My sound stopped working after the first update came in for Elementary Loki. The sound works fine if I boot in live mode from a jump drive. I installed to hard drive 4/3/2017. I've checked to make sure it's not muted in mixer. I ran the command to make sure the sound card was recognized and it is there. My sound card is on the mother board and is HDA Intel, Realtek ALC888. I see several other posts but no fix. One suggestion I saw was to add hda Intel generic to the alsa-base.conf. That did not work for me either. If anyone had this problem and found a fix I would greatly appreciate the info.