12.04 No Audio from HDMI After Switching Monitor Off / On

Question

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?

Try killall pulseaudio (http://askubuntu.com/a/176276/45779) — Eugen Labun, Dec 26 '12 at 17:16

score 1 · Answer 1 · answered May 05 '12 at 15:01

1

Run this command in terminal : alsamixer

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

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answered May 05 '12 at 15:01

Srinivas Gowda

2,408

1

Master volume is set to 70. HDMI card still disappears when switching inputs on the monitor. – DiamondKing1976 May 05 '12 at 23:10

12.04 No Audio from HDMI After Switching Monitor Off / On

1 Answers1

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