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    #1

    KWin crashes using OpenGL w/kernel 3.13.0-20

    On my HP 64-bit install.

    Up till yesterday, I was using OpenGL 2.0 as the compositing type. Now KWin crashes if I try to use any of the listed OpenGL versions. Given I was able to use OpenGL and now I can't, what's the likely cause?

    Code:
    paul@tanagra:~$ inxi -G
Graphics:  Card: Intel Core Processor Integrated Graphics Controller
           Display Server: X.Org 1.15.0 drivers: intel (unloaded: fbdev,vesa) Resolution: 1600x900@60.1hz
           GLX Renderer: Mesa DRI Intel Ironlake Mobile GLX Version: 2.1 Mesa 10.1.0
    Code:
    paul@tanagra:~$ glxinfo | grep Open
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile 
OpenGL version string: 2.1 Mesa 10.1.0
OpenGL shading language version string: 1.20
OpenGL extensions:
paul@tanagra:~$
    Code:
    paul@tanagra:~$ glxinfo
name of display: :0
display: :0  screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, 
    GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, 
    GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig, 
    GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_swap_control
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_fbconfig_packed_float, 
    GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, 
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, 
    GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile, 
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, 
    GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, 
    GLX_EXT_create_context_es2_profile, GLX_EXT_framebuffer_sRGB, 
    GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, 
    GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, 
    GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile 
OpenGL version string: 2.1 Mesa 10.1.0
OpenGL shading language version string: 1.20
OpenGL extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_performance_monitor, 
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_trinary_minmax, 
    GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, 
    GL_APPLE_object_purgeable, GL_APPLE_packed_pixels, 
    GL_APPLE_vertex_array_object, GL_ARB_ES2_compatibility, 
    GL_ARB_clear_buffer_object, GL_ARB_color_buffer_float, GL_ARB_copy_buffer, 
    GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, 
    GL_ARB_depth_texture, GL_ARB_draw_buffers, 
    GL_ARB_draw_elements_base_vertex, 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_get_program_binary, 
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, 
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query, 
    GL_ARB_invalidate_subdata, 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_robustness, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_shader_bit_encoding, 
    GL_ARB_shader_objects, GL_ARB_shader_texture_lod, 
    GL_ARB_shading_language_100, GL_ARB_shadow, GL_ARB_sync, 
    GL_ARB_texture_border_clamp, GL_ARB_texture_compression, 
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map, 
    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_mirror_clamp_to_edge, 
    GL_ARB_texture_mirrored_repeat, 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_storage, GL_ARB_texture_swizzle, 
    GL_ARB_transpose_matrix, GL_ARB_vertex_array_bgra, 
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_binding, 
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, 
    GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_window_pos, 
    GL_ATI_blend_equation_separate, GL_ATI_draw_buffers, 
    GL_ATI_envmap_bumpmap, GL_ATI_separate_stencil, 
    GL_ATI_texture_env_combine3, GL_ATI_texture_float, GL_EXT_abgr, 
    GL_EXT_bgra, 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_texture, GL_EXT_draw_buffers2, 
    GL_EXT_draw_instanced, GL_EXT_draw_range_elements, GL_EXT_fog_coord, 
    GL_EXT_framebuffer_blit, GL_EXT_framebuffer_object, 
    GL_EXT_framebuffer_sRGB, GL_EXT_gpu_program_parameters, 
    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_polygon_offset, GL_EXT_provoking_vertex, 
    GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_separate_shader_objects, GL_EXT_separate_specular_color, 
    GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, 
    GL_EXT_subtexture, GL_EXT_texture, GL_EXT_texture3D, 
    GL_EXT_texture_array, GL_EXT_texture_compression_dxt1, 
    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_bias, 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_swizzle, GL_EXT_timer_query, GL_EXT_vertex_array, 
    GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays, 
    GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, 
    GL_INGR_blend_func_separate, GL_KHR_debug, GL_MESA_pack_invert, 
    GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_MESA_ycbcr_texture, 
    GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp, 
    GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, 
    GL_NV_primitive_restart, GL_NV_texgen_reflection, 
    GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_OES_EGL_image, 
    GL_OES_read_format, GL_S3_s3tc, GL_SGIS_generate_mipmap, 
    GL_SGIS_texture_border_clamp, GL_SGIS_texture_edge_clamp, 
    GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays

