...

It is not yet known when this workaround could be undone (e.g. by upgrading the server software).

Reconnect "Black Screen" issues.

Sometimes users will find that they are unable to reconnect to an existing session.  We do not yet understand this issue, so our solution is to terminate the user's existing sessions, and kill all the user's running processes on the Nomachine server.  Easy way to fix this is to send a note to pcds-it-l@slac.stanford.edu and we will remove old sessions and process.  Or, users can do this for themselves by ssh'ing to psnxserv and killing their own process.  Potentially useful commands follow:

Show all running user processes:
ps -f -u $USERNAME
 
Kill a specific process using its process ID (PID):
kill <PID>
 
Kill a specific process that doesn't want to die (and was not killed by> "kill <PID>"):
kill -9 <PID>
 
Kill *all* your jobs, including current ssh session, shell and the pkill command itself.
This is a quick way to get the easy kills--then ssh in again and> deal> with the hard-to-kill processes):
pkill -U $USERNAME

Note that you may have to reconnect after running "pkill" and may have to try a number of times (possibly using the -9 option, as shown with the "kill" command).

X11 fonts issues

*** Since we have upgraded to commercial version of Nomachine NX, installing x11 fonts is no longer needed. But the information could still be useful if we run our Nomachine backup server with Free NX.

If you are receiving 'Font init failed' or there is certain fonts on the screen that you don't see when running EPICS (EDM) or LCLS home screen, you will need to install the appropriate font package for the OS that you are running:

Windows: https://www.nomachine.com/download/download&id=16

MAC: http://xquartz.macosforge.org/landing/

RHEL6:

yum install xorg-x11-fonts-"*"
ln -s /usr/share/X11/fonts/75dpi /etc/X11/fontpath.d/xorg-x11-fonts-75dpi

Ubuntu: You will need to install these packages: xfonts-base, xfonts-100dpi, xfonts-75dpi, xfonts-cyrillic

Resuming a nomachine connection

...