Bug 313911 - Kwin crash
Summary: Kwin crash
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: scene-opengl (show other bugs)
Version: unspecified
Platform: Ubuntu Linux
: NOR crash (vote)
Target Milestone: 4.10
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2013-01-26 01:32 UTC by Cristian M. Barbe
Modified: 2013-02-04 06:34 UTC (History)
0 users

See Also:
Latest Commit: http://commits.kde.org/kde-workspace/77f388ba468f88c54a51f2a1407799a6f5c69cca
Version Fixed In: 4.10
thomas.luebking: ReviewRequest+

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Description Cristian M. Barbe 2013-01-26 01:32:59 UTC 
Application: kwin (4.9.98)
KDE Platform Version: 4.9.98
Qt Version: 4.8.3
Operating System: Linux 3.5.0-23-generic i686
Distribution: Ubuntu 12.10

-- Information about the crash:
- What I was doing when the application crashed:
Update Kubuntu and restart... after on desktop this crash!

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#7  0xb6814aed in XFreeGC () from /usr/lib/i386-linux-gnu/libX11.so.6
#8  0xb76ecb23 in KWin::GlxBackend::~GlxBackend (this=0x8fb9c18, __in_chrg=<optimized out>) at ../../kwin/glxbackend.cpp:63
#9  0xb76ecb82 in KWin::GlxBackend::~GlxBackend (this=0x8fb9c18, __in_chrg=<optimized out>) at ../../kwin/glxbackend.cpp:67
#10 0xb76e3ab5 in KWin::SceneOpenGL::createScene () at ../../kwin/scene_opengl.cpp:267
#11 0xb76d0145 in KWin::Compositor::slotCompositingOptionsInitialized (this=0x8f6e980) at ../../kwin/composite.cpp:206
#12 0xb764c4d8 in qt_static_metacall (_a=0xbf8beefc, _id=14, _o=0x8f6e980, _c=<optimized out>) at moc_composite.cpp:113
#13 KWin::Compositor::qt_static_metacall (_o=0x8f6e980, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf8beefc) at moc_composite.cpp:93
#14 0xb5f15ed6 in QMetaObject::activate (sender=0x8f7e900, m=0xb6061800 <QFutureWatcherBase::staticMetaObject>, local_signal_index=1, argv=0x0) at kernel/qobject.cpp:3547
#15 0xb5f62e95 in QFutureWatcherBase::finished (this=0x8f7e900) at .moc/release-shared/moc_qfuturewatcher.cpp:141
#16 0xb5dd9c0c in QFutureWatcherBasePrivate::sendCallOutEvent (this=this@entry=0x8f7e918, event=event@entry=0xae1011f8) at concurrent/qfuturewatcher.cpp:439
#17 0xb5dd9f12 in QFutureWatcherBase::event (this=0x8f7e900, event=0xae1011f8) at concurrent/qfuturewatcher.cpp:344
#18 0xb53ee39c in QApplicationPrivate::notify_helper (this=0x8e65990, receiver=0x8f7e900, e=0xae1011f8) at kernel/qapplication.cpp:4562
#19 0xb53f2daf in QApplication::notify (this=0xae1011f8, receiver=0x8f7e900, e=0xae1011f8) at kernel/qapplication.cpp:3944
#20 0xb7209321 in KApplication::notify (this=0xbf8bf778, receiver=0x8f7e900, event=0xae1011f8) at ../../kdeui/kernel/kapplication.cpp:311
#21 0xb7678aff in notify (e=0xae1011f8, o=0x8f7e900, this=0xbf8bf778) at ../../kwin/main.cpp:371
#22 KWin::Application::notify (this=0xbf8bf778, o=0x8f7e900, e=0xae1011f8) at ../../kwin/main.cpp:367
#23 0xb5efd78e in QCoreApplication::notifyInternal (this=0xbf8bf778, receiver=0x8f7e900, event=0xae1011f8) at kernel/qcoreapplication.cpp:915
#24 0xb5f0197d in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8e27130) at kernel/qcoreapplication.cpp:1539
#26 0xb5f01c0c in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1432
#27 0xb54a582d in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#28 QEventDispatcherX11::processEvents (this=0x8e27eb8, flags=...) at kernel/qeventdispatcher_x11.cpp:75
#29 0xb5efc26c in QEventLoop::processEvents (this=this@entry=0xbf8bf5f8, flags=...) at kernel/qeventloop.cpp:149
#30 0xb5efc561 in QEventLoop::exec (this=0xbf8bf5f8, flags=...) at kernel/qeventloop.cpp:204
#31 0xb5f01cba in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#32 0xb53ebfc4 in QApplication::exec () at kernel/qapplication.cpp:3823
#33 0xb767b581 in kdemain (argc=3, argv=0xbf8bf864) at ../../kwin/main.cpp:537
#34 0x0804855b in main (argc=3, argv=0xbf8bf864) at kwin_dummy.cpp:3

