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HDMI audio profile off is only option

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Audio RS880 Mobile GPU 4200 ATI from laptop, using kubuntu 20.04.

Trying to enable it, the only option I get is off nothing else.

I installed pulse audio which then gives new options, under pulse they all say not plug-in, and yet HDMI is plug has been plugged in.

I manually select the 1st option on the HDMI, it gets added as an option in audio output and it works.

When I change a page in Firefox browser it switches back to using laptop speakers, and have to manually select HDMI again.

It won't stay using HDMI. Also when I restart laptop, I have to go back into pulse to manually re select HDMI to add back to the audio output to select it again.

I'm trying to make RS880 enable instead of showing as off only in audio settings.

I heard I can get an AMD proprietary driver 13.1 and install it.

No idea how to do this, and would like some help. I know I have to redo this if there is a kernel update, but I wouldn't mind as long if this fixes the issue.

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