> The problem is that I can't tell which is which. Every time the system > boots the cards move around. > > Since they're identical I can't tell them by usbid: > athena:/proc/asound# cat card[01]/usbid > 0d8c:0001 > 0d8c:0001 > > [...] > > Is there some machine readable way to tell these cards apart?
AFAIK each USB device has a unique serial number. lsusb -v should display this, and it's probably available through sysfs. I'm not sure how you could tell ALSA to order devices based on this, but as it's possibly the only way to tell devices apart that's where I'd start. Alternatively you seem to have the devices plugged into the same "hub" (i.e. two USB ports next to each other.) If you have more ports available on your motherboard, you could try different ports, as putting each device on a different hub *may* ensure the hub numbers are consistent across a restart (but if devices change order, there's a chance that the hubs may change order too.) The unique serial number is definitely the way to go if you can figure out how to get ALSA to use it. (I think udev can, but I don't know that ALSA uses udev.) Cheers, Adam. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
