Description of problem: The screen was locked by timeout and I try to unlock it... if it matters the external monitor was in power save mode, before moving the mouse. Version-Release number of selected component: kscreenlocker-5.5.1-1.fc23 Additional info: reporter: libreport-2.6.3 backtrace_rating: 4 cmdline: /usr/libexec/kscreenlocker_greet --graceTime 5000 --ksldfd 44 crash_function: KCrash::defaultCrashHandler executable: /usr/libexec/kscreenlocker_greet global_pid: 26139 kernel: 4.2.8-300.fc23.x86_64 runlevel: N 5 type: CCpp uid: 1000 Truncated backtrace: Thread no. 1 (10 frames) #1 KCrash::defaultCrashHandler at ../../src/kcrash.cpp:431 #3 brw_meta_fast_clear at brw_meta_fast_clear.c:573 #4 brw_clear at brw_clear.c:245 #5 QSGBatchRenderer::Renderer::renderBatches at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:2478 #6 QSGBatchRenderer::Renderer::render at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/coreapi/qsgbatchrenderer.cpp:2681 #7 QSGRenderer::renderScene at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/coreapi/qsgrenderer.cpp:208 #9 QSGRenderContext::renderNextFrame at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/qsgcontext.cpp:558 #10 QQuickWindowPrivate::renderSceneGraph at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/items/qquickwindow.cpp:383 #11 QSGGuiThreadRenderLoop::renderWindow at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/qsgrenderloop.cpp:378 #12 QSGGuiThreadRenderLoop::event at /usr/src/debug/qtdeclarative-opensource-src-5.5.1/src/quick/scenegraph/qsgrenderloop.cpp:474
Created attachment 1112523 [details] File: backtrace
Created attachment 1112524 [details] File: cgroup
Created attachment 1112525 [details] File: core_backtrace
Created attachment 1112526 [details] File: dso_list
Created attachment 1112527 [details] File: environ
Created attachment 1112528 [details] File: limits
Created attachment 1112529 [details] File: maps
Created attachment 1112530 [details] File: mountinfo
Created attachment 1112531 [details] File: namespaces
Created attachment 1112532 [details] File: open_fds
Created attachment 1112533 [details] File: proc_pid_status
Created attachment 1112534 [details] File: var_log_messages
intel driver issue, I'd encourage you to test if this xorg-x11-drv-intel update helps: https://bodhi.fedoraproject.org/updates/FEDORA-2016-606ca05253
*** This bug has been marked as a duplicate of bug 1259443 ***