LTSP Edubuntu 14.04, Berry Terminal - Gnome-session failed on connection

[Daniel Huhardeaux]

Hello,

I installed an Edubuntu 14.04.3 server with LTSP activated. I want to 
connect using a thin client like Pi using Berry Terminal. Problem is 
that connection failed with

gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
gnome-session[2469]: WARNING: software acceleration check failed: Child 
process exited with code 1
gnome-session[2469]: CRITICAL: We failed, but the fail whale is dead. 
Sorry....

I tried various solution from internet like upgrading to eugenen san 
ppa, problem is still there.

Question: does someone use 14.04 with LTSP ? How did you solve this 
matter knowing that few bugs are open on launchpad ? Is there an easy 
way to replace gnome-session with another binary (mate-session?) and how ?

Thanks to share your experience.

Regards

Daniel

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