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No sound via HDMI. Intel 82801H, Ubuntu 12.04

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http://askubuntu.com – I have just reinstalled Ubuntu 12.04 64 bits in my laptop. a Dell XPS M1330. With previous versions it used to ask me to install additional drivers (A Realtek card, i don't remember very well). But this time it seems not to need it any more. Any way sound works ok thru laptop's speakers but i don't get it working in my TV via HDMI as it used to work. Actually there is no HDMI option in the sound settings. $ aplay -l ** Lista de PLAYBACK dispositivos hardware ** tarjeta 0: Intel [HDA Intel], dispositivo 0: STAC92xx Analog [STAC92xx Analog] Subdispositivos: 1/1 Subdispo (HowTos)