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--- x2go_remote_desktop [2016/01/27 20:27]
mgstauff [Using the x2go client]
+++ x2go_remote_desktop [2018/01/17 18:06] (current)
mgstauff [x2go session types]
@@ Line 32: / Line 32: @@
 It would be a little easier to connect to chead if the x2go server were running direclty on chead. However we decided that the risk of causing complications on chead and having to interrupt cluster operations to fix issues with the x2go server is not worth it.
+==== x2go Sessions are Persistent ====
+An x2go sessions persists when you lose your internet connection (e.g. you close your laptop) or when you quit your x2go client (that is, when you quit the x2goclient app without exiting/logging-out-of your x2go session). You don't have to quit/exit your x2go session when you're done for the day, and it can be very helpful not to, allowing you to easily pick up from where you left off later.
 ==== Setup for X11 ====
@@ Line 39: / Line 41: @@
 You'll need to [[http://wiki.x2go.org/doku.php/doc:installation:x2goclient|install the x2go client]] on your local machine.
-=== NOTE FOR OS X USERS ===
+==== NOTES FOR OS X USERS ====
   Dec 2015
@@ Line 57: / Line 59: @@
 ==== x2go session types ====
 There are three x2go session types available on the cx2go server. More detailed instructions regarding each session type are given below.
+**NOTE January 2018**
+The Published Applications session type is currently broken. Please use a MATE session.
   * **Published Applications session (Recommended)** - this allows you to simply run an xterm graphical terminal window from cx2go - you won't see a desktop. Then after you login to chead and run a GUI application, it'll show up in its own window on your machine. It uses less resources on the x2go server so is the recommended choice. This might be a nicer way to do things than to have a single remote desktop window with multiple applications running in it. It also *might* be slightly faster than running MATE or XFCE sessions.
   * __MATE session__ - a clone of the GNOME 2 desktop environment.
@@ Line 110: / Line 116: @@
 === 4) Login to chead ===
-At this point you have a terminal open on the cx2go server, and you want to get to chead to work as you usually do:
+At this point you should have a terminal open on the cx2go server, and you want to get to chead to work as you usually do:
   * ''ssh -Y chead-local''  (chead-local is a direct connection to the CfN cluster internal network)
@@ Line 117: / Line 123: @@
 === 5) Logout ===
-Don't forget to logout from your session when you're done.
+As described above, an x2go sessions persists when you lose your internet connection (e.g. you close your laptop) or when you quit x2go (that is, when you quit the x2goclient app without exiting your x2go session). So you don't have to quit/exit your x2go session when you're done for the day, and it can be very helpful not to, allowing you to easily pick up from where you left off later.
-**Sessions that are inactive for 12 days will be automatically terminated.**
+However, **sessions that are inactive for 12 days will be automatically terminated.** If you start a session and get back to it every 11 days, it will last indefinitely.
+**WARNING** the x2go system sometimes fails to properly restore an existing x2go session, requiring the session be terminated before starting a new one. So **you should still always save your work before leaving or stepping away from an x2go session.**
+To logout of an x2go session:
   * From a desktop session (MATE or XFCE):
       * Logout of the desktop environment. Look for a "System" menu or "Applications" menu, then a logout option.
@@ Line 128: / Line 139: @@
 If you need to run multiple x2go sessions on (e.g. if you are connecting to the CfN cluster and to another computer), then you need to run multiple instances of the x2go client on your computer, by launching the application from the command line instead of the usual GUI method. This works on OS X, and presumably on Windows too. So e.g. on OSX, open a terminal window and run ''/Applications/x2goclient.app/Contents/MacOS/x2goclient &''
+==== Troubleshooting ====
+If you can't resume an x2go session or you can't start a new one, you may have an old session stuck on the server.
+First try terminating any running sessions that show up in the x2go client when you login to a session from the client. They're listed in the dialog box that comes up, and there's a button to terminate them.
+If that doesn't work, do the following:
+  ssh <your-username>@cx2go
+  x2goterminate
+The above command should find and terminate any sessions you have running. It may take a couple minutes to take effect, or may need to be run again.
+If this fails, contact the admins.

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