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    Hi Matthew,<br>
    <br>
    <br>
    this is exactly the question, I asked a few days before ;) It seems,
    nearly none is using the native x11 forwarding, since there came no
    answers.<br>
    The only way, I got this functional, is to use salloc:<br>
    <br>
    salloc srun --x11 xterm<br>
    <br>
    See also my post  [slurm-users] slurm 17.11.2 and X11 forwarding on
    CentOS 7.4<br>
    <br>
    <br>
    Best<br>
    Marcus<br>
    <br>
    <div class="moz-cite-prefix">On 01/19/2018 10:13 PM, Mjelde, Matthew
      J wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:5f5c10d1e01341f4ab4f2eaba8edc5c9@exch-2p-mbx-t4.ads.tamu.edu">
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        <p class="MsoNormal"><span style="color:#1F497D">Thanks Marcus. 
            I thought I had installed that dependency, but I guess I
            installed it somewhere other than where I was compiling
            slurm at.  Once installed it compiled with x11 support.<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">However, now I
            have another problem.  I am able to start an x11 job using
            the command: `srun --pty --x11 bash` but no programs can
            connect to the X server.  In other words, I get “unable to
            connect to X server localhost:50.0”.  From what I see in the
            logs, it looks like it is all working properly.  This is
            what I am seeing<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:24.924]
            [1686.extern] debug2: remote accepted auth methods:
            publickey,password<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.227]
            [1686.extern] debug:  public key auth successful<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.347]
            [1686.extern] debug2: x11_set_xauth: result from xauth:
            Using authority file /home/mjmjelde/.Xauthority<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Writing
            authority file /home/mjmjelde/.Xauthority<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.347]
            [1686.extern] X11 forwarding established on
            DISPLAY=compute-01:50.0<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.347]
            [1686.extern] debug:  x11 forwarding - sending keepalive
            message<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.347]
            [1686.extern] debug:  x11 forwarding local display is 50<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.760]
            debug2: got this type of message 6001<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.760]
            debug2: Processing RPC: REQUEST_LAUNCH_TASKS<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.760]
            launch task 1686.0 request from <a class="moz-txt-link-abbreviated" href="mailto:1569.1003@192.168.2.9">1569.1003@192.168.2.9</a> (port
            41190)<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.760]
            debug:  Checking credential with 340 bytes of sig data<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.762]
            debug2: _group_cache_lookup_internal: found old entry for
            mjmjelde, looking up again<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.765]
            [1686.extern] debug:  Handling REQUEST_X11_DISPLAY<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.765]
            [1686.extern] debug:  Leaving _handle_get_x11_display<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.765]
            debug:  Leaving stepd_get_x11_display<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">[2018-01-19T15:07:25.765]
            debug2: _setup_x11_display: setting DISPLAY=localhost:50:0
            for job 1686 step 0<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Is there
            anything I am missing that I need to do to get x11
            forwarding working?<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Thanks,<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D">Matthew<o:p></o:p></span></p>
        <p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b><span style="color:windowtext">From:</span></b><span
                style="color:windowtext"> slurm-users
                [<a class="moz-txt-link-freetext" href="mailto:slurm-users-bounces@lists.schedmd.com">mailto:slurm-users-bounces@lists.schedmd.com</a>]
                <b>On Behalf Of </b>Marcus Wagner<br>
                <b>Sent:</b> Monday, January 15, 2018 1:35 AM<br>
                <b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:slurm-users@lists.schedmd.com">slurm-users@lists.schedmd.com</a><br>
                <b>Subject:</b> Re: [slurm-users] Slurm 17.11 X11
                support questions<o:p></o:p></span></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-bottom:12.0pt">Hi Matthew,<br>
          <br>
          yes, I have.<br>
          I just needed to install libssh2-devel, then the native
          support will be built in:<br>
          <br>
          $> ldd slurmstepd<br>
                  linux-vdso.so.1 =>  (0x00007fff4dbef000)<br>
                  libslurmfull.so =>
          /opt/slurm/lib64/slurm/libslurmfull.so (0x00007f4fc4bd0000)<br>
                  libhwloc.so.5 => /usr/lib64/libhwloc.so.5
          (0x00007f4fc4995000)<br>
                  libdl.so.2 => /usr/lib64/libdl.so.2
          (0x00007f4fc4791000)<br>
                  libpam.so.0 => /usr/lib64/libpam.so.0
