Well, tried everything: alsa, alsa-utils, alsamixer, pulseaudio, puvecontrol and a lot more. Even I changed from ubuntu to Linux mint, but I can't get sound from hdmi (laptop connected to led tv). I have a desktop pc with linux mint connected to a led tv with the same hdmi cable and works. I'm trying to make it work for a laptop Asus X555LA-XX688H. The HDMI option does not show up in sound settings neither in pavucontrol settings.aplay -Ldefault    Playback/recording through the PulseAudio sound servernull    Discard all samples (playback) or generate zero samples (capture)pulse    PulseAudio Sound Serversysdefault:CARD=PCH    HDA Intel PCH, ALC233 Analog    Default Audio Devicefront:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    Front speakerssurround40:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    4.0 Surround output to Front and Rear speakerssurround41:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    4.1 Surround output to Front, Rear and Subwoofer speakerssurround50:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    5.0 Surround output to Front, Center and Rear speakerssurround51:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    5.1 Surround output to Front, Center, Rear and Subwoofer speakerssurround71:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    7.1 Surround output to Front, Center, Side, Rear and Woofer speakersdmix:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    Direct sample mixing devicedsnoop:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    Direct sample snooping devicehw:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    Direct hardware device without any conversionsplughw:CARD=PCH,DEV=0    HDA Intel PCH, ALC233 Analog    Hardware device with all software conversionsuname -r3.13.0-24-genericI tried with oem-audio-hda-daily too. But I have and other problem: I can't see additional drivers option in linux mint 17.3. Only Software origins.lshw -C display*-display                      descripcin: VGA compatible controller       producto: Broadwell-U Integrated Graphics       fabricante: Intel Corporation       id fsico: 2       informacin del bus: pci@0000:00:02.0       versin: 09       anchura: 64 bits       reloj: 33MHz       capacidades: msi pm vga_controller bus_master cap_list rom       configuracin: driver=i915 latency=0       recursos: irq:64 memoria:b1000000-b1ffffff memoria:c0000000-cfffffff ioport:4000(size=64)I don't know what to do...
Linux mint 17.3 without HDMI sound output
drivers;audio;alsa;pulseaudio;hdmi
I fixed updating the kernel version. 3.18.29 worked for me.aplay -L | grep hdmihdmi:CARD=HDMI,DEV=0hdmi:CARD=HDMI,DEV=1hdmi:CARD=HDMI,DEV=2