[Pkg-owncloud-maintainers] Bug#946405: nextcloud-desktop: Nextcloud desktop client crash when trying to enter login/password

[Bernhard Übelacker]

Hello Ludovic,
I tried to collect some more information from your crash dump.
With debug symbols this backtrace should look like below.

I guess you are running a nvidia graphics card
with the nouveau drivers?

As a workaround it may work if you start the client
from a terminal by following:

    export LIBGL_ALWAYS_SOFTWARE=1
    nextcloud

Or maybe this:

    export QT_XCB_FORCE_SOFTWARE_OPENGL=1
    nextcloud


Maybe you can confirm my findings, and forward the output of
following commands to this bug:

    lspci | grep VGA
    glxinfo | grep -i -E "GLX_MESA_query_renderer.:" -A5


Kind regards,
Bernhard



          From submitter                                  |            Reconstructed
 #0  0x7fe16d9b6bde <unknown>                             | 0x00007f1811853bde <base::debug::StackTrace::StackTrace(unsigned long)+25>
 #1  0x7fe16d9b6cf0 <unknown>                             | 0x00007f1811853cf0 <base::debug::(anonymous namespace)::StackDumpSignalHandler(int, siginfo_t*, void*) [clone .part.77]+219>
 #2  0x7fe16d9b7327 <unknown>                             | 0x00007f1811854327 <base::debug::(anonymous namespace)::StackDumpSignalHandler(int, siginfo_t*, void*)+130>
 #3  0x7fe166ea4840 <unknown>                             | 0x00007f180ad41840 <__restore_rt+0>: mov    $0xf,%rax
 #4  0x7fe152142a8c <unknown>                             | 0x00007f17f754ca8c in list_del at ../src/util/list.h:91
 #5  0x7fe152142c87 <unknown>                             | 0x00007f17f754cc87 in nouveau_fence_update at ../src/gallium/drivers/nouveau/nouveau_fence.c:128
 #6  0x7fe152142f83 <unknown>                             | 0x00007f17f754cf83 in nouveau_fence_wait at ../src/gallium/drivers/nouveau/nouveau_fence.c:219
 #7  0x7fe1523cf490 <unknown>                             | 0x00007f17f77d9490 in st_finish (st=st at entry=0x562393326c90) at ../src/mesa/state_tracker/st_cb_flush.c:69
 #8  0x7fe1523cf4e0 <unknown>                             | 0x00007f17f77d94e0 in st_glFinish (ctx=<optimized out>) at ../src/mesa/state_tracker/st_cb_flush.c:104
 #9  0x7fe166a5f156 <unknown>                             | 0x00007f180a8fc156 in QQuickWidgetPrivate::render (this=0x562392ccb0b0, needsSync=<optimized out>) at qquickwidget.cpp:295
 #10 0x7fe166a5f2b6 <unknown>                             | 0x00007f180a8fc2b6 in QQuickWidgetPrivate::renderSceneGraph (this=0x562392ccb0b0) at qquickwidget.cpp:339
 #11 0x7fe1675e509b QObject::event()                      | 0x00007f180b48209b in QObject::event (this=this at entry=0x5623930a2130, e=e at entry=0x7ffcf1848bb0) at kernel/qobject.cpp:1232
 #12 0x7fe167f7496b QWidget::event()                      | 0x00007f180be1196b in QWidget::event (this=this at entry=0x5623930a2130, event=event at entry=0x7ffcf1848bb0) at kernel/qwidget.cpp:9353
 #13 0x7fe166a62e5d QQuickWidget::event()                 | 0x00007f180a8ffe5d in QQuickWidget::event (this=0x5623930a2130, e=0x7ffcf1848bb0) at qquickwidget.cpp:1525
 #14 0x7fe17207cb50 <unknown>                             | 0x00007f1815f19b50 in QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5WebEngineWidgets.so.5
 #15 0x7fe167f364c1 QApplicationPrivate::notify_helper()  | 0x00007f180bdd34c1 in QApplicationPrivate::notify_helper (this=this at entry=0x562392919dd0, receiver=receiver at entry=0x5623930a2130, e=e at entry=0x7ffcf1848bb0) at kernel/qapplication.cpp:3726
