[X2Go-User] Lag in RStudio desktop in nested ssh sessions (or qsub -I) MacOS clients

[Ulrich Sibiller]

On Tue, Sep 22, 2020 at 11:42 PM Scott Wood <woodystrash at hotmail.com> wrote:
>
> Hi folks,
>
> Multi-layered one here.  We have x2goserver (4.1.0.4-0.0x2go1.0.git20200228.1815.heuler.el7) available on a (CentOS7) login node of our HPC cluster for folks to submit jobs from.  If they start an x2go client session from a Mac to our login node, submit interactive jobs with X11 tunnelling enabled (or even just ssh -X directly to an execution node) and run RStudio (1.1.463) desktop from within that second host, there is an un-usable lag in their session.  If they type in the console, it can take up to 10 seconds to register and display the keystroke.  No errors, everything works, it just isn't very responsive. Linux x2go clients are fine. Windows x2go clients are fine.

Hmm, so this is tied to MacOS on the client side and everything else
is the same?

Do you have the same connection type for all the x2go sessions?

One thing you could try: run x11vnc within the x2go session and
connect to the session via vnc. Is it also slow in vnc? Suspend the
x2go session. Is anything changing in the vnc session?

Note: for this test to work you must disable the sleep feature on the
server. Expand the X2GO_NXOPTIONS variable /etc/x2go/x2goagent.options
like this:
X2GO_NXOPTIONS="sleep=0"

Afterwards start a NEW session (not reconnecting to an existing one)
and do the vnc test from above.

Uli