Comment 19 for bug 502223

If you have disabled the soft modem using a setting in your BIOS, you can verify that it is no longer being referenced by issuing the following command from the terminal:

aplay -l

**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC883 Analog [ALC883 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 1: ALC883 Digital [ALC883 Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 6: Si3054 Modem [Si3054 Modem] <-- If the software modem has been disabled this should
  Subdevices: 1/1 no longer appear
  Subdevice #0: subdevice #0