TV Screen disconnect when playing sound over hdmi

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http://askubuntu.com – I just spent hours to configure the sound to work with HDMI. My last problem is, when I start playing sound the TV screen goes on and off, like when you change the resolution. When I stop playing sound, 3-5 seconds after, the same thing happen. I feel like everytime I play/stop the sound, the HDMI connection needs to be resetted. Really annoying! To enable the sound over HDMI, I have done : pactl set-card-profile 0 output:hdmi-stereo Which basically set the pulse audio profile to HDMI. (HowTos)