12 GLX Visuals
    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
----------------------------------------------------------------------------
0x020 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x021 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x076 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x077 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x078 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x079 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x07a 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x07b 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x07c 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x07d 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x07e 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x05d 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None

24 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
----------------------------------------------------------------------------
0x05e  0 tc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x05f  0 tc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x060  0 tc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x061  0 tc  0  16  0 r  . .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x062 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x063 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x064 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x065 24 tc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x066  0 tc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x067  0 tc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0 16 16 16  0  0 0 Slow
0x068 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x069 24 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
0x06a  0 dc  0  16  0 r  y .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x06b  0 dc  0  16  0 r  . .   5  6  5  0 .  .  0  0  0  0  0  0  0  0 0 None
0x06c  0 dc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x06d  0 dc  0  16  0 r  . .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x06e 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x06f 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0  0  0  0  0  0  0  0 0 None
0x070 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x071 24 dc  0  32  0 r  . .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x072  0 dc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0  0  0  0  0  0 0 None
0x073  0 dc  0  16  0 r  y .   5  6  5  0 .  .  0 16  0 16 16 16  0  0 0 Slow
0x074 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8  0  0  0  0  0 0 None
0x075 24 dc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 Slow
    Last edited by Snowhog; Mar 29, 2014, 09:59 PM.
    Windows no longer obstructs my view.
    Using Kubuntu Linux since March 23, 2007.
    "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
    Tags: None
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    #2
    I don't have my Intel-based hardware with me right now, so I can't attempt to recreate.

    Obvious first question: what changed between yesterday and now?
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    Comment

      #3
      Here's my apt-get log entries from the 27th through today:
      Code:
      2014-03-27
(dist-upgrade)
The following NEW packages will be installed:
  libgstreamer-plugins-base1.0-0:i386 libgstreamer1.0-0:i386
The following packages will be upgraded:
  cups-browsed cups-driver-gutenprint cups-filters cups-filters-core-drivers gconf-service gconf-service-backend gconf2 gconf2-common gir1.2-glib-2.0 glib-networking glib-networking:i386
  glib-networking-common glib-networking-services hplip hplip-data ibus-gtk:i386 kde-runtime kde-runtime-data kdebase-runtime khelpcenter4 language-selector-common libcupsfilters1
  libcupsfilters1:i386 libepub0 libffi6 libffi6:i386 libfontembed1 libgconf-2-4 libgconf-2-4:i386 libgconf2-4 libgirepository-1.0-1 libgupnp-1.0-4 libgutenprint2 libharfbuzz-icu0
  libharfbuzz0b libharfbuzz0b:i386 libhpmud0 libibus-1.0-5 libibus-1.0-5:i386 libperl5.18 libqtwebkit4 libqtwebkit4:i386 libsane-hpaio perl perl-base perl-modules
  plasma-scriptengine-javascript printer-driver-gutenprint printer-driver-hpcups printer-driver-hpijs printer-driver-postscript-hp
51 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.

