On 08/15/2014 12:21 AM, Lion Bino wrote: > I have a problem a midi controller, a Samson Carbon 61. When I connect > via usb, dmesg tells me the following. > > > [ 1480.097123] usb 2-1.1: new full-speed USB device number 9 > using ehci_hcd > [ 1480.118082] usb 2-1.1: no configurations > [ 1480.118087] usb 2-1.1: can't read configurations, error -22 > [ 1480.118206] hub 2-1:1.0: unable to enumerate USB device on > port 1 That's not an ALSA problem, but most probably a firmware bug. A device with bNumConfigurations == 0 is invalid. Copied the linux-usb list. > I use ubuntu 12.04 and 14.04 and nothing, I have tested in windows > and works well. Could you follow the instructions in this document and generate a usbmon trace when connecting the device? I'd like to know whether the entire device descriptor is garbled. https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/usb/usbmon.txt Thanks, Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
