Application: kwin (4.8.5 (4.8.5)) KDE Platform Version: 4.8.5 (4.8.5) Qt Version: 4.8.1 Operating System: Linux 3.2.0-31-generic i686 Distribution: Ubuntu 12.04.1 LTS -- Information about the crash: - What I was doing when the application crashed: Running Ubuntu 12.04 LTS, (upgraded from 10.10->...->...->12.04) , didn't care for Unity, installed KDE, rebooted, logged in (xubuntu screen) logged out relogged in to KDE for first time, Kwin crashed. Perhaps a one off. -- Backtrace: Application: KWin (kwin), signal: Segmentation fault Using host libthread_db library "/lib/i386-linux-gnu/libthread_db.so.1". [KCrash Handler] #7 nouveau_flush (ctx=0x904a470) at nouveau_driver.c:70 #8 nouveau_flush (ctx=0x904a470) at nouveau_driver.c:57 #9 0x052414d0 in _mesa_flush (ctx=0x904a470) at main/context.c:1652 #10 0x05241572 in _mesa_make_current (newCtx=0x0, drawBuffer=0x0, readBuffer=0x0) at main/context.c:1431 #11 0x053c7a34 in _mesa_meta_free (ctx=0x904a470) at drivers/common/meta.c:417 #12 0x04ed902c in nouveau_context_deinit (ctx=0x904a470) at nouveau_context.c:171 #13 0x04eedb48 in nv20_context_destroy (ctx=0x904a470) at nv20_context.c:427 #14 0x04ed9088 in nouveau_context_destroy (dri_ctx=0x903f610) at nouveau_context.c:187 #15 0x04ed593a in driDestroyContext (pcp=0x903f610) at ../common/dri_util.c:277 #16 0x008b139a in dri2_destroy_context (context=0x900dae0) at dri2_glx.c:132 #17 0x00887da2 in glXDestroyContext (ctx=0x900dae0, dpy=0x8f3de90) at glxcmds.c:424 #18 glXDestroyContext (dpy=0x8f3de90, ctx=0x900dae0) at glxcmds.c:405 #19 0x00504826 in KWin::CompositingPrefs::deleteGLXContext (this=0xbf8bfb88) at ../../kwin/compositingprefs.cpp:282 #20 0x00505234 in KWin::CompositingPrefs::detect (this=0xbf8bfb88) at ../../kwin/compositingprefs.cpp:223 #21 0x0047f020 in KWin::Options::reloadCompositingSettings (this=0x900cdc8, force=false) at ../../kwin/options.cpp:313 #22 0x004842ea in KWin::Options::updateSettings (this=0x900cdc8) at ../../kwin/options.cpp:256 #23 0x0047c00e in KWin::Application::Application (this=0xbf8c08d8) at ../../kwin/main.cpp:319 #24 0x0047e3ae in kdemain (argc=1, argv=0xbf8c0b84) at ../../kwin/main.cpp:511 #25 0x0804850b in main (argc=1, argv=0xbf8c0b84) at kwin_dummy.cpp:3 Reported using DrKonqi
Crashes unfortunately in the nouveau driver, that is out of our control. To circumvent this problem there are multiple solutions: 1. Use the proprietary NVIDIA driver 2. Update to 4.9 (provided through a PPA) which does no longer use this specific code path where the crash occurred, though it is still very likely that the nouveau driver would cause a crash.
Can't use NVIDIA proprietary driver, old card using 96.x.x.x, now no longer supported for the latest Xorg. Guess I can try 4.9; can we pass this bug along to the nouveau team?
The trace has all required debug symbols, fdo bugtracker with nouveau bugs: https://bugs.freedesktop.org/buglist.cgi?quicksearch=xf86-video-nouveau You can and should file the bug, but the OpenGL drivers are far from productive state and NV20 is not exactly a common chip nowadays. You may have more success using XRender compositing ("kcmshell4 kwincompositing", last tab)
*** Bug 308780 has been marked as a duplicate of this bug. ***
*** Bug 309328 has been marked as a duplicate of this bug. ***
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*** Bug 313528 has been marked as a duplicate of this bug. ***