2014-03-28
(dist-upgrade)
The following NEW packages will be installed:
  linux-headers-3.13.0-20 linux-headers-3.13.0-20-generic linux-image-3.13.0-20-generic linux-image-extra-3.13.0-20-generic
The following packages will be upgraded:
  apparmor apparmor-easyprof bash calligra-data calligra-libs dconf-gsettings-backend dconf-service dh-apparmor freespacenotifier kde-style-oxygen kde-window-manager
  kde-window-manager-common kde-workspace kde-workspace-bin kde-workspace-data kde-workspace-kgreet-plugins kdm kerneloops-daemon kexi klipper kmenuedit krita krita-data ksysguard
  ksysguardd libapparmor-perl libapparmor1 libdconf1 libffi6 libffi6:i386 libglib2.0-0 libglib2.0-0:i386 libglib2.0-bin libglib2.0-data libkdecorations4abi1 libkephal4abi1
  libkscreensaver5 libksgrd4 libksignalplotter4 libkwineffects1abi4 libkwinglesutils1 libkwinglutils1abi3 libkworkspace4abi2 liboath0 libplasma-geolocation-interface4 libplasmaclock4abi4
  libplasmagenericshell4 libprocesscore4abi1 libprocessui4a libreadline6 libreadline6:i386 libtaskmanager4abi5 libweather-ion6 linux-generic linux-headers-generic linux-image-generic
  linux-libc-dev plasma-dataengines-workspace plasma-desktop plasma-netbook plasma-scriptengine-python plasma-widgets-workspace python3-apparmor python3-distupgrade python3-libapparmor
  python3-update-manager readline-common systemsettings ubuntu-release-upgrader-core ubuntu-release-upgrader-qt update-manager-core
71 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
(install -f)
The following extra packages will be installed:
  krita
The following packages will be upgraded:
  krita
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

2014-03-29
(dist-upgrade)
The following packages will be upgraded:
  akonadi-backend-mysql akonadi-server calligra-data calligra-libs freespacenotifier im-config kde-style-oxygen kde-window-manager kde-window-manager-common kde-workspace
  kde-workspace-bin kde-workspace-data kde-workspace-kgreet-plugins kdm kexi klipper kmenuedit krita krita-data ksysguard ksysguardd libakonadiprotocolinternals1 libkdecorations4abi1
  libkephal4abi1 libkscreensaver5 libksgrd4 libksignalplotter4 libkwineffects1abi4 libkwinglesutils1 libkwinglutils1abi3 libkworkspace4abi2 libplasma-geolocation-interface4
  libplasmaclock4abi4 libplasmagenericshell4 libprocesscore4abi1 libprocessui4a libtaskmanager4abi5 libweather-ion6 plasma-dataengines-workspace plasma-desktop plasma-netbook
  plasma-scriptengine-python plasma-widgets-workspace systemsettings
44 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
(install --no-install-recommends)
The following NEW packages will be installed:
  kinfocenter libqtruby4shared2 libruby1.8 libsmokebase3 libsmokekdecore4-3 libsmokekdeui4-3 libsmokekfile3 libsmokekhtml3 libsmokekio3 libsmokeknewstuff2-3 libsmokeknewstuff3-3
  libsmokekparts3 libsmokektexteditor3 libsmokekutils3 libsmokenepomuk3 libsmokeplasma3 libsmokeqtcore4-3 libsmokeqtdbus4-3 libsmokeqtgui4-3 libsmokeqtnetwork4-3 libsmokeqtopengl4-3
  libsmokeqtsql4-3 libsmokeqtsvg4-3 libsmokeqtwebkit4-3 libsmokeqtxml4-3 libsmokesolid3 plasma-scriptengine-ruby plasma-scriptengine-webkit plasma-scriptengines ruby-kde4 ruby-plasma
  ruby-qt4 ruby-qt4-webkit
0 upgraded, 33 newly installed, 0 to remove and 0 not upgraded.
(install --no-install-recommends)
The following NEW packages will be installed:
  libglamor0 libspice-server1 libxatracker2 xserver-xorg-video-all xserver-xorg-video-ati xserver-xorg-video-cirrus xserver-xorg-video-glamoregl xserver-xorg-video-mach64
  xserver-xorg-video-mga xserver-xorg-video-neomagic xserver-xorg-video-nouveau xserver-xorg-video-openchrome xserver-xorg-video-qxl xserver-xorg-video-r128 xserver-xorg-video-radeon
  xserver-xorg-video-s3 xserver-xorg-video-savage xserver-xorg-video-siliconmotion xserver-xorg-video-sis xserver-xorg-video-sisusb xserver-xorg-video-tdfx xserver-xorg-video-trident
  xserver-xorg-video-vmware
0 upgraded, 23 newly installed, 0 to remove and 0 not upgraded.
(install --reinstall --no-install-recommends)
The following NEW packages will be installed:
  kubuntu-desktop liblightdm-gobject-1-0 liblightdm-qt-3-0 libxklavier16 lightdm lightdm-kde-greeter
0 upgraded, 6 newly installed, 0 to remove and 0 not upgraded.
      Windows no longer obstructs my view.
      Using Kubuntu Linux since March 23, 2007.
      "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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      Comment

