On Wed, Mar 19, 2008 at 1:52 PM, Cesare Marilungo <cesare@xxxxxxxxxxxxxxxxx> wrote: > > > Hi Mark, > what if you want to control the order of two different devices both usb > (and so both handled by the snd-usb-audio module? In particular I have > an usb audio interface and usb keyboard which is recognized as an audio > device (even if it doesn't have audio functionalities). The order > switches randomly at each reboot. > > Thanks in advance, > > -c. > Hi Cesare, Good to hear from you. This was the subject of another thread I asked on (I think) this list a week or two ago. Apparently there is no way to do this for cards using identical drivers. I had an opportunity to put together a machine using 3 HDSP9652's but I needed to know that order of the cards and ensure that every time I booted that the order wouldn't change. The response I got was that Alsa cannot handle this. I did a little bit of study of how Windows does this for internal cards. It appears that Windows pays attention to the resources the device is using and keeps track of those. PCI bus and slot number. IRQ assingment, etc. As loog as things don't change then it will comtinue to use them the same way every day. For external devices it seems that the best way to do this in Linux is though udev. Most external devices have a UUID of some type. If you can identify the UUID and then build a udev rule it should work but that's all way beyond my skill set. Hope this helps, Mark _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
