Perhaps you have the same issue I recently asked about. I have several Centos 5.2 servers with either one or several USB sound devices attached. Often they would not boot and recognize the on-board audio system. The solution that works for me is to add the line "blacklist snd-usb-audio" to "/etc/modprobe.d/blacklist" and then in "/etc/rc.local" add the lines "modprobe snd-usb-audio" and then "sleep 3". Then everything worked. Let me know if this helps or if you need something else. Cheers, Steve H. > Is there a fallback mechanism in the alsa's configurations files, so the > usb card1 is used *only if present*, else the integrated card0 is > chosen? > > Or, if there isn't, is there any smart way to do it? > > I searched the list, a similar question was asked in 2007 and the answer > was "no", but maybe something is changed since then... > > Thank you. > p. > > ------------------------------------------------------------------------------ > Open Source Business Conference (OSBC), March 24-25, 2009, San > Francisco, CA > -OSBC tackles the biggest issue in open source: Open Sourcing the > Enterprise > -Strategies to boost innovation and cut costs with open source > participation > -Receive a $600 discount off the registration fee with the source code: > SFAD > http://p.sf.net/sfu/XcvMzF8H > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user