Hi Jorge You may have an active firewall protecting either computer or both, and preventing mpirun to start the connection. Your /etc/hosts file may also not have the computer IP addresses. You may also want to try the --hostfile option. Likewise, the --verbose option may also help diagnose the problem.
It would help if you send the mpirun command line, the hostfile (if any), error message if any, etc. These FAQs may help diagnose and solve the problem: https://www.open-mpi.org/faq/?category=running#diagnose-multi-host-problems https://www.open-mpi.org/faq/?category=running#mpirun-hostfile https://www.open-mpi.org/faq/?category=running I hope this helps, Gus Correa On Tue, Oct 20, 2020 at 4:47 PM Jorge SILVA via users < users@lists.open-mpi.org> wrote: > Hello, > > I installed kubuntu20.4.1 with openmpi 4.0.3-0ubuntu in two different > computers in the standard way. Compiling with mpif90 works, but mpirun > hangs with no output in both systems. Even mpirun command without > parameters hangs and only twice ctrl-C typing can end the sleeping > program. Only the command > > mpirun --help > > gives the usual output. > > Seems that is something related to the terminal output, but the command > worked well for Kubuntu 18.04. Is there a way to debug or fix this > problem (without re-compiling from sources, etc)? Is it a known problem? > > Thanks, > > Jorge > >