Reported using DrKonqi
Comment 1 Martin Flöser 2013-01-26 09:14:20 UTC 
This is an interesting crash. I think you hit a code path which has never been tested:
XFreeGC(display(), gcroot);

Please provide as much information about your GPU and used driver as possible. Output of glxinfo would be very useful at least.
Comment 2 Thomas Lübking 2013-01-26 10:37:11 UTC 
Bug is trivial - gcroot (and buffer) are not initialized, backend init fails before they're created and the destructor tries to free them nevertheless.

But the GL setup must be fundamentally garbled (to get here) - i bet on insufficient GLX version.

@Cristian:
when you start "kwin --replace" from konsole, there should be some output about why setting up the GL backend fails - nevertheless please provide information about your GPU and installation (drivers)

I'm not sure glxinfo will do anything but crash as well :-\
Comment 3 Cristian M. Barbe 2013-01-26 18:30:32 UTC 
English:

I will try to explain in detail what I did.

I opened the update manager and frame me that there was a linux kernel update, I had installed the Catalyst 13.1 drivers my video graphics AMD HD 6850.

When you restart and had no 3D acceleration, then the error appeared in kde ... I'm sure that the module was not updated when the new kernel is installed, reinstall my video driver, restart and everything worked again as before.

Excuse my English, I speak Spanish.






Spanish:

Intentaré explicar detalladamente lo que hice.

Abrí el gestor de actualizaciones y me marco que existía una actualización de núcleo linux, tenia instalados los controladores 13.1 de mi gráfica de vídeo AMD HD 6850.

Cuando reinicie ya no tenia aceleración 3D, entonces el error en kde apareció... estoy seguro que el modulo no se actualizo cuando el nuevo núcleo se instalo, instale de nuevo el controlador de mi vídeo, reinicie y todo volvió a funcionar como antes.

Disculpen mi ingles, hablo español.
Comment 4 Cristian M. Barbe 2013-01-26 18:34:25 UTC 
Glxinfo but with acceleration 3D on catalyst 13.1