        #4
        Well, your batch of updates on the 29th doesn't include a newer Intel driver for X, so it appears we can rule that out. KWin and some of its GL-related libraries were updated. I wonder if this is at least a contributor to your problem. The problem may work itself out in a day or two, assuming that the bugs are temporary. Or you might try some surgical downgrades of various kwin-* or libkwingl* packages.
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        Comment

          #5
          Yeah, I figure that because OpenGL had worked, that a later upgrade of package-x (or packages-x) will get it working again. For now, XRender is what I have to use. I loose only a few desktop effects, but the most important effect -- window transparency -- works with XRender.

          What I find interesting, is that OpenGL does work on my 32-bit install of 14.04. Both laptops have Intel Integrated Graphics, but on the 32-bit, I have a Display Controller in addition to the VGA compatible controller. On the 64-biit install, I don't have a Display Controller.
          Windows no longer obstructs my view.
          Using Kubuntu Linux since March 23, 2007.
          "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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          Comment

            #6
            Originally posted by Snowhog View Post
            What I find interesting, is that OpenGL does work on my 32-bit install of 14.04. Both laptops have Intel Integrated Graphics, but on the 32-bit, I have a Display Controller in addition to the VGA compatible controller. On the 64-biit install, I don't have a Display Controller.
            Can you elaborate on this -- what are "Display Controller" and "VGA compatible controller"?
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            Comment

              #7
              I had this problem yesterday and after trying various things found that it was the new kernel causing the crashes. Going back to 3.13.0-19 makes it work.
              Relevant bug https://bugs.launchpad.net/ubuntu/+s...e/+bug/1299499
              Last edited by SteveRiley; Mar 29, 2014, 09:11 PM. Reason: Removed spaces from URL.
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              Comment

                #8
                Wow, that's interesting. One commenter in the bug indicated that reverting to 3.13.0-19 didn't fix the problem.

                Paul: which kernel do you have now?
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                Comment

                  #9
                  Running 3.13.0-20-generic on both laptops.
                  Windows no longer obstructs my view.
                  Using Kubuntu Linux since March 23, 2007.
                  "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                  Comment

                    #10
                    Well, the next obvious test: does reverting to 3.13.0-19 fix the problem on your machine?
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                    Comment

                      #11
                      Originally posted by SteveRiley View Post
                      Wow, that's interesting. One commenter in the bug indicated that reverting to 3.13.0-19 didn't fix the problem.
                      The process I used (if I remember correctly), after booting into 3.13.0-19 open system settings - desktop effects.
                      Click the box for "Enable desktop effects at startup" and Apply. I then had an error message about several effects can't be loaded, I just dismissed that then used the shortcut ALT+SHIFT+F12 and it turned on and has been working since.
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                        #12
                        Originally posted by SteveRiley View Post
                        Well, the next obvious test: does reverting to 3.13.0-19 fix the problem on your machine?
                        Why, yes, it does! Cool.
                        Windows no longer obstructs my view.
                        Using Kubuntu Linux since March 23, 2007.
                        "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                          #13
                          Originally posted by Snowhog View Post
                          Why, yes, it does! Cool.
                          Excellent. Probably a good thing to upvote the bug, too
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                            #14
                            Made my commentary to the bug.
                            Windows no longer obstructs my view.
                            Using Kubuntu Linux since March 23, 2007.
                            "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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                              #15
                              I created a bug report running ubuntu-bug kernel from the console. That bug was just confirmed.

                              See Bug #1301570 OpenGL crashes KWin with 3.13.0-21 kernel
                              Windows no longer obstructs my view.
                              Using Kubuntu Linux since March 23, 2007.
                              "It is a capital mistake to theorize before one has data." - Sherlock Holmes​
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