[linux-audio-user] can't start jackd from normal user

Hi to the list, I've a problem starting jackd from a a normal user. I'm on debian testing and even using non-realtime mode I got this message: $ jackd -dalsa jackd 0.100.0 Copyright 2001-2005 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK compiled with System V SHM support. cannot create /dev/shm/jack-1000 directory (Permission denied) cannot create server sockets cannot create engine $ _ As you see I've jackd 0.100 (in testing there is 0.80) because after seeng this problem I've upgraded to the unstable version, but I have the same problem. I've tried both with my own kernel and with the debian binary kernel (both are 2.6.12). From root jackd works perfectly. This evening I'm going to try to compile 2.6.13, I will report any news. Thanks for any answer. Best Regards, ~ Antonio