Comment 7 for bug 1272438

I keep running into this every time I switch away from X. Here's a stack trace with Qt debug symbols, in KDE 4.13.3:

#0 0x00007f7514c4f8e3 in select () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f750f0401c7 in qt_safe_select (nfds=23, fdread=0xcf7f88, fdwrite=0xcf8220,
    fdexcept=0xcf84b8, orig_timeout=0x7fff4a848190) at kernel/qcore_unix.cpp:89
#2 0x00007f750f045824 in QEventDispatcherUNIXPrivate::doSelect (this=this@entry=0xcf7dd0,
    flags=..., timeout=0x7fff4a848190) at kernel/qeventdispatcher_unix.cpp:223
#3 0x00007f750f045c92 in QEventDispatcherUNIX::processEvents (this=this@entry=0xc98af0,
    flags=...) at kernel/qeventdispatcher_unix.cpp:936
#4 0x00007f750e4514d6 in QEventDispatcherX11::processEvents (this=0xc98af0, flags=...)
    at kernel/qeventdispatcher_x11.cpp:152
#5 0x00007f750f0140af in QEventLoop::processEvents (this=this@entry=0x7fff4a848460,
    flags=...) at kernel/qeventloop.cpp:149
#6 0x00007f750f0143a5 in QEventLoop::exec (this=this@entry=0x7fff4a848460, flags=...)
    at kernel/qeventloop.cpp:204
#7 0x00007f750f019b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1225
#8 0x00007f750e3ad37c in QApplication::exec () at kernel/qapplication.cpp:3828
#9 0x00007f7514f9e9d6 in kdemain (argc=3, argv=0x7fff4a848738) at ../../kwin/main.cpp:597
#10 0x00007f7514b7eec5 in __libc_start_main (main=0x4006d0 <main(int, char**)>, argc=3,
    argv=0x7fff4a848738, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fff4a848728) at libc-start.c:287
#11 0x00000000004006fe in _start ()