[X2Go-Dev] Review: changes and features in X2Go

[John A. Sullivan III]

On Thu, 2012-02-02 at 11:56 +0100, Oleksandr Shneyder wrote:
> Hello X2Go users,
> 
> I want to describe some changes we made in X2Go recently.
> 
> == Multi display support features. ==
> There are two new features in X2Go to support desktops with more then
> one physical display.
> 
> 1. Run X2Go Session in "full screen" mode on one of several physical
> displays.
> With this feature you can use one of your physical monitors to display
> X2Go session in "full screen" mode.
> On this photo you can see a Windows 7 notebook with a connected VGA
> monitor running X2Go Session on display 2:
> http://www.x2go.org/_media/news:two_sess.png
> 
> You can configure this feature using Session Preferences dialog in X2Go
> client:
> http://www.x2go.org/_media/news:multidisp_set.png
> 
> Push "Identify all displays" button to find out the numbers of a
> physical displays:
> http://www.x2go.org/_media/news:ident_dsip.png
> 
> 2. Using two or more physical displays as one large virtual display
> (Xinerama)
> The advantage of Xinerama feature is to only maximize windows to the
> dimensions of the active physical display. This can be very useful not
> only for thinclients with more then one physical displays, but also if
> user stretch their X2Go sessions over more then one display in "window"
> mode.
> 
> X2Go Session running 3 maximized LibreOffice windows is stretched over 3
> physical displays:
> http://www.x2go.org/_media/news:xinerama.png
> 
> Xinerama configuration of X2Go session will be automatically updated
> every time when user moving or resizing his X2Go Session window.
> 
> ==Verifying if port is free before resuming X2Go Session ==
> 
> On start of an X2Go session 3 tcp ports for ssh tunnels (graphic, sound,
> sshfs) are reserved. The values of these ports are stored in the X2Go
> session database and used by X2Go clients every time an X2Go session
> gets resumed. Sometimes it can happen that one of these ports is already
> used by another application after the session had been suspended. As
> result, X2Go client will be unable to resume such session or start sound
> or sshfs tunnel. To avoid this problem X2Go server (>= 3.1.0.0) will
> verify if these ports are still unused before the session will be
> resumed. In other case new ports will be reserved. The new port values
> will be updated in database and sent to the X2Go client.
> 
> IMPORTANT: Older versions of X2Go client will be compatible with newest
> X2Go servers. If ports have changed between suspend and resume of a
> session, older x2goclients will try to reconnect and fail. But on the
> next attempt, X2Go client will retrieve the updated port values from the
> X2Go session database.
<snip>
Very much appreciated.  Thank you - John