Hi Giovanni, thankx for you replay. I using ubuntu lucid. The alsa-driver make a problem. Alsa is compiled correcly from sources. when i execute the following command: root@freeswitch:/# modprobe snd_dummy WARNING: Error inserting snd_page_alloc (/lib/modules/2.6.32-27-generic-pae/kern el/sound/acore/snd-page-alloc.ko): Unknown symbol in module, or unknown paramete r (see dmesg) WARNING: Error inserting snd_timer (/lib/modules/2.6.32-27-generic-pae/kernel/so und/acore/snd-timer.ko): Unknown symbol in module, or unknown parameter (see dme sg) WARNING: Error inserting snd_pcm (/lib/modules/2.6.32-27-generic-pae/kernel/soun d/acore/snd-pcm.ko): Unknown symbol in module, or unknown parameter (see dmesg) FATAL: Error inserting snd_dummy (/lib/modules/2.6.32-27-generic-pae/kernel/soun d/drivers/snd-dummy.ko): Unknown symbol in module, or unknown parameter (see dme sg) i make: depmod -a i reboot the system, the problem is the same. can you looking please? tahkx. --------------- Du kannst mich jederzeit kostenlos per Festnetz erreichen unter: http://www.blindi.net/callback homepage: http://www.blindi.net blinde-misc mailingliste für blinde. anmeldung unter: http://www.blindi.net/mailman/listinfo/blinde-misc