Comment 10 for bug 597090

The command Oliver posted should avoid compiz starting for any of your users.

They can still force it to start and it may crash their session.

Sadly, this is an hardware specific issue so not something LTSP upstream can do much about. Most hardware I've seen works perfectly with compiz and most other hardware is properly handled with the compiz detection script.

I'm going to mark this bug as won't fix as LTSP upstream can't really do anything about it.

Just one last suggestion, you may want to try setting LDM_DIRECTX to True in your lts.conf, that sometimes fixes compiz on thin clients.