Kwin crashes with current mesa and kernel 3.8. It does not crash with 3.7 kernel. With mesa 9.0.2 and kernel 3.8 kwin also works fine #5 0x0000003647c892ab in __memset_sse2 () from /lib64/libc.so.6 #6 0x00007f5a8cbf6cf3 in r600_texture_create_object (screen=0x980ca0, base=0x7fff208b4770, pitch_in_bytes_override=0, buf=0x0, surface=0x7fff208b3a80) at r600_texture.c:509 #7 0x00007f5a8cbf7339 in r600_texture_create (screen=0x980ca0, templ=0x7fff208b4770) at r600_texture.c:601 #8 0x00007f5a8cbdbae5 in r600_resource_create (screen=0x980ca0, templ=0x7fff208b4770) at r600_resource.c:37 #9 0x00007f5a8cc1b4d2 in dri2_drawable_process_buffers (drawable=0xc2b130, buffers=0x764460, buffer_count=1, atts=0x7fff208b48b0, att_count=1) at dri2.c:254 #10 0x00007f5a8cc1b9b3 in dri2_allocate_textures (drawable=0xc2b130, statts=0x7fff208b48b0, statts_count=1) at dri2.c:404 #11 0x00007f5a8cc19f0f in dri_st_framebuffer_validate (stfbi=0xc2b130, statts=0x7fff208b48b0, count=1, out=0x0) at dri_drawable.c:81 #12 0x00007f5a8cc1a30e in dri_drawable_validate_att (drawable=0xc2b130, statt=ST_ATTACHMENT_FRONT_LEFT) at dri_drawable.c:206 #13 0x00007f5a8cc1a35c in dri_set_tex_buffer2 (pDRICtx=0x8fef20, target=3553, format=8409, dPriv=0xbee5e0) at dri_drawable.c:220 #14 0x00007f5a9b82f590 in dri2_bind_tex_image (dpy=0x7d15f0, drawable=29360171, buffer=8414, attrib_list=0x0) at dri2_glx.c:1002 #15 0x00007f5a9b7f30f5 in __glXBindTexImageEXT (dpy=0x7d15f0, drawable=29360171, buffer=8414, attrib_list=0x0) at glxcmds.c:2370 #16 0x00007f5a9d1773c3 in KWin::GlxTexture::loadTexture(unsigned long const&, QSize const&, int) () from /usr/lib64/libkdeinit4_kwin.so #17 0x00007f5a9d16f175 in KWin::SceneOpenGL::Window::bindTexture() () from /usr/lib64/libkdeinit4_kwin.so #18 0x00007f5a9d175a8e in KWin::SceneOpenGL::Window::performPaint(int, QRegion, KWin::WindowPaintData) () from /usr/lib64/libkdeinit4_kwin.so #19 0x00007f5a9d16e32f in KWin::SceneOpenGL2::performPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #20 0x00007f5a9d16e4cd in KWin::SceneOpenGL2::finalDrawWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #21 0x00007f5a9d1822b5 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #22 0x00007f5a9d16178a in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #23 0x00007f5a9d182557 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #24 0x00007f5a9d16434d in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () from /usr/lib64/libkdeinit4_kwin.so #25 0x00007f5a9d16367f in KWin::Scene::paintSimpleScreen(int, QRegion) () from /usr/lib64/libkdeinit4_kwin.so #26 0x00007f5a9d1616ce in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #27 0x00007f5a9d182720 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkdeinit4_kwin.so #28 0x00007f5a9d162a68 in KWin::Scene::paintScreen(int*, QRegion*) () from /usr/lib64/libkdeinit4_kwin.so #29 0x00007f5a9d171fce in KWin::SceneOpenGL::paint(QRegion, QList) () from /usr/lib64/libkdeinit4_kwin.so #30 0x00007f5a9d15ceac in KWin::Compositor::performCompositing() () from /usr/lib64/libkdeinit4_kwin.so #31 0x00007f5a9d15d950 in KWin::Compositor::slotCompositingOptionsInitialized() () from /usr/lib64/libkdeinit4_kwin.so #32 0x00007f5a9afb418f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/qt4/libQtCore.so.4 #33 0x00007f5a9ae96877 in QFutureWatcherBase::event(QEvent*) () from /usr/lib64/qt4/libQtCore.so.4 #34 0x00007f5a9a35cd6c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4 #35 0x00007f5a9a35eaea in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/qt4/libQtGui.so.4 #36 0x00007f5a9cc83336 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5 #37 0x00007f5a9af9f06e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/qt4/libQtCore.so.4 #38 0x00007f5a9afa2891 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/qt4/libQtCore.so.4 #39 0x00007f5a9a3f8979 in QEventDispatcherX11::processEvents(QFlags) () from /usr/lib64/qt4/libQtGui.so.4 #40 0x00007f5a9af9ddcf in QEventLoop::processEvents(QFlags) () from /usr/lib64/qt4/libQtCore.so.4 #41 0x00007f5a9af9e058 in QEventLoop::exec(QFlags) () from /usr/lib64/qt4/libQtCore.so.4 #42 0x00007f5a9afa2ba8 in QCoreApplication::exec() () from /usr/lib64/qt4/libQtCore.so.4 #43 0x00007f5a9d113d2a in kdemain () from /usr/lib64/libkdeinit4_kwin.so #44 0x0000003647c249b5 in __libc_start_main () from /lib64/libc.so.6 #45 0x0000000000400831 in _start () Hardware: Mobility Radeon HD 5850