Comment 11 for bug 1385816

Here is my backtrace (but I think it won't help):

#0 0x00007ffff5c0139d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007ffff4887ee4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007ffff4888272 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007ffff55f3747 in gtk_main ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#4 0x00007ffff6e2b9a5 in wxGUIEventLoop::DoRun() ()
   from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#5 0x00007ffff67aa380 in wxEventLoopBase::Run() ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#6 0x00007ffff6eaabe0 in wxDialog::ShowModal() ()
   from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#7 0x00007fffce9ef535 in SCH_BASE_FRAME::SelectComponentFromLibrary(wxString const&, wxArrayString&, int&, bool, int*, int*) ()
   from /usr/local/bin/_eeschema.kiface
#8 0x00007fffce9effed in SCH_EDIT_FRAME::Load_Component(wxDC*, wxString const&, wxArrayString&, int&, bool) () from /usr/local/bin/_eeschema.kiface
#9 0x00007fffcea67cc8 in SCH_EDIT_FRAME::OnLeftClick(wxDC*, wxPoint const&) ()
   from /usr/local/bin/_eeschema.kiface
#10 0x00007fffceb7e661 in EDA_DRAW_PANEL::OnMouseEvent(wxMouseEvent&) ()
   from /usr/local/bin/_eeschema.kiface
#11 0x00007ffff67668be in wxAppConsoleBase::CallEventHandler(wxEvtHandler*, wxEventFunctor&, wxEvent&) const ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#12 0x00007ffff68f8368 in wxEvtHandler::ProcessEventIfMatchesId(wxEventTableEntryBase const&, wxEvtHandler*, wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#13 0x00007ffff68f846b in wxEventHashTable::HandleEvent(wxEvent&, wxEvtHandler*) () from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#14 0x00007ffff68f8818 in wxEvtHandler::TryHereOnly(wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#15 0x00007ffff68f88a3 in wxEvtHandler::ProcessEventLocally(wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#16 0x00007ffff68f8905 in wxEvtHandler::ProcessEvent(wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#17 0x00007ffff70b2a8b in wxScrollHelperEvtHandler::ProcessEvent(wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#18 0x00007ffff68f8677 in wxEvtHandler::SafelyProcessEvent(wxEvent&) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#19 0x00007ffff6e56f4d in ?? ()
   from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#20 0x00007ffff55f5c0f in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#21 0x00007ffff4fcc245 in g_closure_invoke ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#22 0x00007ffff4fddf3c in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#23 0x00007ffff4fe6255 in g_signal_emit_valist ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#24 0x00007ffff4fe69af in g_signal_emit ()
   from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#25 0x00007ffff570d2fc in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#26 0x00007ffff55f4354 in gtk_propagate_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#27 0x00007ffff55f47eb in gtk_main_do_event ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#28 0x00007ffff526876c in ?? ()
   from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0
#29 0x00007ffff4887c5d in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x00007ffff4887f48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#31 0x00007ffff4888272 in g_main_loop_run ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007ffff55f3747 in gtk_main ()
   from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
#33 0x00007ffff6e2b9a5 in wxGUIEventLoop::DoRun() ()
   from /usr/lib/x86_64-linux-gnu/libwx_gtk2u_core-3.0.so.0
#34 0x00007ffff67aa380 in wxEventLoopBase::Run() ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#35 0x00007ffff6768ab6 in wxAppConsoleBase::MainLoop() ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#36 0x000000000043a539 in ?? ()
#37 0x00007ffff67ff61d in wxEntry(int&, wchar_t**) ()
   from /usr/lib/x86_64-linux-gnu/libwx_baseu-3.0.so.0
#38 0x000000000041d78e in ?? ()
#39 0x00007ffff5b32ec5 in __libc_start_main (main=0x41d760, argc=1,
    argv=0x7fffffffdf18, init=<optimized out>, fini=<optimized out>,
    rtld_fini=<optimized out>, stack_end=0x7fffffffdf08) at libc-start.c:287
#40 0x0000000000421497 in _start ()

I don't know what exactly you mean by window focus issue, but I can't switch to the missing window (also tried Alt+Tab). Also switching to another wm won't make the window appear. On the other hand, if you open the dialog in another wm it will also show up in unity after you switched back to unity.