          (0x00007f4fc4582000)<br>
                  libpam_misc.so.0 => /usr/lib64/libpam_misc.so.0
          (0x00007f4fc437d000)<br>
                  libutil.so.1 => /usr/lib64/libutil.so.1
          (0x00007f4fc417a000)<br>
                  libssh2.so.1 => /usr/lib64/libssh2.so.1
          (0x00007f4fc3f50000)<br>
                  libpthread.so.0 => /usr/lib64/libpthread.so.0
          (0x00007f4fc3d33000)<br>
                  libc.so.6 => /usr/lib64/libc.so.6
          (0x00007f4fc3970000)<br>
                  libm.so.6 => /usr/lib64/libm.so.6
          (0x00007f4fc366e000)<br>
                  libnuma.so.1 => /usr/lib64/libnuma.so.1
          (0x00007f4fc3461000)<br>
                  libltdl.so.7 => /usr/lib64/libltdl.so.7
          (0x00007f4fc3257000)<br>
                  /lib64/ld-linux-x86-64.so.2 (0x00005577dbb7f000)<br>
                  libaudit.so.1 => /usr/lib64/libaudit.so.1
          (0x00007f4fc302f000)<br>
                  libssl.so.10 => /usr/lib64/libssl.so.10
          (0x00007f4fc2dbc000)<br>
                  libcrypto.so.10 => /usr/lib64/libcrypto.so.10
          (0x00007f4fc295b000)<br>
                  libz.so.1 => /usr/lib64/libz.so.1
          (0x00007f4fc2745000)<br>
                  libgcc_s.so.1 => /usr/lib64/libgcc_s.so.1
          (0x00007f4fc252e000)<br>
                  libcap-ng.so.0 => /usr/lib64/libcap-ng.so.0
          (0x00007f4fc2328000)<br>
                  libgssapi_krb5.so.2 =>
          /usr/lib64/libgssapi_krb5.so.2 (0x00007f4fc20db000)<br>
                  libkrb5.so.3 => /usr/lib64/libkrb5.so.3
          (0x00007f4fc1df2000)<br>
                  libcom_err.so.2 => /usr/lib64/libcom_err.so.2
          (0x00007f4fc1bee000)<br>
                  libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3
          (0x00007f4fc19bb000)<br>
                  libkrb5support.so.0 =>
          /usr/lib64/libkrb5support.so.0 (0x00007f4fc17ac000)<br>
                  libkeyutils.so.1 => /usr/lib64/libkeyutils.so.1
          (0x00007f4fc15a8000)<br>
                  libresolv.so.2 => /usr/lib64/libresolv.so.2
          (0x00007f4fc138e000)<br>
                  libselinux.so.1 => /usr/lib64/libselinux.so.1
          (0x00007f4fc1166000)<br>
                  libpcre.so.1 => /usr/lib64/libpcre.so.1
          (0x00007f4fc0f04000)<br>
          <br>
          <br>
          Best<br>
          Marcus<span style="font-size:12.0pt"><o:p></o:p></span></p>
        <div>
          <p class="MsoNormal">On 01/13/2018 12:16 AM, Mjelde, Matthew J
            wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p class="MsoNormal">Howdy,<o:p></o:p></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal">I am trying to get my cluster’s native
            X11 support enabled, but am having some difficulty.  I
            generated the RPMs for slurm, installed them on my systems,
            and added the “PrologFlags=X11” in the slurm.conf file as
            well.  However, when I start up slurmd with the flag added,
            I get this error: <o:p></o:p></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal">Jan 12 16:23:52 node-01 slurmd[15904]:
            error: X11 forwarding not built in, cannot enable.<o:p></o:p></p>
          <p class="MsoNormal">Jan 12 16:23:52 node-01 slurmd[15904]:
            fatal: PrologFlags invalid: X11<o:p></o:p></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal">I believe I need to generate the RPMs
            with libssh2 support enabled, however I do not see any
            documentation or options available in the slurm.spec to do
            so.  Has anyone else been able to generate the RPMs for
            slurm 17.11 with X11 support enabled?<o:p></o:p></p>
          <p class="MsoNormal"> <o:p></o:p></p>
          <p class="MsoNormal">Thanks,<o:p></o:p></p>
          <p class="MsoNormal">Matthew<o:p></o:p></p>
        </blockquote>
        <p class="MsoNormal"><span
            style="font-size:12.0pt;font-family:"Times New
            Roman",serif"><br>
            <br>
            <o:p></o:p></span></p>
        <pre>-- <o:p></o:p></pre>
        <pre>Marcus Wagner, Dipl.-Inf.<o:p></o:p></pre>
        <pre><o:p> </o:p></pre>
        <pre>IT Center<o:p></o:p></pre>
        <pre>Abteilung: Systeme und Betrieb<o:p></o:p></pre>
        <pre>RWTH Aachen University<o:p></o:p></pre>
        <pre>Seffenter Weg 23<o:p></o:p></pre>
        <pre>52074 Aachen<o:p></o:p></pre>
        <pre>Tel: +49 241 80-24383<o:p></o:p></pre>
        <pre>Fax: +49 241 80-624383<o:p></o:p></pre>
        <pre><a href="mailto:wagner@itc.rwth-aachen.de" moz-do-not-send="true">wagner@itc.rwth-aachen.de</a><o:p></o:p></pre>
        <pre><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.itc.rwth-2Daachen.de&d=DwMD-g&c=ODFT-G5SujMiGrKuoJJjVg&r=UR4LBHzF5b_cDw_j2wfxOEm8sPXAdiAPXCqKlI8ciL8&m=r3tDky9Dn5zcA_9YNNqHRuCYBm3NU4IgotvVf5i4MBE&s=0PlzY_0YxT4VMYzS9Ex0yvZmKjP_Dq2P41bbziktsAg&e=" moz-do-not-send="true">www.itc.rwth-aachen.de</a><o:p></o:p></pre>
      </div>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
Marcus Wagner, Dipl.-Inf.

IT Center
Abteilung: Systeme und Betrieb
RWTH Aachen University
Seffenter Weg 23
52074 Aachen
Tel: +49 241 80-24383
Fax: +49 241 80-624383
<a class="moz-txt-link-abbreviated" href="mailto:wagner@itc.rwth-aachen.de">wagner@itc.rwth-aachen.de</a>
<a class="moz-txt-link-abbreviated" href="http://www.itc.rwth-aachen.de">www.itc.rwth-aachen.de</a>
</pre>
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