If your computer throws a wobbly trying to get the VSTs @ http://code.google.com/p/juced/ trying to work (specifically when loading the GUI) under Renoise linux try this -
Press Alt-F2 (assuming Gnome as WM, if not load up a terminal emu instead)
Type - gksudo gedit /etc/X11/xorg.conf
Don’t get a text editor? Try sudo nano /etc/X11/xorg.conf, or try get the file open under root via your preferred method.
Comment out the following lines with a hash e.g.
# Section "Extensions" # Option "MIT-SHM" "no" # EndSection
Restart X11, either by logging out of restarting
Launch Renoise, open the VST, hopefully tweak…
Can’t actually vouch for the stability of your system by performing this step. The Intel drivers on my Ubuntu 9.04 are a steaming pile, so much so they required upgrading - but my PC hasn’t fallen over yet and hopefully this is of use to someone else.
EDIT - In retrospect this probably shouldn’t be in tips and tricks, but somewhere techie instead. Sorry.