[mpich-discuss] Enabling X11 apps with MPICH

[Saurabh T]

Hi,

I am unable to get executables that open a GUI window working with MPICH.

OpenMPI works fine:
orterun --mca plm_rsh_agent "ssh -X -n" -np 3 xcalc
brings up 3 xcalc windows.

In MPICH (latest stable version 3.3), I tried
HYDRA_LAUNCHER_EXTRA_ARGS="-X -n" mpiexec -np 3 xcalc
but this fails with:
X11 connection rejected because of wrong authentication.
Error: Can't open display: localhost:10.0

Note: default hosts in both cases are the same and not the current machine.

Does MPICH not allow X apps?

saurabh