On 06/02/15 12:58, Alexandros Drymonitis wrote:

I put 'sudo -u pi -i /usr/local/bin/pd -nogui -open
~/pd_patches/load_test.pd' in rc.local but again it didn't work...

~/ gets expanded by the shell to the contents of ${HOME} before the sudo command is even executed, so it's going to be root's home, usually /root - (as recommended by others) launch pd from a script, and specify the full path to the script in your /etc/rc.local sudo command (avoid using ~/ or ${HOME}).