Multi-head session management

["Balamurali Viswanathan" <balamurali viswanathan wipro com>]

Title: Message

Hi,

 

The behavior of save session in a multi-head setup is illustrated in this mail.

 

The following 2 changes are made to Client and Manager respectively

 

1. Change to Libgnomeui client :

 

In libgnomeui/libgnomeui/gnome-client.c (client_save_yourself_callback) added the line

gnome_client_set_environment (client, "DISPLAY", DisplayString (GDK_DISPLAY ( )));

 

2. Change to gnome-session :

 

In gnome-session/gnome-session/manager.c

added a function that will find whether the screen is available at the time of next login

and if not, open the application on the default screen

 

Case 1:

* Machine with 2 screens, each screen having four workspaces and one application is started in

each  of the workspaces on both the screens. (Total 8 Applications)

* Log out after saving session and log back in.

* All applications get restored properly on both the screens in the proper Workspace

 

Case 2:

* Remove one screen from the above setup (by changing /usr/dt/config/Xservers)

* Log out and log back in.

* All applications get restored on the first screen  (Total 8 Applications)

 

Case 3:

* Without saving the session last started in Case 2, log out and log in after restoring the

second screen.

* All applications get restored properly on both the screens in the proper Workspace.

 

Case 4:

* Remove the second screen and log out and log in without saving session.

* All applications get restored properly on the first screen.

* Log out and log in after saving the session and restoring the second screen.

* All applications get restored on the first screen.

 

Case 5: Check the behavior if the application explicitly sets the DISPLAY variable.

* Modified gnome-calculator to set the DISPLAY explicitly.

* Log out, log in after saving the session.

* gnome-calculator gets restored properly on the correct screen.

 

Following case describes a case where gnome-session is started on

a remote host.

 

Case 6:

* From Machine A in failsafe mode start gnome-session on Machine B.

* Invoke some applications from the started session on Machine B .

* Log out after saving the session.

* From Machine A, restart gnome-session on Machine B.

* Session gets started on Machine B and applications get restored properly.

 

* Log out of the session on Machine B.

* Log out of the failsafe mode in Machine A.

* Log in the console of Machine A with GNOME Desktop Environment.

* All saved applications and panel get restored on Machine B .

 

What is the expected behavior in this scenario?

 

Another open issue in case 6 is :

Even after Changing the DISPLAY variable in the session file to that

of Machine A, sawfish frames windows on the Machine B.

 

Please add your comments and suggestions.