Bug 279597

Summary: kwin crash when enabling GL desktop effects
Product: [Plasma] kwin Reporter: Adrian Baugh <mail>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED DUPLICATE    
Severity: crash    
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Adrian Baugh 2011-08-07 16:57:42 UTC 
Application: kwin (4.6.2 (4.6.2))
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 3.0.0-0300-generic x86_64
Distribution: Ubuntu 11.04

-- Information about the crash:
- What I was doing when the application crashed:
Ran kwin with desktop effects off, then turned them on. Done from a console - output below:
kwin --replace
OpenGL vendor string:                   Tungsten Graphics, Inc                                                                                                                     
OpenGL renderer string:                 Mesa DRI Intel(R) Sandybridge Desktop                                                                                                      
OpenGL version string:                  1.4 (2.1 Mesa 7.12-devel)                                                                                                                  
Driver:                                 Intel                                                                                                                                      
GPU class:                              i965                                                                                                                                       
OpenGL version:                         1.4                                                                                                                                        
Mesa version:                           7.12                                                                                                                                       
X server version:                       1.10.2                                                                                                                                     
Linux kernel version:                   3.0                                                                                                                                        
Direct rendering:                       no                                                                                                                                         
Requires strict binding:                yes                                                                                                                                        
GLSL shaders:                           no                                                                                                                                         
Texture NPOT support:                   yes                                                                                                                                        
kwin(5745): glCheckFramebufferStatus failed:  "GL_NO_ERROR"                                                                                                                        
Application::crashHandler() called with signal 11; recent crashes: 1                                                                                                               
OpenGL vendor string:                   Tungsten Graphics, Inc                                                                                                                     
OpenGL renderer string:                 Mesa DRI Intel(R) Sandybridge Desktop                                                                                                      
OpenGL version string:                  1.4 (2.1 Mesa 7.12-devel)                                                                                                                  
Driver:                                 Intel                                                                                                                                      
GPU class:                              i965                                                                                                                                       
OpenGL version:                         1.4                                                                                                                                        
Mesa version:                           7.12                                                                                                                                       
X server version:                       1.10.2                                                                                                                                     
Linux kernel version:                   3.0                                                                                                                                        
Direct rendering:                       no                                                                                                                                         
Requires strict binding:                yes                                                                                                                                        
GLSL shaders:                           no                                                                                                                                         
Texture NPOT support:                   yes                                                                                                                                        
KCrash: Application 'kwin' crashing...                                                                                                                                             
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit                                                                                                             
sock_file=/home/adrian/.kde/socket-avalon/kdeinit4__0                                                                                                                              
kwin(5752): glCheckFramebufferStatus failed:  "GL_NO_ERROR"                                                                                                                        
Application::crashHandler() called with signal 11; recent crashes: 2                                                                                                               
KCrash: Application 'kwin' crashing...                                                                                                                                             
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit                                                                                                             
sock_file=/home/adrian/.kde/socket-avalon/kdeinit4__0

The fact that it mentions the Intel driver makes me wonder if this is actually separate from the other possibly related bugs, or if those other ones weren't really due to misconfiguration after all.

-- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  memcpy () at ../sysdeps/x86_64/memcpy.S:267
#7  0x00007f73a054d410 in ?? () from /usr/lib/x86_64-linux-gnu/mesa/libGL.so.1
#8  0x00007f738a6f326a in KWin::ARBBlurShader::init (this=0x13a55c0) at ../../../kwin/effects/blur/blurshader.cpp:473
#9  0x00007f738a6f0072 in KWin::BlurEffect::reconfigure (this=0x13a7b10, flags=<value optimized out>) at ../../../kwin/effects/blur/blur.cpp:76
#10 0x00007f738a6f01d7 in KWin::BlurEffect::BlurEffect (this=0x13a7b10) at ../../../kwin/effects/blur/blur.cpp:48
#11 0x00007f738a6f0286 in KWin::effect_create_kwin4_effect_blur () at ../../../kwin/effects/blur/blur.cpp:29
#12 0x00007f73a30411eb in KWin::EffectsHandlerImpl::loadEffect (this=0x1324490, name=...) at ../../kwin/effects.cpp:1128
#13 0x00007f73a30423d1 in KWin::EffectsHandlerImpl::reconfigure (this=0x1324490) at ../../kwin/effects.cpp:143
#14 0x00007f73a301d04c in KWin::Workspace::setupCompositing (this=0x7f7384008d60) at ../../kwin/composite.cpp:216
#15 0x00007f73a2fa2deb in KWin::Workspace::Workspace (this=0x7f7384008d60, restore=false) at ../../kwin/workspace.cpp:222
#16 0x00007f73a2fba38c in KWin::Application::Application (this=<value optimized out>) at ../../kwin/main.cpp:330
#17 0x00007f73a2fbbe7d in kdemain (argc=<value optimized out>, argv=0x7fff6f99f918) at ../../kwin/main.cpp:516
#18 0x00007f73a2bedeff in __libc_start_main (main=0x400740 <main(int, char**)>, argc=3, ubp_av=0x7fff6f99f918, init=<value optimized out>, fini=<value optimized out>, rtld_fini=<value optimized out>, stack_end=0x7fff6f99f908) at libc-start.c:226
#19 0x0000000000400669 in _start ()

This bug may be a duplicate of or related to bug 270818.

Possible duplicates by query: bug 278741, bug 277528, bug 275325, bug 274090, bug 273694.

Reported using DrKonqi
Comment 1 Adrian Baugh 2011-08-07 17:12:03 UTC 
An addition to the above - given the crash happened in a blur shader I tried switching off the Blur effect (blue background of semitransparent windows) and this works around the problem perfectly. I've quickly tried the other available effects and although there are a couple that flatly refuse to start none of the others cause kwin to crash, so it looks like there is a real bug there.
Comment 2 Thomas Lübking 2011-08-07 17:33:44 UTC 
The blur effect is the only one that calls glGenProgramsARB() which causes all those crashes.
They all (probably, at least all with complete traces) walk through __indirect_glProgramParameters4fvNV and end up in memcpy what's a bit too reproducable to be a general memory corruption in kwin but is rather a mesa issue?!

Ensure to enable direct rendering in "kcmshell4 kwincompositing", "advanced" tab and to NOT have LIBGL_ALWAYS_INDIRECT=1 exported
- The line in the kwin output should say:
Direct rendering:                       yes

*** This bug has been marked as a duplicate of bug 270818 ***