Falkon 3.0.1 crashing at startup after upgrading to kde 5.13 error exit: Failed to load python support plugin "Can not load library /usr/lib/qt/plugins/falkon/PyFalkon.so: (libshiboken2.cpython-36m-x86_64-linux-gnu.so.5.11: Can not open shared object file: File or directory not found) " Falkon: 3 extensions loaded double free or corruption (fasttop) Received signal 6 Received signal 11 SEGV_MAPERR 010000000000 # 0 0x7f30a370ed8e # 0 0x7f30a370ed8e <unknown> # 1 0x7f30a370eea0 Aborted (recorded core image) I already searched https://bugs.kde.org/ and found nothing about it. Can someone help me?
Another error output: Failed to load python support plugin "Cannot load library /usr/lib/qt/plugins/falkon/PyFalkon.so: (libpyside2.cpython-36m-x86_64-linux-gnu.so.5.11: cannot open shared object file: Arquivo ou diretório não encontrado)" Falkon: 3 extensions loaded nouveau: kernel rejected pushbuf: Arquivo ou diretório não encontrado nouveau: ch25: krec 0 pushes 0 bufs 2 relocs 0 nouveau: ch25: buf 00000000 00000002 00000004 00000004 00000000 nouveau: ch25: buf 00000001 00000006 00000004 00000000 00000004 falkon: ../libdrm-2.4.92/nouveau/pushbuf.c:723: nouveau_pushbuf_data: Assertion `kref' failed. Received signal 6 #0 0x7f5d5175dd8e <unknown> #1 0x7f5d5175dea0 <unknown> #2 0x7f5d5175e4d7 <unknown> #3 0x7f5d574fc8f0 <unknown> #4 0x7f5d574fc86b __GI_raise #5 0x7f5d574e740e __GI_abort #6 0x7f5d574e72e0 __assert_fail_base.cold.0 #7 0x7f5d574f5112 __GI___assert_fail #8 0x7f5d25659600 nouveau_pushbuf_data #9 0x7f5d25659563 nouveau_pushbuf_data #10 0x7f5d25659698 <unknown> #11 0x7f5d2565a2af <unknown> #12 0x7f5d2565b2d0 nouveau_pushbuf_kick #13 0x7f5d2a371d4c <unknown> #14 0x7f5d2a4f8690 <unknown> #15 0x7f5d2a07d327 <unknown> #16 0x7f5d2ba47d1a <unknown> #17 0x7f5d377fb569 <unknown> #18 0x7f5d4e84f6f0 QOpenGLContext::swapBuffers() #19 0x7f5d4eae6848 QPlatformBackingStore::composeAndFlush() #20 0x7f5d3a541da6 <unknown> #21 0x7f5d5846e2f1 <unknown> #22 0x7f5d5846fe0b <unknown> #23 0x7f5d58471168 <unknown> #24 0x7f5d58471309 <unknown> #25 0x7f5d58488a57 QWidgetPrivate::syncBackingStore() #26 0x7f5d584a1199 QWidget::event() #27 0x7f5d585b98b5 QMainWindow::event() #28 0x7f5d58461984 QApplicationPrivate::notify_helper() #29 0x7f5d5846925b QApplication::notify() #30 0x7f5d57e7cbc9 QCoreApplication::notifyInternal2() #31 0x7f5d57e7fc5c QCoreApplicationPrivate::sendPostedEvents() #32 0x7f5d57ed0864 <unknown> #33 0x7f5d4caf1368 g_main_context_dispatch #34 0x7f5d4caf15b1 <unknown> #35 0x7f5d4caf163e g_main_context_iteration #36 0x7f5d57ecfe49 QEventDispatcherGlib::processEvents() #37 0x7f5d3a5b0b32 <unknown> #38 0x7f5d57e7b85c QEventLoop::exec() #39 0x7f5d57e83b56 QCoreApplication::exec() #40 0x558b919bbf21 <unknown> #41 0x7f5d574e906b __libc_start_main #42 0x558b919bc23a _start r8: 0000000000000000 r9: 00007ffd64643960 r10: 0000000000000008 r11: 0000000000000246 r12: 00007f5d2565c640 r13: 00007f5d2565c7b1 r14: 00000000000002d3 r15: 0000000000000000 di: 0000000000000002 si: 00007ffd64643960 bp: 00007f5d57647e38 bx: 0000000000000006 dx: 0000000000000000 ax: 0000000000000000 cx: 00007f5d574fc86b sp: 00007ffd64643960 ip: 00007f5d574fc86b efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000 trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000 [end of stack trace] Calling _exit(1). Core file will not be generated.
I downgraded qt5-webengine to version 5.11.0-2 and solved the problem. However, I encountered a similar error (at https://github.com/ColinDuquesnoy/MellowPlayer/issues/252), but pointing to the noveau drive. However, it also has some relation to qt5-webengine, since the downgrade momentarily resolved the issue.
The problem was in the OpenGL acceleration of the qt5-webengine that does not work well under the nouveau drive. The workaround is to run the QT_XCB_FORCE_SOFTWARE_OPENGL = 1 workaround until qt5-webengine's OpenGL is disabled by the maintainer. Or commit the sin of installing the nvidia owner drive.