On Wed, 14 Feb 2007, Michael Lara wrote: > Hello, > > Is it possible to define the removable card as the default in a system with > a permanent, internal card and a removable (ie, USB) one? I know about > passing 'index=i' to the driver modules, but I am having a hard time > figuring out how to use that mechanism when one of the cards is removable. I > would like to use the following simple rule: > > If the removable (usb) card is connected to the system, make it the default. > Otherwise, use the internal card. > > The trouble is that, once the corresponding driver modules have been loaded > with a given index number: > > /sbin/modprobe snd-usb-audio index=0 [for the removable card] > /sbin/modprobe snd-intel8x0 index=1 [for the internal card] > > With this setup, aplay fails to produce sound when the removable card is not > present since default is not set (there is no card with index 0). Yup. What you could do is to set up a little hotplug script to change the id of the onboard card ( or if your systems use /dev/dsp, put in the right links) > > Can I somehow tell alsa (in /etc/asound.conf) that the card with the *lowest > index* (ie, not necessarily the one with index=0) should be used as 'default'? have your usb hotplug script unload both cards, and reload the onboard one with index 0, and vice versa when you plug in the card. > > Thanks in advance for any help > > Michael > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys-and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
