Ciao Giovanni :) after the reboot the problem still lives :) my dmesg: snd: version magic '2.6.18.8-linode22 SMP mod_unload Xen PENTIUM4 REGPARM gcc-4.1' should be '2.6.18.8-linode22 SMP mod_unload Xen PENTIUM4 REGPARM gcc-4.3' snd: no version magic, tainting kernel. snd: Unknown symbol unregister_sound_special snd: Unknown symbol register_sound_special_device snd: Unknown symbol sound_class snd: no version magic, tainting kernel. snd: Unknown symbol unregister_sound_special snd: Unknown symbol register_sound_special_device snd: Unknown symbol sound_class snd: no version magic, tainting kernel. snd: Unknown symbol unregister_sound_special snd: Unknown symbol register_sound_special_device snd: Unknown symbol sound_class Maybe can be the kernel but i don´t know how resolve. Grazie mille per l'aiuto. Ciao - Andrea -