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    <p>Hi,</p>
    <p>i do not know who is the correct person / mailing list, to ask
      for this one.</p>
    <p>1) screen-lock locks the screen  (OK)<br>
    </p>
    <p>2) screensaver comes and screen is going to be black.  (OK)<br>
    </p>
    <p>3) Everytime i unlock my locked screen (after the screensaver
      kicked in) i got this:<b> systemd-coredump</b>   (NOT OK)<br>
    </p>
    <p><br>
    </p>
    <p>What are the next steps to fix this?<br>
    </p>
    <p>regards LF<br>
    </p>
    <p><br>
    </p>
    <p><br>
    </p>
    <p><br>
    </p>
    <p><b>Apr 29 21:08:37  lightdm[2482]: gkr-pam: unable to locate
        daemon control file</b><b><br>
      </b><b>Apr 29 21:08:40  systemd-coredump[2529]: Process 2326
        (xfwm4) of user 1000 dumped core.</b><br>
                                                      <br>
                                                      Stack trace of
      thread 2326:<br>
                                                      #0 
      0x00007f35c1525186 n/a (libglib-2.0.so.0)<br>
                                                      #1 
      0x00007f35c1522f5c g_log_writer_default (libglib-2.0.so.0)<br>
                                                      #2 
      0x00007f35c1519a49 g_log_structured_array (libglib-2.0.so.0)<br>
                                                      #3 
      0x00007f35c1521f0d g_log_structured_standard (libglib-2.0.so.0)<br>
                                                      #4 
      0x00007f35c187e54e n/a (libgdk-3.so.0)<br>
                                                      #5 
      0x00007f35c188b6e5 n/a (libgdk-3.so.0)<br>
                                                      #6 
      0x00007f35c11a652a _XError (libX11.so.6)<br>
                                                      #7 
      0x00007f35c11a33f8 n/a (libX11.so.6)<br>
                                                      #8 
      0x00007f35c11a34a5 n/a (libX11.so.6)<br>
                                                      #9 
      0x00007f35c11a4410 _XReply (libX11.so.6)<br>
                                                      #10
      0x00007f35c2047742 XIQueryDevice (libXi.so.6)<br>
                                                      #11
      0x00007f35c187b1bd n/a (libgdk-3.so.0)<br>
                                                      #12
      0x00007f35c188636d n/a (libgdk-3.so.0)<br>
                                                      #13
      0x00007f35c1885e36 n/a (libgdk-3.so.0)<br>
                                                      #14
      0x00007f35c184eea2 gdk_display_get_event (libgdk-3.so.0)<br>
                                                      #15
      0x00007f35c1885aa4 n/a (libgdk-3.so.0)<br>
                                                      #16
      0x00007f35c152b7bf g_main_context_dispatch (libglib-2.0.so.0)<br>
                                                      #17
      0x00007f35c152d739 n/a (libglib-2.0.so.0)<br>
                                                      #18
      0x00007f35c152e6d2 g_main_loop_run (libglib-2.0.so.0)<br>
                                                      #19
      0x00007f35c1b56e6f gtk_main (libgtk-3.so.0)<br>
                                                      #20
      0x000055dba8e9a765 n/a (xfwm4)<br>
                                                      #21
      0x00007f35c0c55ce3 __libc_start_main (libc.so.6)<br>
                                                      #22
      0x000055dba8e9a95e n/a (xfwm4)<br>
                                                      <br>
                                                      Stack trace of
      thread 2328:<br>
                                                      #0 
      0x00007f35c0d220d1 __poll (libc.so.6)<br>
                                                      #1 
      0x00007f35c152d690 n/a (libglib-2.0.so.0)<br>
                                                      #2 
      0x00007f35c152e6d2 g_main_loop_run (libglib-2.0.so.0)<br>
                                                      #3 
      0x00007f35c0639568 n/a (libgio-2.0.so.0)<br>
                                                      #4 
      0x00007f35c1508c21 n/a (libglib-2.0.so.0)<br>
                                                      #5 
      0x00007f35c0dfea92 start_thread (libpthread.so.0)<br>
                                                      #6 
      0x00007f35c0d2ccd3 __clone (libc.so.6)<br>
                                                      <br>
                                                      Stack trace of
      thread 2339:<br>
                                                      #0 
      0x00007f35c0e04bac <a class="moz-txt-link-abbreviated" href="mailto:pthread_cond_wait@@GLIBC_2.3.2">pthread_cond_wait@@GLIBC_2.3.2</a>
      (libpthread.so.0)<br>
                                                      #1 
      0x00007f35bc8411e4 n/a (nouveau_dri.so)<br>
                                                      #2 
      0x00007f35bc840f08 n/a (nouveau_dri.so)<br>
                                                      #3 
      0x00007f35c0dfea92 start_thread (libpthread.so.0)<br>
                                                      #4 
      0x00007f35c0d2ccd3 __clone (libc.so.6)<br>
                                                      <br>
                                                      Stack trace of
      thread 2327:<br>
                                                      #0 
      0x00007f35c0d220d1 __poll (libc.so.6)<br>
                                                      #1 
      0x00007f35c152d690 n/a (libglib-2.0.so.0)<br>
                                                      #2 
      0x00007f35c152d77e g_main_context_iteration (libglib-2.0.so.0)<br>
                                                      #3 
      0x00007f35c152d7d2 n/a (libglib-2.0.so.0)<br>
                                                      #4 
      0x00007f35c1508c21 n/a (libglib-2.0.so.0)<br>
                                                      #5 
      0x00007f35c0dfea92 start_thread (libpthread.so.0)<br>
                                                      #6 
      0x00007f35c0d2ccd3 __clone (libc.so.6)<br>
      -- Subject: Speicherabbild für Prozess 2326 (@COREDUMP_COMM)
      generiert<br>
      -- Defined-By: systemd<br>
      -- Support:
      <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/systemd-devel">https://lists.freedesktop.org/mailman/listinfo/systemd-devel</a><br>
      -- Documentation: <a class="moz-txt-link-freetext" href="man:core(5)">man:core(5)</a><br>
      -- <br>
      -- Prozess 2326 (xfwm4) ist abgebrochen worden und<br>
      -- ein Speicherabbild wurde generiert.<br>
      -- <br>
      -- Üblicherweise ist dies ein Hinweis auf einen Programmfehler und
      sollte<br>
      -- als Fehler dem jeweiligen Hersteller gemeldet werden.<br>
      <br>
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