I get this stack trace #0 xcb_send_request (c=0x0, flags=1, vector=0xbfffe80c, req=0xafb59ee8 <xcb_req>) at xcb_out.c:187 #1 0xafb50603 in xcb_randr_query_version (c=0x0, major_version=1, minor_version=2) at randr.c:212 #2 0xafb0f7c3 in XRandrBrightness::XRandrBrightness() () from /opt/lib/i386-linux-gnu/plugins/kded_powerdevil.so #3 0xafb08425 in PowerDevilUPowerBackend::init() () from /opt/lib/i386-linux-gnu/plugins/kded_powerdevil.so #4 0xafab1073 in PowerDevil::Core::loadCore(PowerDevil::BackendInterface*) () from /opt/lib/i386-linux-gnu/libpowerdevilcore.so.2 #5 0xafafb4cf in KDEDPowerDevil::init() () from /opt/lib/i386-linux-gnu/plugins/kded_powerdevil.so #6 0xafb23b7c in KDEDPowerDevil::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () from /opt/lib/i386-linux-gnu/plugins/kded_powerdevil.so #7 0xb6b854a0 in QMetaCallEvent::placeMetaCall(QObject*) () from /opt/lib/libQt5Core.so.5 #8 0xb6b88bd3 in QObject::event(QEvent*) () from /opt/lib/libQt5Core.so.5 #9 0xb77998fa in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/lib/libQt5Widgets.so.5 #10 0xb779f179 in QApplication::notify(QObject*, QEvent*) () from /opt/lib/libQt5Widgets.so.5 #11 0xb6b569aa in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/lib/libQt5Core.so.5 #12 0xb6b58f0c in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /opt/lib/libQt5Core.so.5 #13 0xb6b59627 in QCoreApplication::sendPostedEvents(QObject*, int) () from /opt/lib/libQt5Core.so.5 #14 0xb6bb1893 in ?? () from /opt/lib/libQt5Core.so.5 #15 0xb5fcfc84 in g_main_dispatch (context=<optimized out>) at gmain.c:3122 #16 g_main_context_dispatch (context=0x0) at gmain.c:3737 #17 0xb5fcffa9 in g_main_context_iterate (context=0xb3c03000, block=0, block@entry=1, dispatch=1, self=<optimized out>) at gmain.c:3808 #18 0xb5fd0076 in g_main_context_iteration (context=0xb3c03000, may_block=1) at gmain.c:3869 #19 0xb6bb1ca4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/lib/libQt5Core.so.5 #20 0xb47baf71 in ?? () from /opt/lib/libQt5WaylandClient.so.5 #21 0xb6b53af3 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/lib/libQt5Core.so.5 #22 0xb6b53f5a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /opt/lib/libQt5Core.so.5 #23 0xb6b5c4f5 in QCoreApplication::exec() () from /opt/lib/libQt5Core.so.5 #24 0xb6fe9c41 in QGuiApplication::exec() () from /opt/lib/libQt5Gui.so.5 #25 0xb7794f64 in QApplication::exec() () from /opt/lib/libQt5Widgets.so.5 #26 0xb7fcacfe in kdemain () from /opt/lib/i386-linux-gnu/libkdeinit5_kded5.so #27 0x08048577 in main () Reproducible: Always
Fixed by http://quickgit.kde.org/?p=powerdevil.git&a=commit&h=bb67165aa5d99e9eeea3c7f8b328b3b53a5e70a5