Comment 47 for bug 198218

http://www.alsa-project.org/db/?f=038cf2368da438b63891bbf12a3c3a147d04db26

I'm one of the "restarting alsa-utils or reloading snd-hda-intel did not work for me. sudo /sbin/alsa force-reload after resuming from suspend got the sound back" people.