Like I said, I'm not expert. However, a quick "google" of revealed this result:
> When trying to set up x11 forwarding over an ssh session to a remote server > with the -X switch, I was getting an error like Warning: No xauth data; using > fake authentication data for X11 forwarding. > > When doing something like: > ssh -Xl root 10.1.1.9 to a remote server, the authentication worked, but I > got an error message like: > > > jason@badman ~/bin $ ssh -Xl root 10.1.1.9 > Warning: untrusted X11 forwarding setup failed: xauth key data not generated > Warning: No xauth data; using fake authentication data for X11 forwarding. > Last login: Wed Apr 14 18:18:39 2010 from 10.1.1.5 > [root@RHEL ~]# > > and any X programs I ran would not display on my local system.. > > Turns out the solution is to use the -Y switch instead. > > ssh -Yl root 10.1.1.9 > > and that worked fine. > See if that works for you - if it does, we may have to modify OMPI to accommodate. On Apr 6, 2011, at 9:19 AM, jody wrote: > Hi Ralph > No, after the above error message mpirun has exited. > > But i also noticed that it is to ssh into squid_0 and open a xterm there: > > jody@chefli ~/share/neander $ ssh -Y squid_0 > Last login: Wed Apr 6 17:14:02 CEST 2011 from chefli.uzh.ch on pts/0 > jody@squid_0 ~ $ xterm > xterm Xt error: Can't open display: > xterm: DISPLAY is not set > jody@squid_0 ~ $ export DISPLAY=130.60.126.74:0.0 > jody@squid_0 ~ $ xterm > xterm Xt error: Can't open display: 130.60.126.74:0.0 > jody@squid_0 ~ $ export DISPLAY=chefli.uzh.ch:0.0 > jody@squid_0 ~ $ xterm > xterm Xt error: Can't open display: chefli.uzh.ch:0.0 > jody@squid_0 ~ $ exit > logout > > same thing with ssh -X, but here i get the same warning/error message > as with mpirun: > > jody@chefli ~/share/neander $ ssh -X squid_0 > Warning: untrusted X11 forwarding setup failed: xauth key data not generated > Warning: No xauth data; using fake authentication data for X11 forwarding. > Last login: Wed Apr 6 17:12:31 CEST 2011 from chefli.uzh.ch on ssh > > So perhaps the whole problem is linked to that xauth-thing. > Do you have a suggestion how this can be solved? > > Thank You > Jody > > On Wed, Apr 6, 2011 at 4:41 PM, Ralph Castain <r...@open-mpi.org> wrote: >> If I read your error messages correctly, it looks like mpirun is crashing - >> the daemon is complaining that it lost the socket connection back to mpirun, >> and hence will abort. >> >> Are you seeing mpirun still alive? >> >> >> On Apr 5, 2011, at 4:46 AM, jody wrote: >> >>> Hi >>> >>> On my workstation and the cluster i set up OpenMPI (v 1.4.2) so that >>> it works in "text-mode": >>> $ mpirun -np 4 -x DISPLAY -host squid_0 printenv | grep WORLD_RANK >>> OMPI_COMM_WORLD_RANK=0 >>> OMPI_COMM_WORLD_RANK=1 >>> OMPI_COMM_WORLD_RANK=2 >>> OMPI_COMM_WORLD_RANK=3 >>> >>> but when i use the -xterm option to mpirun, it doesn't work >>> >>> $ mpirun -np 4 -x DISPLAY -host squid_0 -xterm 1,2 printenv | grep >>> WORLD_RANK >>> Warning: untrusted X11 forwarding setup failed: xauth key data not >>> generated >>> Warning: No xauth data; using fake authentication data for X11 forwarding. >>> OMPI_COMM_WORLD_RANK=0 >>> [squid_0:05266] [[55607,0],1]->[[55607,0],0] >>> mca_oob_tcp_msg_send_handler: writev failed: Bad file descriptor (9) >>> [sd = 8] >>> [squid_0:05266] [[55607,0],1] routed:binomial: Connection to >>> lifeline [[55607,0],0] lost >>> /usr/bin/xterm Xt error: Can't open display: chefli.uzh.ch:0.0 >>> /usr/bin/xterm Xt error: Can't open display: chefli.uzh.ch:0.0 >>> >>> (strange: somebody wrote his message to the console) >>> >>> No matter whether i set the DISPLAY variable to the full hostname of >>> the workstation, >>> to the IP-Adress of the workstation or simply to ":0.0", it doesn't work >>> >>> But i do have xauth data (as far as i know): >>> On the remote (squid_0): >>> jody@squid_0 ~ $ xauth list >>> chefli/unix:10 MIT-MAGIC-COOKIE-1 5293e179bc7b2036d87cbcdf14891d0c >>> chefli/unix:0 MIT-MAGIC-COOKIE-1 146c7f438fab79deb8a8a7df242b6f4b >>> chefli.uzh.ch:0 MIT-MAGIC-COOKIE-1 146c7f438fab79deb8a8a7df242b6f4b >>> >>> on the workstation: >>> $ xauth list >>> chefli/unix:10 MIT-MAGIC-COOKIE-1 5293e179bc7b2036d87cbcdf14891d0c >>> chefli/unix:0 MIT-MAGIC-COOKIE-1 146c7f438fab79deb8a8a7df242b6f4b >>> localhost.localdomain/unix:0 MIT-MAGIC-COOKIE-1 >>> 146c7f438fab79deb8a8a7df242b6f4b >>> chefli.uzh.ch/unix:0 MIT-MAGIC-COOKIE-1 146c7f438fab79deb8a8a7df242b6f4b >>> >>> In sshd_config on the workstation i have 'X11Forwarding yes' >>> I have also done >>> xhost + squid_0 >>> on the workstation. >>> >>> >>> How can i get the -xterm option running? >>> >>> Thank You >>> Jody >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
