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<p>HI Isaiah, <o:p></o:p></p>
<p>Thanks for the link. However , it defies comprehension (by me) <o:p></o:p></p>
<p><o:p> </o:p></p>
<p>The link which you sent claims the following, <o:p></o:p></p>
<p><o:p> </o:p></p>
<p><o:p> </o:p></p>
<p>2-> You can use a modern version of X that supports running a dummy framebuffer. This can be installed in user mode so you don't even need to have root on the system.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:13.5pt">Xdummy standlone<o:p></o:p></span></b></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">You can start a new display using the dummy driver without needing any special privileges (no root, no suid), you should specify your own log and config files:
<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">Xorg -noreset +extension GLX +extension RANDR +extension RENDER -logfile ./10.log -config ./xorg.conf :10<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">However, the link within the link that this link refers to does not say anything about how o install it in user mode. Do you know anyting about that ?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The nodes do not have Xorg installed.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">A workstation already has Xorg running so I don’t understand If I run as specified in the link, it either doesn’t work *<b>cannot specify –logfile with elevated
priviliges</b>* or else if I skip the logfile, it opens a *<b>real</b>* display on top of my display.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I don’t understand which part of the command is supposed to access the dummy driver.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">com09-10 ~]$ Xorg
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">-bash: Xorg: command not found<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Isaiah Norton [mailto:isaiah.norton@gmail.com]
<br>
<b>Sent:</b> 26 April 2018 19:28<br>
<b>To:</b> Atwood, Robert (DLSLtd,RAL,SCI)<br>
<b>Cc:</b> vtkusers@vtk.org<br>
<b>Subject:</b> Re: [vtkusers] Python/VTK offscreen / headless rendering<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Depends on the OS, but for Linux see some links to discussion/resources here:<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><a href="https://www.slicer.org/wiki/Documentation/Nightly/Developers/Python_scripting#How_can_I_run_Slicer_on_a_headless_compute_node.3F">https://www.slicer.org/wiki/Documentation/Nightly/Developers/Python_scripting#How_can_I_run_Slicer_on_a_headless_compute_node.3F</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Mon, Apr 23, 2018 at 6:52 AM, <a href="mailto:Robert.Atwood@diamond.ac.uk">
Robert.Atwood@diamond.ac.uk</a> <<a href="mailto:Robert.Atwood@diamond.ac.uk" target="_blank">Robert.Atwood@diamond.ac.uk</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">Hi,<br>
I would like to have a Python script to render several volume images (tomography data) on a headless machine. I could not find any advice more recent than 2011 , is this something that just isn't configured in the Python as installed from existing packages?
How do I tell?<br>
If it's not in the python , what needs to be done, at the time of prior questions it seemed to be a compile-time option of the VTK library, is that still the case, Any exaples on line that are for the current release ?
<br>
Thanks<br>
Robert<br>
<br>
<br>
<br>
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<p class="MsoNormal"><o:p> </o:p></p>
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