steelr@steelr-desktop:~$ glxinfo
name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: ATI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, 
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGIS_multisample, 
    GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group
client glx vendor string: ATI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
    GLX_EXT_swap_control, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_MESA_allocate_memory, GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control, 
    GLX_MESA_swap_frame_usage, GLX_NV_swap_group, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_swap_barrier, GLX_SGIX_swap_group, GLX_SGIX_visual_select_group, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB, 
    GLX_ARB_fbconfig_float, GLX_AMD_gpu_association
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
    GLX_EXT_swap_control, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_MESA_swap_control, GLX_NV_swap_group, GLX_OML_swap_method, 
    GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_swap_barrier, GLX_SGIX_swap_group, GLX_SGIX_visual_select_group, 
    GLX_EXT_texture_from_pixmap
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 6800 Series  
OpenGL version string: 4.2.12002 Compatibility Profile Context 9.012
OpenGL shading language version string: 4.20
OpenGL extensions:
    GL_AMDX_debug_output, GL_AMDX_vertex_shader_tessellator, 
    GL_AMD_conservative_depth, GL_AMD_debug_output,                                                                                        
    GL_AMD_depth_clamp_separate, GL_AMD_draw_buffers_blend,                                                                                
    GL_AMD_multi_draw_indirect, GL_AMD_name_gen_delete,                                                                                    
    GL_AMD_performance_monitor, GL_AMD_pinned_memory,                                                                                      
    GL_AMD_query_buffer_object, GL_AMD_sample_positions,                                                                                   
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,                                                                     
    GL_AMD_shader_trace, GL_AMD_texture_cube_map_array,                                                                                    
    GL_AMD_texture_texture4, GL_AMD_transform_feedback3_lines_triangles,                                                                   
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_tessellator,                                                                          
    GL_AMD_vertex_shader_viewport_index, GL_ARB_ES2_compatibility,                                                                         
    GL_ARB_base_instance, GL_ARB_blend_func_extended,                                                                                      
    GL_ARB_color_buffer_float, GL_ARB_compressed_texture_pixel_storage,                                                                    
    GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_depth_buffer_float,                                                              
    GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_draw_buffers, 
    GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex, 
    GL_ARB_draw_indirect, GL_ARB_draw_instanced, 
    GL_ARB_explicit_attrib_location, GL_ARB_fragment_coord_conventions, 
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow, 
    GL_ARB_fragment_shader, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, 
    GL_ARB_get_program_binary, GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, 
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, GL_ARB_imaging, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multisample, 
    GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2, 
    GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, 
    GL_ARB_provoking_vertex, GL_ARB_sample_shading, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_separate_shader_objects, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding, 
    GL_ARB_shader_image_load_store, GL_ARB_shader_objects, 
    GL_ARB_shader_precision, GL_ARB_shader_stencil_export, 
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod, 
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack, 
    GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_shadow_ambient, 
    GL_ARB_sync, GL_ARB_tessellation_shader, GL_ARB_texture_border_clamp, 
    GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32, 
    GL_ARB_texture_buffer_range, GL_ARB_texture_compression, 
    GL_ARB_texture_compression_bptc, GL_ARB_texture_compression_rgtc, 
    GL_ARB_texture_cube_map, GL_ARB_texture_cube_map_array, 
    GL_ARB_texture_env_add, GL_ARB_texture_env_combine, 
    GL_ARB_texture_env_crossbar, GL_ARB_texture_env_dot3, 
    GL_ARB_texture_float, GL_ARB_texture_gather, 
    GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample, 
    GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_lod, 
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, 
    GL_ARB_texture_snorm, GL_ARB_texture_storage, 
    GL_ARB_texture_storage_multisample, GL_ARB_timer_query, 
    GL_ARB_transform_feedback2, GL_ARB_transform_feedback3, 
    GL_ARB_transform_feedback_instanced, GL_ARB_transpose_matrix, 
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, 
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_64bit, 
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array, 
    GL_ARB_window_pos, GL_ATI_draw_buffers, GL_ATI_envmap_bumpmap, 
    GL_ATI_fragment_shader, GL_ATI_meminfo, GL_ATI_separate_stencil, 
    GL_ATI_texture_compression_3dc, GL_ATI_texture_env_combine3, 
    GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_EXT_abgr, 
    GL_EXT_bgra, GL_EXT_bindable_uniform, GL_EXT_blend_color, 
    GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, 
    GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, 
    GL_EXT_copy_buffer, GL_EXT_copy_texture, GL_EXT_direct_state_access, 
    GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, 
    GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample, 
    GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, 
    GL_EXT_geometry_shader4, GL_EXT_gpu_program_parameters, 
    GL_EXT_gpu_shader4, GL_EXT_histogram, GL_EXT_multi_draw_arrays, 
    GL_EXT_packed_depth_stencil, GL_EXT_packed_float, GL_EXT_packed_pixels, 
    GL_EXT_pixel_buffer_object, GL_EXT_point_parameters, 
    GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_store, 
    GL_EXT_shadow_funcs, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
    GL_EXT_texgen_reflection, GL_EXT_texture3D, GL_EXT_texture_array, 
    GL_EXT_texture_buffer_object, GL_EXT_texture_compression_bptc, 
    GL_EXT_texture_compression_latc, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, 
    GL_EXT_texture_edge_clamp, GL_EXT_texture_env_add, 
    GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, 
    GL_EXT_texture_lod, GL_EXT_texture_lod_bias, GL_EXT_texture_mirror_clamp, 
    GL_EXT_texture_object, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, 
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent, 
    GL_EXT_texture_snorm, GL_EXT_texture_storage, GL_EXT_texture_swizzle, 
    GL_EXT_timer_query, GL_EXT_transform_feedback, GL_EXT_vertex_array, 
    GL_EXT_vertex_array_bgra, GL_EXT_vertex_attrib_64bit, 
    GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square, 
    GL_NV_conditional_render, GL_NV_copy_depth_to_color, GL_NV_copy_image, 
    GL_NV_explicit_multisample, GL_NV_float_buffer, GL_NV_half_float, 
    GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_SGIS_generate_mipmap, GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, 
    GL_SUN_multi_draw_arrays, GL_WIN_swap_hint