 #16 0x7fe167f3d970 QApplication::notify()                | 0x00007f180bdda970 in QApplication::notify (this=0x7ffcf1848ef0, receiver=0x5623930a2130, e=0x7ffcf1848bb0) at kernel/qapplication.cpp:3485
 #17 0x7fe1675bb4f9 QCoreApplication::notifyInternal2()   | 0x00007f180b4584f9 in QCoreApplication::notifyInternal2 (receiver=0x5623930a2130, event=event at entry=0x7ffcf1848bb0) at ../../include/QtCore/5.11.3/QtCore/private/../../../../../src/corelib/thread/qthread_p.h:307
                                                          | 0x00007f180b4a8ba8 in QCoreApplication::sendEvent (event=0x7ffcf1848bb0, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
                                                          | 0x00007f180b4a8ba8 in QTimerInfoList::activateTimers (this=0x562392954560) at kernel/qtimerinfo_unix.cpp:643
                                                          | 0x00007f180b4a943c in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
                                                          | 0x00007f180b4a943c in idleTimerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:229
 #18 0x7fe16760bba8 QTimerInfoList::activateTimers()      | 0x00007f180b4a8ba8 in QTimerInfoList::activateTimers (this=0x562392954560) at kernel/qtimerinfo_unix.cpp:643
 #19 0x7fe16760c404 <unknown>                             | 0x00007f180b4a9404 in timerSourceDispatch (source=<optimized out>) at kernel/qeventdispatcher_glib.cpp:182
 #20 0x7fe166ab9f2e g_main_context_dispatch               | 0x00007f180a956f2e in g_main_dispatch (context=0x7f17f8004ff0) at ../../../glib/gmain.c:3182
                                                          | 0x00007f180a956f2e in g_main_context_dispatch (context=context at entry=0x7f17f8004ff0) at ../../../glib/gmain.c:3847
 #21 0x7fe166aba1c8 <unknown>                             | 0x00007f180a9571c8 in g_main_context_iterate (context=context at entry=0x7f17f8004ff0, block=block at entry=1, dispatch=dispatch at entry=1, self=<optimized out>) at ../../../glib/gmain.c:3920
 #22 0x7fe166aba25c g_main_context_iteration              | 0x00007f180a95725c in g_main_context_iteration (context=0x7f17f8004ff0, may_block=may_block at entry=1) at ../../../glib/gmain.c:3981
 #23 0x7fe16760c797 QEventDispatcherGlib::processEvents() | 0x00007f180b4a9797 in QEventDispatcherGlib::processEvents (this=0x562392925510, flags=...) at kernel/qeventdispatcher_glib.cpp:422
 #24 0x7fe15a477401 <unknown>                             | 0x00007f17fe277401 in QPAEventDispatcherGlib::processEvents (this=0x562392925510, flags=...) at qeventdispatcher_glib.cpp:69
 #25 0x7fe1675ba1cb QEventLoop::exec()                    | 0x00007f180b4571cb in QEventLoop::exec (this=this at entry=0x7ffcf1848e30, flags=..., flags at entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:140
 #26 0x7fe1675c21a2 QCoreApplication::exec()              | 0x00007f180b45f1a2 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:120
 #27 0x55a62d7e01ac main                                  | 0x0000562391ca01ac in main (argc=<optimized out>, argc at entry=1, argv=argv at entry=0x7ffcf18490d8) at ./src/gui/main.cpp:167
 #28 0x7fe166e9109b __libc_start_main                     | 0x00007f180ad2e09b in __libc_start_main (main=0x562391c9ff50 <main>, argc=1, argv=0x7ffcf18490d8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcf18490c8) at ../csu/libc-start.c:308
 #29 0x55a62d7e066a _start                                | 0x0000562391ca066a in _start () at ./src/gui/main.cpp:162