I have a linux ubuntu 12.04 server machine which works with an usb sound card. When rebooting the machine, sometimes the usb sound card is recognized and sometimes not, I cannot figure out a reason for this. I understand when the sound card is recognized because when I issue the command:
I can see listed or not the line snd_usb_audio.
Analyzing the /var/log/kernel.log I can see sometimes (when it works)
kernel: [ 6.236564] usbcore: registered new interface driver snd-usb-audio
and other times (when it is not recognized and listed):
kernel: [ 7.126855] snd-usb-audio: probe of 2-1.2:1.0 failed with error -5 kernel: [ 7.126876] usbcore: registered new interface driver snd-usb-audio
Does anybody know how to ensure that the usb sound card is always recognized?