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When booting Ubuntu 12.04, I have sound coming from my speakers through HDMI, except the start up sound (not a big deal). My card is listed in the sound settings. If I switch inputs on my monitor, the card (Radeon HD 5450) disappears.

I have tried both the proprietary drivers and open source drivers and nothing seems to fix it. As a side note my video settings don't stick after changing them. IE. Pixel format, GPU scaling, etc. I have this monitor connected with HDMI and also have a VGA cable connected to run a KVM switch, but 99% of the time run with the HDMI connection.

Anyone have any ideas?

DiamondKing1976
  • 111

1 Answers1

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Run this command in terminal : alsamixer

and check if the master-sound is set to mute. (oo is unmute and mm is mute)

enter image description here

Srinivas Gowda
  • 2,438