Hello, I used Brice's workaround and now mpirun works well in all computers !
Thank you all for your help Jorge Le 14/11/2020 à 23:11, Brice Goglin via users a écrit :
Hello The hwloc/X11 stuff is caused by OpenMPI using a hwloc that was built with the GL backend enabled (in your case, it's because package libhwloc-plugins is installed). That backend is used for querying the locality of X11 displays running on NVIDIA GPUs (using libxnvctrl). Does running "lstopo" fail/hang too? (it will basically run hwloc without OpenMPI). One workaround should be to set HWLOC_COMPONENTS=-gl in your environment so that this backend is ignored. Recent hwloc releases have a way to avoid some plugins at runtime through the C interface, we should likely blacklist all plugins that are already blacklisted at compile time when OMPI builds its own hwloc. Brice
