Hallo, Oliver M. Haynold hat gesagt: // Oliver M. Haynold wrote: > I'm trying to get a Lexicon Lambda (somewhat luxurious external soundcard > meant for recording) to work on my overcomplicated USB installation. Now > the system recognized the card and snd-usb-audio handles it, but I get the > following somewhat cryptic error message: > > [ 1354.659202] usb 4-1: new full speed USB device using uhci_hcd and address 21 > [ 1354.856797] usb 4-1: config 1 has an invalid interface number: 6 but max is 5 > [ 1354.856806] usb 4-1: config 1 has an invalid interface number: 7 but max is 5 > [ 1354.856812] usb 4-1: config 1 has no interface number 3 > [ 1354.856815] usb 4-1: config 1 has no interface number 5 Looks as if the Lambda is violating the USB specification. So far I've only seen this with M-Audio soundcards like the infamous Quattro. This happens, if device developers aren't able to count as good as a 5-year old. ;) I would hide under a rock if I was with Lexicon's USB departement. Some background: If you look at the output of "lsusb -v" you will see entries like: "bNumInterfaces 4" which numbers the interfaces on a device. (Interfaces are things like midi port, microphone, line-out etc.) A bit below you will see the "Interface Descriptor"s, they are supposed to have "bInterfaceNumber"s starting from 0 up to bNumInterfaces - 1 according to the USB specification. If interfaces are numbered in a way, that violates this, the kernel warns about this. In your case, bNumInterfaces probably is 6, but Lexicon counts from 0 to 5 like this: 0, 1, 2, 4, 6, 7 where 3 and 5 are missing, and 6 and 7 are illegal. I guess, Lexicon has never read the USB spec and they definitely never did a compliancy test. Does the card work anyways? Ciao -- Frank Barknecht _ ______footils.org_ __goto10.org__ ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
