This is the upstream report for http://bugs.kde.org/284633 . Using webkit as the rendering engine for Konqueror stresses Xorg and the CPU. An example link is: http://forum.softpedia.com/index.php?showforum=197 . Tested with Qt 4.8, flash plugin 11.1.102.55, 64 bit. What I found: - it doesn't happen with an adblocker - it doesn't happen with privoxy (that also filters out flash ads) - it doesn't happen with export QT_NO_GLIB=1 The backtrace while this happens looks like this: Program received signal SIGINT, Interrupt. 0x00007ffff4439dcd in read () from /lib64/libpthread.so.0 (gdb) bt #0 0x00007ffff4439dcd in read () from /lib64/libpthread.so.0 #1 0x00007fffed1176ad in ?? () from /usr/lib64/libxcb.so.1 #2 0x00007fffed115cf2 in ?? () from /usr/lib64/libxcb.so.1 #3 0x00007fffed11723f in xcb_wait_for_reply () from /usr/lib64/libxcb.so.1 #4 0x00007ffff2a1d0bd in _XReply () from /usr/lib64/libX11.so.6 #5 0x00007ffff2a002f0 in XGetGeometry () from /usr/lib64/libX11.so.6 #6 0x00007fff9795b591 in ?? () from /usr/lib64/libgdk-x11-2.0.so.0 #7 0x00007fff979312a4 in gdk_window_get_geometry () from /usr/lib64/libgdk-x11-2.0.so.0 #8 0x00007fff97929b40 in gdk_screen_get_monitor_at_window () from /usr/lib64/libgdk-x11-2.0.so.0 #9 0x00007fffdf4ac948 in ?? () from /usr/lib64/browser-plugins/libflashplayer.so #10 0x00007fffdf4c4373 in ?? () from /usr/lib64/browser-plugins/libflashplayer.so #11 0x00007fffdf4aeb22 in ?? () from /usr/lib64/browser-plugins/libflashplayer.so #12 0x00007fffdf4aef74 in ?? () from /usr/lib64/browser-plugins/libflashplayer.so #13 0x00007fff97ce1958 in ?? () from /usr/lib64/libgtk-x11-2.0.so.0 #14 0x00007fffed773a14 in g_closure_invoke () from /usr/lib64/libgobject-2.0.so.0 #15 0x00007fffed78599a in ?? () from /usr/lib64/libgobject-2.0.so.0 #16 0x00007fffed78edf3 in g_signal_emit_valist () from /usr/lib64/libgobject-2.0.so.0 #17 0x00007fffed78f1c2 in g_signal_emit () from /usr/lib64/libgobject-2.0.so.0 #18 0x00007fff97dfa7c0 in ?? () from /usr/lib64/libgtk-x11-2.0.so.0 #19 0x00007fff97ce0137 in gtk_main_do_event () from /usr/lib64/libgtk-x11-2.0.so.0 #20 0x00007fff97932cc4 in ?? () from /usr/lib64/libgdk-x11-2.0.so.0 #21 0x00007fff9792dc63 in ?? () from /usr/lib64/libgdk-x11-2.0.so.0 #22 0x00007fff9792fe01 in gdk_window_process_all_updates () from /usr/lib64/libgdk-x11-2.0.so.0 #23 0x00007fff97c63281 in ?? () from /usr/lib64/libgtk-x11-2.0.so.0 #24 0x00007fff9790d346 in ?? () from /usr/lib64/libgdk-x11-2.0.so.0 #25 0x00007fffedeb158d in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #26 0x00007fffedeb1d88 in ?? () from /usr/lib64/libglib-2.0.so.0 #27 0x00007fffedeb1f59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0 #28 0x00007ffff4860d85 in QEventDispatcherGlib::processEvents (this=0x60d640, flags=...) at kernel/qeventdispatcher_glib.cpp:424 #29 0x00007ffff348f46e in QGuiEventDispatcherGlib::processEvents (this=0x60d640, flags=...) at kernel/qguieventdispatcher_glib.cpp:204 #30 0x00007ffff4821a2a in QEventLoop::processEvents (this=0x7fffffffd0a0, flags=...) at kernel/qeventloop.cpp:149 #31 0x00007ffff4821bb4 in QEventLoop::exec (this=0x7fffffffd0a0, flags=...) at kernel/qeventloop.cpp:204 #32 0x00007ffff4824846 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148 #33 0x00007ffff33b3252 in QApplication::exec () at kernel/qapplication.cpp:3811 #34 0x00007ffff7bab5b2 in kdemain (argc=<optimized out>, argv=<optimized out>) at /encrypted/home/andris/development/sources/kde-trunk/kde-baseapps/konqueror/src/konqmain.cpp:227
Same happens with fabcybrowser example if I enable the plugins.
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