You got me wrong. All I wanted to achieve by that is some diagnosis. If the session is fast in X11vnc but not in X2go and if there's a difference between the x2go session being suspend or not we can probably deduce the cause of the problem. It was in no way thought as a solution or a workaround.
Another thing you could check is the options of your session. In a running session please check /tmp/.x2go-<username>/C-<your-session-id>/options and post the content. Please compare them to the options for a session startet from Linux or Windows. You can also send me the session.log in the same dir (but please not on the ML). Next thing to check: If you start a session in Linux and then reconnect to that same session from MacOS will it become slow as well? Uli On Thu, Sep 24, 2020 at 4:37 AM Scott Wood <woodystr...@hotmail.com> wrote: > > Thanks, Ulrich! > > Yes. The whole stack is the same. Only the OS on the client end is > different. I Have tested connecting from CentOS 7, Fedora 32, Windows 10, > Mac OSX 10.11 and 10.15. Windows and both Linux distros play nicely. Both > OSX versions present the lag > > I've used a few VNC flavours before but not that specific one so I'll do a > bit of reading and testing before dropping it on our production server. > > Still, as a troubleshooting step, to get as close as I could to your proposed > test, I just fired up TigerVNC server in the x2go session on the login node > and used a VNC client in that same x2go session to hit localhost:#. All > good. No lag. While that is a functioning solution, we're trying to present > an intuitive and usable solution to new users. X2go provides that (thanks > devs!) but telling new users "All you need to do is hook up to the VPN, > connect with x2go, then in that x2go, start vncserver, check your display > number, start vncviewer in there, to get a second desktop. From that submit > an interactive job, and you're good to go!" may be a bit more that they're > ready for. > > Our hope is that we can establish what is introducing the lag, iron it out, > and keep our users in the single x2go solution. Does the VNC test above shed > any light on which layer we should be troubleshooting? > > Cheers > Scott > > p.s. Apologies for the double reply. I missed the list on my first > ________________________________ > From: Ulrich Sibiller <ul...@gmx.de> > Sent: Wednesday, 23 September 2020 8:25 AM > To: Scott Wood <woodystr...@hotmail.com> > Cc: x2go-user@lists.x2go.org <x2go-user@lists.x2go.org> > Subject: Re: [X2Go-User] Lag in RStudio desktop in nested ssh sessions (or > qsub -I) MacOS clients > > On Tue, Sep 22, 2020 at 11:42 PM Scott Wood <woodystr...@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 _______________________________________________ x2go-user mailing list x2go-user@lists.x2go.org https://lists.x2go.org/listinfo/x2go-user
