[mpich-discuss] Enabling X11 apps with MPICH

[Saurabh T]

Uhh, never mind, a minute after hitting Send I realized I was using an older MPICH by mistake. This doesnt work in 3.0.x but works in 3.3. The HYDRA_LAUNCHER_EXTRA_ARGS is not needed either.

saurabh

From: Saurabh T
Sent: Wednesday, February 6, 2019 1:44 PM
To: discuss at mpich.org
Subject: Enabling X11 apps with MPICH
 
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