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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Hello ParaView-Team,<br>
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we recently have experienced reproducible a segfaults of Xorg on display=1 (on CentOS 7.2 server with two NVIDIA Tesla K40), when used with:<br>
--server--<br>
parallel ParaView/5.3.0 session (compiled with VTK_USE_X)<br>
over turboVNC(2.1.1) +VirtualGL(2.2.1)<br>
--client--<br>
from a Windows7 client<br>
with turboVNC(2.1.1)<br>
(other versions of turboVNC and VirtualGL led to the same <br>
<br>
This crash does _NOT_ happen, if the vncviewer(yes: vncVIEWER!) is running on a Linux machine.
<br>
<div>As soon as ParaView GUI (running on the server with turboVNC+VirtualGL, too) connects to the pvservers running on the same machine, at least one of the pvservers on display=1 crashes (MPI leads then to a stop of the other pvservers).<br>
The crash of the pvserver on display 1 leads to a crash of Xorg of display 1 - or it is the other way round.<br>
<br>
We found that this crash can be avoided by starting the pvservers with the flag "--disable-xdisplay-test"<br>
I report this here, as it took some time to stumble over the flag "--disable-xdisplay-test" and this mail might help someone else.<br>
It seems as if the xdisplay-test is doing some nasty stuff ...<br>
<br>
As this bug is related to the OS(=Windows) of the client running turboVNC the xdisplay-test might trigger a bug in turboVNC or Xorg itself...<br>
<br>
Best,<br>
Jens Henrik<br>
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P.S:<br>
We have tested this with older ParaView versions, too (5.2.0 and 5.1.2) and got the same segfaults of Xorg of display 1.<br>
The only difference was, that ParaView 5.3.0 results in a segfault when connecting and ParaView 5.2.0+5.1.2 results in segfaults when loading data.<br>
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Forschungszentrum Juelich GmbH<br>
52425 Juelich<br>
Sitz der Gesellschaft: Juelich<br>
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498<br>
Vorsitzender des Aufsichtsrats: MinDir Dr. Karl Eugen Huthmacher<br>
Geschaeftsfuehrung: Prof. Dr.-Ing. Wolfgang Marquardt (Vorsitzender),<br>
Karsten Beneke (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,<br>
Prof. Dr. Sebastian M. Schmidt<br>
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