81 GLX Visuals
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  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x023 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x024 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x025 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x026 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x027 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x028 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x029 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x02a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x02b 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x02c 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x02d 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x02e 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x02f 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x030 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x031 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x032 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x033 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x034 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x035 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x036 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x037 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x038 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x039 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x03a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x03b 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x03c 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x03d 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x03e 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x03f 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x040 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x041 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x042 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x043 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x044 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x045 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x046 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x047 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x048 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x049 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x04a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x04b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x04c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x04d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x04e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x04f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x050 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x051 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x052 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x053 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x054 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x055 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x056 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x057 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x058 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x059 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x05a 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x05b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x05c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x05d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x05e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x05f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x060 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x061 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x062 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x063 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x064 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x065 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x066 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x067 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x068 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x069 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x06a 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x06b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x06c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x06d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x06e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x06f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x070 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x071 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x072 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x0bf 32 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 Ncon

91 GLXFBConfigs:
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x023 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x024 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x025 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x026 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x027 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x028 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x029 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x02a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x02b 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x02c 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x02d 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x02e 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x02f 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x030 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x031 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x032 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x033 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x034 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x035 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x036 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x037 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x038 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x039 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x03a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x03b 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x03c 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x03d 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x03e 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x03f 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x040 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x041 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x042 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x043 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x044 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x045 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x046 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x047 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x048 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x049 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x04a 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x04b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x04c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x04d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x04e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x04f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x050 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x051 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x052 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 None
0x053 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x054 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x055 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x056 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x057 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x058 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  2 1 None
0x059 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x05a 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  2 1 None
0x05b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x05c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x05d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x05e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x05f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x060 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  4 1 None
0x061 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x062 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 None
0x063 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x064 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x065 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x066 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x067 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x068 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  6 1 None
0x069 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x06a 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  6 1 None
0x06b 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x06c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x06d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x06e 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0 16 16 16 16  0 0 None
0x06f 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x070 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  8 1 None
0x071 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x072 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  8 1 None
0x0bf 32 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  0  0  0  0  0  4 1 Ncon
0x0bf 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  0  0  0  0  0  0 0 Ncon
0x0bf 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 Ncon
0x0bf 32 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 Ncon
0x0bf 32 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 Ncon
0x0bf  0 tc  0 128  0    y .  32 32 32 32 .  .  0 24  0  0  0  0  0  0 0 None
0x0bf  0 tc  0 128  0    . .  32 32 32 32 .  .  0 24  0  0  0  0  0  0 0 None
0x0bf  0 tc  0  64  0    y .  16 16 16 16 .  .  0 24  0  0  0  0  0  0 0 None
0x0bf  0 tc  0  64  0    . .  16 16 16 16 .  .  0 24  0  0  0  0  0  0 0 None
0x0bf  0 tc  0  32  0    y .  11 11 10  0 .  .  0 24  0  0  0  0  0  0 0 None
0x0bf  0 tc  0  32  0    . .  11 11 10  0 .  .  0 24  0  0  0  0  0  0 0 None
Comment 5 Thomas Lübking 2013-01-26 18:56:53 UTC 
Your english is fine and the description explains why you ran into the condition that exposed this bug.
Thanks alot.

Bug in kwin nevertheless.
http://git.reviewboard.kde.org/r/108604/
Comment 6 Thomas Lübking 2013-01-30 12:28:51 UTC 
Git commit f638fab62571dde1d34e8160b16c874cc2ac4298 by Thomas Lübking.
Committed on 26/01/2013 at 16:05.
Pushed by luebking into branch 'KDE/4.10'.

Initialize some variables and check on destruction
REVIEW: 108604
FIXED-IN: 4.10

M  +17   -6    kwin/glxbackend.cpp

http://commits.kde.org/kde-workspace/f638fab62571dde1d34e8160b16c874cc2ac4298
Comment 7 Thomas Lübking 2013-01-30 12:29:32 UTC 
Git commit 77f388ba468f88c54a51f2a1407799a6f5c69cca by Thomas Lübking.
Committed on 26/01/2013 at 16:05.
Pushed by luebking into branch 'master'.

Initialize some variables and check on destruction
REVIEW: 108604

M  +17   -6    kwin/glxbackend.cpp

http://commits.kde.org/kde-workspace/77f388ba468f88c54a51f2a1407799a6f5c69cca