I feel like I've tried all the answers but no luck in solving the problem. I fresh installed Ubuntu 16.04.02 LTS from Windows 8 initially. Everything was working fine except sound, which does't work at all. This is the output of aplay -l
$ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0
Only HDA Intel HDMI is detected, and I've no idea why. Any help is appreciated!