol table info available. #33 0x00007fe8140aeacf in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1 No symbol table info available. #34 0x00007fe813bb3db5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #35 0x00007fe813bb40e8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #36 0x00007fe813bb44e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #37 0x000000000040270b in main () No symbol table info available.