GNUstep applications via ssh

[Andreas Höschler]

Hi all,

I am trying to run a GNUstep application on one host and displaying it 
on another tunnelling X11 throught ssh. Actually I am using Sun Secure 
Global Desktop which allows to do exactly that.

application server                      SGD Server                              
Native SGD client
==============                  =========                               
==============
GNUstep                 <- ssh -> tarantella              <- protocol->     
MacOSX

The X11 stuff has to go from the application server to the SGD server. 
In my special case these two processes are running on the same machine. 
SGD allows to access X applications via telnet or ssh. When I use 
telnet for the conenction method it works. If I use ssh it does not. 
While trying to start Terminal.app (other GNUstep applications behave 
equally) I get the following

2007-08-28 13:43:31.029 Terminal[23395] Loading 3 user defined AppKit 
bundles
2007-08-28 13:43:31.050 Terminal[23395]
2007-08-28 13:43:31.054 Terminal[23395]
2007-08-28 13:43:31.086 Terminal[23395]
Xlib:  extension "MIT-SHM" missing on display "localhost:12.0".
2007-08-28 13:43:32.117 Terminal[23395] Waited for a second, but the X 
system never made the window visible
2007-08-28 13:43:32.120 Terminal[23395] Failed to determine offsets for 
style 1
2007-08-28 13:43:32.137 Terminal[23395] Failed to determine offsets for 
style 2
2007-08-28 13:43:32.140 Terminal[23395] Failed to determine offsets for 
style 3
2007-08-28 13:43:32.143 Terminal[23395] Failed to determine offsets for 
style 4
2007-08-28 13:43:32.146 Terminal[23395] Failed to determine offsets for 
style 5
2007-08-28 13:43:32.149 Terminal[23395] Failed to determine offsets for 
style 6
2007-08-28 13:43:32.151 Terminal[23395] Failed to determine offsets for 
style 7
2007-08-28 13:43:32.153 Terminal[23395] Failed to determine offsets for 
style 8
2007-08-28 13:43:32.156 Terminal[23395] Failed to determine offsets for 
style 9
2007-08-28 13:43:32.158 Terminal[23395] Failed to determine offsets for 
style 10
2007-08-28 13:43:32.160 Terminal[23395] Failed to determine offsets for 
style 11
2007-08-28 13:43:32.162 Terminal[23395] Failed to determine offsets for 
style 12
2007-08-28 13:43:32.164 Terminal[23395] Failed to determine offsets for 
style 13
2007-08-28 13:43:32.166 Terminal[23395] Failed to determine offsets for 
style 14
2007-08-28 13:43:32.169 Terminal[23395] Failed to determine offsets for 
style 15
2007-08-28 13:43:32.263 Terminal[23395] _appIconInit <NSIconWindow: 
0x183848>
2007-08-28 13:43:32.364 Terminal[23395] WARNING: Failed to retrieve 
MenuServer application proxy
2007-08-28 13:43:32.364 Terminal[23395] registerAsServiceProvider 
Terminal
2007-08-28 13:43:32.684 Terminal[23395]
2007-08-28 13:43:32.684 Terminal[23395] activateIgnoringOtherApps 1 
_app_is_active 0 .....
2007-08-28 13:43:32.685 Terminal[23395] posting 
NSApplicationWillBecomeActiveNotification...
2007-08-28 13:43:32.685 Terminal[23395] WARNING: Failed to retrieve 
MenuServer application proxy
2007-08-28 13:43:32.700 Terminal[23395] <TerminalApplication: 0x181e28> 
_app_is_active = YES
2007-08-28 13:43:32.700 Terminal[23395] _unhide_on_activation 1
2007-08-28 13:43:32.701 Terminal[23395] No key on activation NSMenu: 
Terminal (Normal) <NSMenuPanel: 0x2033e8>
2007-08-28 13:43:32.701 Terminal[23395] GSServerForWindow: <XGServer: 
0x227638>
2007-08-28 13:43:32.790 Terminal[23395] posting 
NSApplicationDidBecomeActiveNotification...
2007-08-28 13:43:32.793 Terminal[23395] activateIgnoringOtherApps 1 
_app_is_active 1 Done!
2007-08-28 13:43:32.805 Terminal[23395] styleoffsets ... guessing 
offsets
2007-08-28 13:43:32.805 Terminal[23395] styleoffsets ... guessing 
offsets
...

Then the whole session (window maker) dies and I am back at the login 
panel (actually ttwebtop).
I suppose "Xlib:  extension "MIT-SHM" missing on display 
"localhost:12.0"" is important here. I am using art. What does this 
message try to tell me? Window Maker comes up fine. I can also start 
(successfully) other X apps (xterm,..), but no GNUstep apps. Any idea 
why this fails?

Thanks,

  Andreas