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<div>Hi Mahmood,</div>
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<div>Are you physically logged into rocks7? Or are you connecting via SSH? $DISPLAY = :1 kind of means that you are physically logged into the machine</div>
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<div>Sean<br>
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<div dir="ltr">--</div>
<div dir="ltr">Sean Crosby</div>
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<div dir="ltr">Senior DevOpsHPC Engineer and HPC Team Lead | Research Platform Services</div>
<div>Research Computing | CoEPP | School of Physics<br>
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<div dir="ltr"><span style="font-size:12.8px">University of Melbourne</span><br>
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<div dir="ltr" class="gmail_attr">On Wed, 15 May 2019 at 10:09, Mahmood Naderan <<a href="mailto:mahmood.nt@gmail.com" target="_blank">mahmood.nt@gmail.com</a>> wrote:<br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">>What does this say?<br>
>echo $DISPLAY<br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">On frontend of compute-0-0?<br>
[mahmood@rocks7 ~]$ echo $DISPLAY<br>
:1<br>
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<div>>To get native X11 working with SLURM, we had to add this config to sshd_config on the login node (your rocks7 host)</div>
<div>>X11UseLocalhost no</div>
<div>>You'll then need to restart sshd</div>
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I checked that and it was commented. I modified that and restarted the service. But still get the same error<br>
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[root@rocks7 mahmood]# grep X11UseLocalhost /etc/ssh/sshd_config<br>
#X11UseLocalhost yes<br>
[root@rocks7 mahmood]# vim /etc/ssh/sshd_config<br>
[root@rocks7 mahmood]# systemctl restart sshd<br>
sshd@ sshd-keygen.service sshd.service sshd.socket
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[root@rocks7 mahmood]# systemctl restart sshd<br>
[root@rocks7 mahmood]# grep X11UseLocalhost /etc/ssh/sshd_config<br>
X11UseLocalhost no<br>
[root@rocks7 mahmood]# exit<br>
exit<br>
[mahmood@rocks7 ~]$ srun --x11 --nodelist=compute-0-0 --account y4 --partition RUBY -n 1 -c 4 --mem=1GB xclock<br>
srun: error: Cannot forward to local display. Can only use X11 forwarding with network displays.<br>
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<div class="gmail_default" style="font-family:tahoma,sans-serif">Should I modify that parameter on compute-0-0 too?<br>
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<div dir="ltr"><font face="tahoma,sans-serif">Regards,<br>
Mahmood</font><br>
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